/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted , free of charge , to any person obtaining a
* copy of this software and associated documentation files ( the " Software " ) ,
* to deal in the Software without restriction , including without limitation
* the rights to use , copy , modify , merge , publish , distribute , sublicense ,
* and / or sell copies of the Software , and to permit persons to whom the
* Software is furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice ( including the next
* paragraph ) shall be included in all copies or substantial portions of the
* Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM , DAMAGES OR OTHER
* LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING
* FROM , OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE .
*
* Author : Jani Nikula < jani . nikula @ intel . com >
*/
#include <linux/dmi.h>
#include <linux/slab.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include "i915_reg.h"
#include "i915_utils.h"
#include "intel_atomic.h"
#include "intel_backlight.h"
#include "intel_connector.h"
#include "intel_crtc.h"
#include "intel_de.h"
#include "intel_display_regs.h"
#include "intel_display_types.h"
#include "intel_dsi.h"
#include "intel_dsi_vbt.h"
#include "intel_fifo_underrun.h"
#include "intel_panel.h"
#include "intel_pfit.h"
#include "skl_scaler.h"
#include "vlv_dsi.h"
#include "vlv_dsi_pll.h"
#include "vlv_dsi_regs.h"
#include "vlv_sideband.h"
/* return pixels in terms of txbyteclkhs */
static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
u16 burst_mode_ratio)
{
return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
8 * 100 ), lane_count);
}
/* return pixels equivalent to txbyteclkhs */
static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count,
u16 burst_mode_ratio)
{
return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100 ),
(bpp * burst_mode_ratio));
}
static enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt)
{
switch (fmt) {
case VID_MODE_FORMAT_RGB888:
return MIPI_DSI_FMT_RGB888;
case VID_MODE_FORMAT_RGB666:
return MIPI_DSI_FMT_RGB666;
case VID_MODE_FORMAT_RGB666_PACKED:
return MIPI_DSI_FMT_RGB666_PACKED;
case VID_MODE_FORMAT_RGB565:
return MIPI_DSI_FMT_RGB565;
default :
MISSING_CASE(fmt);
return MIPI_DSI_FMT_RGB666;
}
}
void vlv_dsi_wait_for_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
u32 mask;
mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
if (intel_de_wait_for_set(display, MIPI_GEN_FIFO_STAT(display, port),
mask, 100 ))
drm_err(display->drm, "DPI FIFOs are not empty\n" );
}
static void write_data(struct intel_display *display,
i915_reg_t reg,
const u8 *data, u32 len)
{
u32 i, j;
for (i = 0 ; i < len; i += 4 ) {
u32 val = 0 ;
for (j = 0 ; j < min_t(u32, len - i, 4 ); j++)
val |= *data++ << 8 * j;
intel_de_write(display, reg, val);
}
}
static void read_data(struct intel_display *display,
i915_reg_t reg,
u8 *data, u32 len)
{
u32 i, j;
for (i = 0 ; i < len; i += 4 ) {
u32 val = intel_de_read(display, reg);
for (j = 0 ; j < min_t(u32, len - i, 4 ); j++)
*data++ = val >> 8 * j;
}
}
static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host);
struct intel_dsi *intel_dsi = intel_dsi_host->intel_dsi;
struct intel_display *display = to_intel_display(&intel_dsi->base);
enum port port = intel_dsi_host->port;
struct mipi_dsi_packet packet;
ssize_t ret;
const u8 *header;
i915_reg_t data_reg, ctrl_reg;
u32 data_mask, ctrl_mask;
ret = mipi_dsi_create_packet(&packet, msg);
if (ret < 0 )
return ret;
header = packet.header;
if (msg->flags & MIPI_DSI_MSG_USE_LPM) {
data_reg = MIPI_LP_GEN_DATA(display, port);
data_mask = LP_DATA_FIFO_FULL;
ctrl_reg = MIPI_LP_GEN_CTRL(display, port);
ctrl_mask = LP_CTRL_FIFO_FULL;
} else {
data_reg = MIPI_HS_GEN_DATA(display, port);
data_mask = HS_DATA_FIFO_FULL;
ctrl_reg = MIPI_HS_GEN_CTRL(display, port);
ctrl_mask = HS_CTRL_FIFO_FULL;
}
/* note: this is never true for reads */
if (packet.payload_length) {
if (intel_de_wait_for_clear(display, MIPI_GEN_FIFO_STAT(display, port),
data_mask, 50 ))
drm_err(display->drm,
"Timeout waiting for HS/LP DATA FIFO !full\n" );
write_data(display, data_reg, packet.payload,
packet.payload_length);
}
if (msg->rx_len) {
intel_de_write(display, MIPI_INTR_STAT(display, port),
GEN_READ_DATA_AVAIL);
}
if (intel_de_wait_for_clear(display, MIPI_GEN_FIFO_STAT(display, port),
ctrl_mask, 50 )) {
drm_err(display->drm,
"Timeout waiting for HS/LP CTRL FIFO !full\n" );
}
intel_de_write(display, ctrl_reg,
header[2 ] << 16 | header[1 ] << 8 | header[0 ]);
/* ->rx_len is set only for reads */
if (msg->rx_len) {
data_mask = GEN_READ_DATA_AVAIL;
if (intel_de_wait_for_set(display, MIPI_INTR_STAT(display, port),
data_mask, 50 ))
drm_err(display->drm,
"Timeout waiting for read data.\n" );
read_data(display, data_reg, msg->rx_buf, msg->rx_len);
}
/* XXX: fix for reads and writes */
return 4 + packet.payload_length;
}
static int intel_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
return 0 ;
}
static int intel_dsi_host_detach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
return 0 ;
}
static const struct mipi_dsi_host_ops intel_dsi_host_ops = {
.attach = intel_dsi_host_attach,
.detach = intel_dsi_host_detach,
.transfer = intel_dsi_host_transfer,
};
/*
* send a video mode command
*
* XXX : commands with data in MIPI_DPI_DATA ?
*/
static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs,
enum port port)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
u32 mask;
/* XXX: pipe, hs */
if (hs)
cmd &= ~DPI_LP_MODE;
else
cmd |= DPI_LP_MODE;
/* clear bit */
intel_de_write(display, MIPI_INTR_STAT(display, port), SPL_PKT_SENT_INTERRUPT);
/* XXX: old code skips write if control unchanged */
if (cmd == intel_de_read(display, MIPI_DPI_CONTROL(display, port)))
drm_dbg_kms(display->drm,
"Same special packet %02x twice in a row.\n" , cmd);
intel_de_write(display, MIPI_DPI_CONTROL(display, port), cmd);
mask = SPL_PKT_SENT_INTERRUPT;
if (intel_de_wait_for_set(display, MIPI_INTR_STAT(display, port), mask, 100 ))
drm_err(display->drm,
"Video mode command 0x%08x send failed.\n" , cmd);
return 0 ;
}
static void band_gap_reset(struct intel_display *display)
{
vlv_flisdsi_get(display->drm);
vlv_flisdsi_write(display->drm, 0 x08, 0 x0001);
vlv_flisdsi_write(display->drm, 0 x0F, 0 x0005);
vlv_flisdsi_write(display->drm, 0 x0F, 0 x0025);
udelay(150 );
vlv_flisdsi_write(display->drm, 0 x0F, 0 x0000);
vlv_flisdsi_write(display->drm, 0 x08, 0 x0000);
vlv_flisdsi_put(display->drm);
}
static int intel_dsi_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
struct intel_connector *intel_connector = intel_dsi->attached_connector;
struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
int ret;
drm_dbg_kms(display->drm, "\n" );
pipe_config->sink_format = INTEL_OUTPUT_FORMAT_RGB;
pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
ret = intel_panel_compute_config(intel_connector, adjusted_mode);
if (ret)
return ret;
ret = intel_pfit_compute_config(pipe_config, conn_state);
if (ret)
return ret;
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
return -EINVAL;
/* DSI uses short packets for sync events, so clear mode flags for DSI */
adjusted_mode->flags = 0 ;
if (intel_dsi->pixel_format == MIPI_DSI_FMT_RGB888)
pipe_config->pipe_bpp = 24 ;
else
pipe_config->pipe_bpp = 18 ;
if (display->platform.geminilake || display->platform.broxton) {
/* Enable Frame time stamp based scanline reporting */
pipe_config->mode_flags |=
I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
/* Dual link goes to DSI transcoder A. */
if (intel_dsi->ports == BIT(PORT_C))
pipe_config->cpu_transcoder = TRANSCODER_DSI_C;
else
pipe_config->cpu_transcoder = TRANSCODER_DSI_A;
ret = bxt_dsi_pll_compute(encoder, pipe_config);
if (ret)
return -EINVAL;
} else {
ret = vlv_dsi_pll_compute(encoder, pipe_config);
if (ret)
return -EINVAL;
}
pipe_config->clock_set = true ;
return 0 ;
}
static bool glk_dsi_enable_io(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
bool cold_boot = false ;
/* Set the MIPI mode
* If MIPI_Mode is off , then writing to LP_Wake bit is not reflecting .
* Power ON MIPI IO first and then write into IO reset and LP wake bits
*/
for_each_dsi_port(port, intel_dsi->ports)
intel_de_rmw(display, MIPI_CTRL(display, port), 0 , GLK_MIPIIO_ENABLE);
/* Put the IO into reset */
intel_de_rmw(display, MIPI_CTRL(display, PORT_A), GLK_MIPIIO_RESET_RELEASED, 0 );
/* Program LP Wake */
for_each_dsi_port(port, intel_dsi->ports) {
u32 tmp = intel_de_read(display, MIPI_DEVICE_READY(display, port));
intel_de_rmw(display, MIPI_CTRL(display, port),
GLK_LP_WAKE, (tmp & DEVICE_READY) ? GLK_LP_WAKE : 0 );
}
/* Wait for Pwr ACK */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
GLK_MIPIIO_PORT_POWERED, 20 ))
drm_err(display->drm, "MIPIO port is powergated\n" );
}
/* Check for cold boot scenario */
for_each_dsi_port(port, intel_dsi->ports) {
cold_boot |=
!(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY);
}
return cold_boot;
}
static void glk_dsi_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
/* Wait for MIPI PHY status bit to set */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
GLK_PHY_STATUS_PORT_READY, 20 ))
drm_err(display->drm, "PHY is not ON\n" );
}
/* Get IO out of reset */
intel_de_rmw(display, MIPI_CTRL(display, PORT_A), 0 , GLK_MIPIIO_RESET_RELEASED);
/* Get IO out of Low power state*/
for_each_dsi_port(port, intel_dsi->ports) {
if (!(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY)) {
intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_MASK, DEVICE_READY);
usleep_range(10 , 15 );
} else {
/* Enter ULPS */
intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_MASK, ULPS_STATE_ENTER | DEVICE_READY);
/* Wait for ULPS active */
if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
GLK_ULPS_NOT_ACTIVE, 20 ))
drm_err(display->drm, "ULPS not active\n" );
/* Exit ULPS */
intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_MASK, ULPS_STATE_EXIT | DEVICE_READY);
/* Enter Normal Mode */
intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_MASK,
ULPS_STATE_NORMAL_OPERATION | DEVICE_READY);
intel_de_rmw(display, MIPI_CTRL(display, port), GLK_LP_WAKE, 0 );
}
}
/* Wait for Stop state */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_set(display, MIPI_CTRL(display, port),
GLK_DATA_LANE_STOP_STATE, 20 ))
drm_err(display->drm,
"Date lane not in STOP state\n" );
}
/* Wait for AFE LATCH */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_set(display, BXT_MIPI_PORT_CTRL(port),
AFE_LATCHOUT, 20 ))
drm_err(display->drm,
"D-PHY not entering LP-11 state\n" );
}
}
static void bxt_dsi_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
u32 val;
drm_dbg_kms(display->drm, "\n" );
/* Enable MIPI PHY transparent latch */
for_each_dsi_port(port, intel_dsi->ports) {
intel_de_rmw(display, BXT_MIPI_PORT_CTRL(port), 0 , LP_OUTPUT_HOLD);
usleep_range(2000 , 2500 );
}
/* Clear ULPS and set device ready */
for_each_dsi_port(port, intel_dsi->ports) {
val = intel_de_read(display, MIPI_DEVICE_READY(display, port));
val &= ~ULPS_STATE_MASK;
intel_de_write(display, MIPI_DEVICE_READY(display, port), val);
usleep_range(2000 , 2500 );
val |= DEVICE_READY;
intel_de_write(display, MIPI_DEVICE_READY(display, port), val);
}
}
static void vlv_dsi_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
drm_dbg_kms(display->drm, "\n" );
vlv_flisdsi_get(display->drm);
/* program rcomp for compliance, reduce from 50 ohms to 45 ohms
* needed everytime after power gate */
vlv_flisdsi_write(display->drm, 0 x04, 0 x0004);
vlv_flisdsi_put(display->drm);
/* bandgap reset is needed after everytime we do power gate */
band_gap_reset(display);
for_each_dsi_port(port, intel_dsi->ports) {
intel_de_write(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_ENTER);
usleep_range(2500 , 3000 );
/* Enable MIPI PHY transparent latch
* Common bit for both MIPI Port A & MIPI Port C
* No similar bit in MIPI Port C reg
*/
intel_de_rmw(display, VLV_MIPI_PORT_CTRL(PORT_A), 0 , LP_OUTPUT_HOLD);
usleep_range(1000 , 1500 );
intel_de_write(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_EXIT);
usleep_range(2500 , 3000 );
intel_de_write(display, MIPI_DEVICE_READY(display, port),
DEVICE_READY);
usleep_range(2500 , 3000 );
}
}
static void intel_dsi_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
if (display->platform.geminilake)
glk_dsi_device_ready(encoder);
else if (display->platform.geminilake || display->platform.broxton)
bxt_dsi_device_ready(encoder);
else
vlv_dsi_device_ready(encoder);
}
static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
/* Enter ULPS */
for_each_dsi_port(port, intel_dsi->ports)
intel_de_rmw(display, MIPI_DEVICE_READY(display, port),
ULPS_STATE_MASK, ULPS_STATE_ENTER | DEVICE_READY);
/* Wait for MIPI PHY status bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
GLK_PHY_STATUS_PORT_READY, 20 ))
drm_err(display->drm, "PHY is not turning OFF\n" );
}
/* Wait for Pwr ACK bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
GLK_MIPIIO_PORT_POWERED, 20 ))
drm_err(display->drm,
"MIPI IO Port is not powergated\n" );
}
}
static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
/* Put the IO into reset */
intel_de_rmw(display, MIPI_CTRL(display, PORT_A), GLK_MIPIIO_RESET_RELEASED, 0 );
/* Wait for MIPI PHY status bit to unset */
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_wait_for_clear(display, MIPI_CTRL(display, port),
GLK_PHY_STATUS_PORT_READY, 20 ))
drm_err(display->drm, "PHY is not turning OFF\n" );
}
/* Clear MIPI mode */
for_each_dsi_port(port, intel_dsi->ports)
intel_de_rmw(display, MIPI_CTRL(display, port), GLK_MIPIIO_ENABLE, 0 );
}
static void glk_dsi_clear_device_ready(struct intel_encoder *encoder)
{
glk_dsi_enter_low_power_mode(encoder);
glk_dsi_disable_mipi_io(encoder);
}
static i915_reg_t port_ctrl_reg(struct intel_display *display, enum port port)
{
return display->platform.geminilake || display->platform.broxton ?
BXT_MIPI_PORT_CTRL(port) : VLV_MIPI_PORT_CTRL(port);
}
static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
drm_dbg_kms(display->drm, "\n" );
for_each_dsi_port(port, intel_dsi->ports) {
/* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */
i915_reg_t port_ctrl = display->platform.broxton ?
BXT_MIPI_PORT_CTRL(port) : VLV_MIPI_PORT_CTRL(PORT_A);
intel_de_write(display, MIPI_DEVICE_READY(display, port),
DEVICE_READY | ULPS_STATE_ENTER);
usleep_range(2000 , 2500 );
intel_de_write(display, MIPI_DEVICE_READY(display, port),
DEVICE_READY | ULPS_STATE_EXIT);
usleep_range(2000 , 2500 );
intel_de_write(display, MIPI_DEVICE_READY(display, port),
DEVICE_READY | ULPS_STATE_ENTER);
usleep_range(2000 , 2500 );
/*
* On VLV / CHV , wait till Clock lanes are in LP - 00 state for MIPI
* Port A only . MIPI Port C has no similar bit for checking .
*/
if ((display->platform.broxton || port == PORT_A) &&
intel_de_wait_for_clear(display, port_ctrl,
AFE_LATCHOUT, 30 ))
drm_err(display->drm, "DSI LP not going Low\n" );
/* Disable MIPI PHY transparent latch */
intel_de_rmw(display, port_ctrl, LP_OUTPUT_HOLD, 0 );
usleep_range(1000 , 1500 );
intel_de_write(display, MIPI_DEVICE_READY(display, port), 0 x00);
usleep_range(2000 , 2500 );
}
}
static void intel_dsi_port_enable(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
u32 temp = intel_dsi->pixel_overlap;
if (display->platform.geminilake || display->platform.broxton) {
for_each_dsi_port(port, intel_dsi->ports)
intel_de_rmw(display, MIPI_CTRL(display, port),
BXT_PIXEL_OVERLAP_CNT_MASK,
temp << BXT_PIXEL_OVERLAP_CNT_SHIFT);
} else {
intel_de_rmw(display, VLV_CHICKEN_3,
PIXEL_OVERLAP_CNT_MASK,
temp << PIXEL_OVERLAP_CNT_SHIFT);
}
}
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t port_ctrl = port_ctrl_reg(display, port);
u32 temp;
temp = intel_de_read(display, port_ctrl);
temp &= ~LANE_CONFIGURATION_MASK;
temp &= ~DUAL_LINK_MODE_MASK;
if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) {
temp |= (intel_dsi->dual_link - 1 )
<< DUAL_LINK_MODE_SHIFT;
if (display->platform.broxton)
temp |= LANE_CONFIGURATION_DUAL_LINK_A;
else
temp |= crtc->pipe ?
LANE_CONFIGURATION_DUAL_LINK_B :
LANE_CONFIGURATION_DUAL_LINK_A;
}
if (intel_dsi->pixel_format != MIPI_DSI_FMT_RGB888)
temp |= DITHERING_ENABLE;
/* assert ip_tg_enable signal */
intel_de_write(display, port_ctrl, temp | DPI_ENABLE);
intel_de_posting_read(display, port_ctrl);
}
}
static void intel_dsi_port_disable(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t port_ctrl = port_ctrl_reg(display, port);
/* de-assert ip_tg_enable signal */
intel_de_rmw(display, port_ctrl, DPI_ENABLE, 0 );
intel_de_posting_read(display, port_ctrl);
}
}
static void intel_dsi_prepare(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config);
static void intel_dsi_unprepare(struct intel_encoder *encoder);
/*
* Panel enable / disable sequences from the VBT spec .
*
* Note the spec has AssertReset / DeassertReset swapped from their
* usual naming . We use the normal names to avoid confusion ( so below
* they are swapped compared to the spec ) .
*
* Steps starting with MIPI refer to VBT sequences , note that for v2
* VBTs several steps which have a VBT in v2 are expected to be handled
* directly by the driver , by directly driving gpios for example .
*
* v2 video mode seq v3 video mode seq command mode seq
* - power on - MIPIPanelPowerOn - power on
* - wait t1 + t2 - wait t1 + t2
* - MIPIDeassertResetPin - MIPIDeassertResetPin - MIPIDeassertResetPin
* - io lines to lp - 11 - io lines to lp - 11 - io lines to lp - 11
* - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds - MIPISendInitialDcsCmds
* - MIPITearOn
* - MIPIDisplayOn
* - turn on DPI - turn on DPI - set pipe to dsr mode
* - MIPIDisplayOn - MIPIDisplayOn
* - wait t5 - wait t5
* - backlight on - MIPIBacklightOn - backlight on
* . . . . . . . . . issue mem cmds . . .
* - backlight off - MIPIBacklightOff - backlight off
* - wait t6 - wait t6
* - MIPIDisplayOff
* - turn off DPI - turn off DPI - disable pipe dsr mode
* - MIPITearOff
* - MIPIDisplayOff - MIPIDisplayOff
* - io lines to lp - 00 - io lines to lp - 00 - io lines to lp - 00
* - MIPIAssertResetPin - MIPIAssertResetPin - MIPIAssertResetPin
* - wait t3 - wait t3
* - power off - MIPIPanelPowerOff - power off
* - wait t4 - wait t4
*/
/*
* DSI port enable has to be done before pipe and plane enable , so we do it in
* the pre_enable hook instead of the enable hook .
*/
static void intel_dsi_pre_enable(struct intel_atomic_state *state,
struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config,
const struct drm_connector_state *conn_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
enum pipe pipe = crtc->pipe;
enum port port;
bool glk_cold_boot = false ;
drm_dbg_kms(display->drm, "\n" );
intel_dsi_wait_panel_power_cycle(intel_dsi);
intel_set_cpu_fifo_underrun_reporting(display, pipe, true );
/*
* The BIOS may leave the PLL in a wonky state where it doesn ' t
* lock . It needs to be fully powered down to fix it .
*/
if (display->platform.geminilake || display->platform.broxton) {
bxt_dsi_pll_disable(encoder);
bxt_dsi_pll_enable(encoder, pipe_config);
} else {
vlv_dsi_pll_disable(encoder);
vlv_dsi_pll_enable(encoder, pipe_config);
}
if (display->platform.broxton) {
/* Add MIPI IO reset programming for modeset */
intel_de_rmw(display, BXT_P_CR_GT_DISP_PWRON, 0 , MIPIO_RST_CTRL);
/* Power up DSI regulator */
intel_de_write(display, BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
intel_de_write(display, BXT_P_DSI_REGULATOR_TX_CTRL, 0 );
}
if (display->platform.valleyview || display->platform.cherryview) {
/* Disable DPOunit clock gating, can stall pipe */
intel_de_rmw(display, DSPCLK_GATE_D(display),
0 , DPOUNIT_CLOCK_GATE_DISABLE);
}
if (!display->platform.geminilake)
intel_dsi_prepare(encoder, pipe_config);
/* Give the panel time to power-on and then deassert its reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
msleep(intel_dsi->panel_on_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET);
if (display->platform.geminilake) {
glk_cold_boot = glk_dsi_enable_io(encoder);
/* Prepare port in cold boot(s3/s4) scenario */
if (glk_cold_boot)
intel_dsi_prepare(encoder, pipe_config);
}
/* Put device in ready state (LP-11) */
intel_dsi_device_ready(encoder);
/* Prepare port in normal boot scenario */
if (display->platform.geminilake && !glk_cold_boot)
intel_dsi_prepare(encoder, pipe_config);
/* Send initialization commands in LP mode */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_INIT_OTP);
/*
* Enable port in pre - enable phase itself because as per hw team
* recommendation , port should be enabled before plane & pipe
*/
if (is_cmd_mode(intel_dsi)) {
for_each_dsi_port(port, intel_dsi->ports)
intel_de_write(display,
MIPI_MAX_RETURN_PKT_SIZE(display, port), 8 * 4 );
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_ON);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
} else {
msleep(20 ); /* XXX */
for_each_dsi_port(port, intel_dsi->ports)
dpi_send_cmd(intel_dsi, TURN_ON, false , port);
msleep(100 );
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
intel_dsi_port_enable(encoder, pipe_config);
}
intel_backlight_enable(pipe_config, conn_state);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
}
static void bxt_dsi_enable(struct intel_atomic_state *state,
struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
intel_crtc_vblank_on(crtc_state);
}
/*
* DSI port disable has to be done after pipe and plane disable , so we do it in
* the post_disable hook .
*/
static void intel_dsi_disable(struct intel_atomic_state *state,
struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
const struct drm_connector_state *old_conn_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
drm_dbg_kms(display->drm, "\n" );
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
intel_backlight_disable(old_conn_state);
/*
* According to the spec we should send SHUTDOWN before
* MIPI_SEQ_DISPLAY_OFF only for v3 + VBTs , but field testing
* has shown that the v3 sequence works for v2 VBTs too
*/
if (is_vid_mode(intel_dsi)) {
/* Send Shutdown command to the panel in LP mode */
for_each_dsi_port(port, intel_dsi->ports)
dpi_send_cmd(intel_dsi, SHUTDOWN, false , port);
msleep(10 );
}
}
static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
if (display->platform.geminilake)
glk_dsi_clear_device_ready(encoder);
else
vlv_dsi_clear_device_ready(encoder);
}
static void intel_dsi_post_disable(struct intel_atomic_state *state,
struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
const struct drm_connector_state *old_conn_state)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
drm_dbg_kms(display->drm, "\n" );
if (display->platform.geminilake || display->platform.broxton) {
intel_crtc_vblank_off(old_crtc_state);
skl_scaler_disable(old_crtc_state);
}
if (is_vid_mode(intel_dsi)) {
for_each_dsi_port(port, intel_dsi->ports)
vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
intel_dsi_port_disable(encoder);
usleep_range(2000 , 5000 );
}
intel_dsi_unprepare(encoder);
/*
* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed
*/
if (is_cmd_mode(intel_dsi))
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_TEAR_OFF);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DISPLAY_OFF);
/* Transition to LP-00 */
intel_dsi_clear_device_ready(encoder);
if (display->platform.broxton) {
/* Power down DSI regulator to save power */
intel_de_write(display, BXT_P_DSI_REGULATOR_CFG, STAP_SELECT);
intel_de_write(display, BXT_P_DSI_REGULATOR_TX_CTRL,
HS_IO_CTRL_SELECT);
/* Add MIPI IO reset programming for modeset */
intel_de_rmw(display, BXT_P_CR_GT_DISP_PWRON, MIPIO_RST_CTRL, 0 );
}
if (display->platform.geminilake || display->platform.broxton) {
bxt_dsi_pll_disable(encoder);
} else {
vlv_dsi_pll_disable(encoder);
intel_de_rmw(display, DSPCLK_GATE_D(display),
DPOUNIT_CLOCK_GATE_DISABLE, 0 );
}
/* Assert reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);
msleep(intel_dsi->panel_off_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
intel_dsi->panel_power_off_time = ktime_get_boottime();
}
static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
enum pipe *pipe)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
intel_wakeref_t wakeref;
enum port port;
bool active = false ;
drm_dbg_kms(display->drm, "\n" );
wakeref = intel_display_power_get_if_enabled(display,
encoder->power_domain);
if (!wakeref)
return false ;
/*
* On Broxton the PLL needs to be enabled with a valid divider
* configuration , otherwise accessing DSI registers will hang the
* machine . See BSpec North Display Engine registers / MIPI [ BXT ] .
*/
if ((display->platform.geminilake || display->platform.broxton) &&
!bxt_dsi_pll_is_enabled(display))
goto out_put_power;
/* XXX: this only works for one DSI output */
for_each_dsi_port(port, intel_dsi->ports) {
i915_reg_t port_ctrl = port_ctrl_reg(display, port);
bool enabled = intel_de_read(display, port_ctrl) & DPI_ENABLE;
/*
* Due to some hardware limitations on VLV / CHV , the DPI enable
* bit in port C control register does not get set . As a
* workaround , check pipe B conf instead .
*/
if ((display->platform.valleyview || display->platform.cherryview) &&
port == PORT_C)
enabled = intel_de_read(display,
TRANSCONF(display, PIPE_B)) & TRANSCONF_ENABLE;
/* Try command mode if video mode not enabled */
if (!enabled) {
u32 tmp = intel_de_read(display,
MIPI_DSI_FUNC_PRG(display, port));
enabled = tmp & CMD_MODE_DATA_WIDTH_MASK;
}
if (!enabled)
continue ;
if (!(intel_de_read(display, MIPI_DEVICE_READY(display, port)) & DEVICE_READY))
continue ;
if (display->platform.geminilake || display->platform.broxton) {
u32 tmp = intel_de_read(display, MIPI_CTRL(display, port));
tmp &= BXT_PIPE_SELECT_MASK;
tmp >>= BXT_PIPE_SELECT_SHIFT;
if (drm_WARN_ON(display->drm, tmp > PIPE_C))
continue ;
*pipe = tmp;
} else {
*pipe = port == PORT_A ? PIPE_A : PIPE_B;
}
active = true ;
break ;
}
out_put_power:
intel_display_power_put(display, encoder->power_domain, wakeref);
return active;
}
static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct intel_display *display = to_intel_display(encoder);
struct drm_display_mode *adjusted_mode =
&pipe_config->hw.adjusted_mode;
struct drm_display_mode *adjusted_mode_sw;
struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
unsigned int lane_count = intel_dsi->lane_count;
unsigned int bpp, fmt;
enum port port;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
u16 hfp_sw, hsync_sw, hbp_sw;
u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw,
crtc_hblank_start_sw, crtc_hblank_end_sw;
/* FIXME: hw readout should not depend on SW state */
adjusted_mode_sw = &crtc->config->hw.adjusted_mode;
/*
* Atleast one port is active as encoder - > get_config called only if
* encoder - > get_hw_state ( ) returns true .
*/
for_each_dsi_port(port, intel_dsi->ports) {
if (intel_de_read(display, BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE)
break ;
}
fmt = intel_de_read(display, MIPI_DSI_FUNC_PRG(display, port)) & VID_MODE_FORMAT_MASK;
bpp = mipi_dsi_pixel_format_to_bpp(
pixel_format_from_register_bits(fmt));
pipe_config->pipe_bpp = bdw_get_pipe_misc_bpp(crtc);
/* Enable Frame time stamo based scanline reporting */
pipe_config->mode_flags |=
I915_MODE_FLAG_GET_SCANLINE_FROM_TIMESTAMP;
/* In terms of pixels */
adjusted_mode->crtc_hdisplay =
intel_de_read(display,
BXT_MIPI_TRANS_HACTIVE(port));
adjusted_mode->crtc_vdisplay =
intel_de_read(display,
BXT_MIPI_TRANS_VACTIVE(port));
adjusted_mode->crtc_vtotal =
intel_de_read(display,
BXT_MIPI_TRANS_VTOTAL(port)) + 1 ;
hactive = adjusted_mode->crtc_hdisplay;
hfp = intel_de_read(display, MIPI_HFP_COUNT(display, port));
/*
* Meaningful for video mode non - burst sync pulse mode only ,
* can be zero for non - burst sync events and burst modes
*/
hsync = intel_de_read(display, MIPI_HSYNC_PADDING_COUNT(display, port));
hbp = intel_de_read(display, MIPI_HBP_COUNT(display, port));
/* horizontal values are in terms of high speed byte clock */
hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count,
intel_dsi->burst_mode_ratio);
if (intel_dsi->dual_link) {
hfp *= 2 ;
hsync *= 2 ;
hbp *= 2 ;
}
/* vertical values are in terms of lines */
vfp = intel_de_read(display, MIPI_VFP_COUNT(display, port));
vbp = intel_de_read(display, MIPI_VBP_COUNT(display, port));
vsync = intel_de_read(display, MIPI_VSYNC_PADDING_COUNT(display, port));
adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp;
adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay;
adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start;
adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
drm_WARN_ON(display->drm, adjusted_mode->crtc_vdisplay +
vfp + vsync + vbp != adjusted_mode->crtc_vtotal);
adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay;
adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start;
adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
/*
* In BXT DSI there is no regs programmed with few horizontal timings
* in Pixels but txbyteclkhs . . So retrieval process adds some
* ROUND_UP ERRORS in the process of PIXELS < = = > txbyteclkhs .
* Actually here for the given adjusted_mode , we are calculating the
* value programmed to the port and then back to the horizontal timing
* param in pixels . This is the expected value , including roundup errors
* And if that is same as retrieved value from port , then
* ( HW state ) adjusted_mode ' s horizontal timings are corrected to
* match with SW state to nullify the errors .
*/
/* Calculating the value programmed to the Port register */
hfp_sw = adjusted_mode_sw->crtc_hsync_start -
adjusted_mode_sw->crtc_hdisplay;
hsync_sw = adjusted_mode_sw->crtc_hsync_end -
adjusted_mode_sw->crtc_hsync_start;
hbp_sw = adjusted_mode_sw->crtc_htotal -
adjusted_mode_sw->crtc_hsync_end;
if (intel_dsi->dual_link) {
hfp_sw /= 2 ;
hsync_sw /= 2 ;
hbp_sw /= 2 ;
}
hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
/* Reverse calculating the adjusted mode parameters from port reg vals*/
hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count,
intel_dsi->burst_mode_ratio);
if (intel_dsi->dual_link) {
hfp_sw *= 2 ;
hsync_sw *= 2 ;
hbp_sw *= 2 ;
}
crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw +
hsync_sw + hbp_sw;
crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay;
crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw;
crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay;
crtc_hblank_end_sw = crtc_htotal_sw;
if (adjusted_mode->crtc_htotal == crtc_htotal_sw)
adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal;
if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw)
adjusted_mode->crtc_hsync_start =
adjusted_mode_sw->crtc_hsync_start;
if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw)
adjusted_mode->crtc_hsync_end =
adjusted_mode_sw->crtc_hsync_end;
if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw)
adjusted_mode->crtc_hblank_start =
adjusted_mode_sw->crtc_hblank_start;
if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw)
adjusted_mode->crtc_hblank_end =
adjusted_mode_sw->crtc_hblank_end;
}
static void intel_dsi_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
u32 pclk;
drm_dbg_kms(display->drm, "\n" );
pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
if (display->platform.geminilake || display->platform.broxton) {
bxt_dsi_get_pipe_config(encoder, pipe_config);
pclk = bxt_dsi_get_pclk(encoder, pipe_config);
} else {
pclk = vlv_dsi_get_pclk(encoder, pipe_config);
}
pipe_config->port_clock = pclk;
/* FIXME definitely not right for burst/cmd mode/pixel overlap */
pipe_config->hw.adjusted_mode.crtc_clock = pclk;
if (intel_dsi->dual_link)
pipe_config->hw.adjusted_mode.crtc_clock *= 2 ;
}
/* return txclkesc cycles in terms of divider and duration in us */
static u16 txclkesc(u32 divider, unsigned int us)
{
switch (divider) {
case ESCAPE_CLOCK_DIVIDER_1:
default :
return 20 * us;
case ESCAPE_CLOCK_DIVIDER_2:
return 10 * us;
case ESCAPE_CLOCK_DIVIDER_4:
return 5 * us;
}
}
static void set_dsi_timings(struct intel_encoder *encoder,
const struct drm_display_mode *adjusted_mode)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
unsigned int lane_count = intel_dsi->lane_count;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
hactive = adjusted_mode->crtc_hdisplay;
hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay;
hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end;
if (intel_dsi->dual_link) {
hactive /= 2 ;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
hactive += intel_dsi->pixel_overlap;
hfp /= 2 ;
hsync /= 2 ;
hbp /= 2 ;
}
vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay;
vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end;
/* horizontal values are in terms of high speed byte clock */
hactive = txbyteclkhs(hactive, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
hsync = txbyteclkhs(hsync, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
for_each_dsi_port(port, intel_dsi->ports) {
if (display->platform.geminilake || display->platform.broxton) {
/*
* Program hdisplay and vdisplay on MIPI transcoder .
* This is different from calculated hactive and
* vactive , as they are calculated per channel basis ,
* whereas these values should be based on resolution .
*/
intel_de_write(display, BXT_MIPI_TRANS_HACTIVE(port),
adjusted_mode->crtc_hdisplay);
intel_de_write(display, BXT_MIPI_TRANS_VACTIVE(port),
adjusted_mode->crtc_vdisplay);
intel_de_write(display, BXT_MIPI_TRANS_VTOTAL(port),
adjusted_mode->crtc_vtotal - 1 );
}
intel_de_write(display, MIPI_HACTIVE_AREA_COUNT(display, port),
hactive);
intel_de_write(display, MIPI_HFP_COUNT(display, port), hfp);
/* meaningful for video mode non-burst sync pulse mode only,
* can be zero for non-burst sync events and burst modes */
intel_de_write(display, MIPI_HSYNC_PADDING_COUNT(display, port),
hsync);
intel_de_write(display, MIPI_HBP_COUNT(display, port), hbp);
/* vertical values are in terms of lines */
intel_de_write(display, MIPI_VFP_COUNT(display, port), vfp);
intel_de_write(display, MIPI_VSYNC_PADDING_COUNT(display, port),
vsync);
intel_de_write(display, MIPI_VBP_COUNT(display, port), vbp);
}
}
static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt)
{
switch (fmt) {
case MIPI_DSI_FMT_RGB888:
return VID_MODE_FORMAT_RGB888;
case MIPI_DSI_FMT_RGB666:
return VID_MODE_FORMAT_RGB666;
case MIPI_DSI_FMT_RGB666_PACKED:
return VID_MODE_FORMAT_RGB666_PACKED;
case MIPI_DSI_FMT_RGB565:
return VID_MODE_FORMAT_RGB565;
default :
MISSING_CASE(fmt);
return VID_MODE_FORMAT_RGB666;
}
}
static void intel_dsi_prepare(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
enum port port;
unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
u32 val, tmp;
u16 mode_hdisplay;
drm_dbg_kms(display->drm, "pipe %c\n" , pipe_name(crtc->pipe));
mode_hdisplay = adjusted_mode->crtc_hdisplay;
if (intel_dsi->dual_link) {
mode_hdisplay /= 2 ;
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
mode_hdisplay += intel_dsi->pixel_overlap;
}
for_each_dsi_port(port, intel_dsi->ports) {
if (display->platform.valleyview || display->platform.cherryview) {
/*
* escape clock divider , 20 MHz , shared for A and C .
* device ready must be off when doing this ! txclkesc ?
*/
tmp = intel_de_read(display, MIPI_CTRL(display, PORT_A));
tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
intel_de_write(display, MIPI_CTRL(display, PORT_A),
tmp | ESCAPE_CLOCK_DIVIDER_1);
/* read request priority is per pipe */
tmp = intel_de_read(display, MIPI_CTRL(display, port));
tmp &= ~READ_REQUEST_PRIORITY_MASK;
intel_de_write(display, MIPI_CTRL(display, port),
tmp | READ_REQUEST_PRIORITY_HIGH);
} else if (display->platform.geminilake || display->platform.broxton) {
enum pipe pipe = crtc->pipe;
intel_de_rmw(display, MIPI_CTRL(display, port),
BXT_PIPE_SELECT_MASK, BXT_PIPE_SELECT(pipe));
}
/* XXX: why here, why like this? handling in irq handler?! */
intel_de_write(display, MIPI_INTR_STAT(display, port), 0 xffffffff);
intel_de_write(display, MIPI_INTR_EN(display, port), 0 xffffffff);
intel_de_write(display, MIPI_DPHY_PARAM(display, port),
intel_dsi->dphy_reg);
intel_de_write(display, MIPI_DPI_RESOLUTION(display, port),
adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT | mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT);
}
set_dsi_timings(encoder, adjusted_mode);
val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
if (is_cmd_mode(intel_dsi)) {
val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
} else {
val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
val |= pixel_format_to_reg(intel_dsi->pixel_format);
}
tmp = 0 ;
if (intel_dsi->eotp_pkt == 0 )
tmp |= EOT_DISABLE;
if (intel_dsi->clock_stop)
tmp |= CLOCKSTOP;
if (display->platform.geminilake || display->platform.broxton) {
tmp |= BXT_DPHY_DEFEATURE_EN;
if (!is_cmd_mode(intel_dsi))
tmp |= BXT_DEFEATURE_DPI_FIFO_CTR;
}
for_each_dsi_port(port, intel_dsi->ports) {
intel_de_write(display, MIPI_DSI_FUNC_PRG(display, port), val);
/* timeouts for recovery. one frame IIUC. if counter expires,
* EOT and stop state. */
/*
* In burst mode , value greater than one DPI line Time in byte
* clock ( txbyteclkhs ) To timeout this timer 1 + of the above
* said value is recommended .
*
* In non - burst mode , Value greater than one DPI frame time in
* byte clock ( txbyteclkhs ) To timeout this timer 1 + of the above
* said value is recommended .
*
* In DBI only mode , value greater than one DBI frame time in
* byte clock ( txbyteclkhs ) To timeout this timer 1 + of the above
* said value is recommended .
*/
if (is_vid_mode(intel_dsi) &&
intel_dsi->video_mode == BURST_MODE) {
intel_de_write(display, MIPI_HS_TX_TIMEOUT(display, port),
txbyteclkhs(adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1 );
} else {
intel_de_write(display, MIPI_HS_TX_TIMEOUT(display, port),
txbyteclkhs(adjusted_mode->crtc_vtotal * adjusted_mode->crtc_htotal, bpp, intel_dsi->lane_count, intel_dsi->burst_mode_ratio) + 1 );
}
intel_de_write(display, MIPI_LP_RX_TIMEOUT(display, port),
intel_dsi->lp_rx_timeout);
intel_de_write(display, MIPI_TURN_AROUND_TIMEOUT(display, port),
intel_dsi->turn_arnd_val);
intel_de_write(display, MIPI_DEVICE_RESET_TIMER(display, port),
intel_dsi->rst_timer_val);
/* dphy stuff */
/* in terms of low power clock */
intel_de_write(display, MIPI_INIT_COUNT(display, port),
txclkesc(intel_dsi->escape_clk_div, 100 ));
if ((display->platform.geminilake || display->platform.broxton) &&
!intel_dsi->dual_link) {
/*
* BXT spec says write MIPI_INIT_COUNT for
* both the ports , even if only one is
* getting used . So write the other port
* if not in dual link mode .
*/
intel_de_write(display,
MIPI_INIT_COUNT(display, port == PORT_A ? PORT_C : PORT_A),
intel_dsi->init_count);
}
/* recovery disables */
intel_de_write(display, MIPI_EOT_DISABLE(display, port), tmp);
/* in terms of low power clock */
intel_de_write(display, MIPI_INIT_COUNT(display, port),
intel_dsi->init_count);
/* in terms of txbyteclkhs. actual high to low switch +
* MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK .
*
* XXX : write MIPI_STOP_STATE_STALL ?
*/
intel_de_write(display, MIPI_HIGH_LOW_SWITCH_COUNT(display, port),
intel_dsi->hs_to_lp_count);
/* XXX: low power clock equivalence in terms of byte clock.
* the number of byte clocks occupied in one low power clock .
* based on txbyteclkhs and txclkesc .
* txclkesc time / txbyteclk time * ( 105 + MIPI_STOP_STATE_STALL
* ) / 105 . ? ? ?
*/
intel_de_write(display, MIPI_LP_BYTECLK(display, port),
intel_dsi->lp_byte_clk);
if (display->platform.geminilake) {
intel_de_write(display, MIPI_TLPX_TIME_COUNT(display, port),
intel_dsi->lp_byte_clk);
/* Shadow of DPHY reg */
intel_de_write(display, MIPI_CLK_LANE_TIMING(display, port),
intel_dsi->dphy_reg);
}
/* the bw essential for transmitting 16 long packets containing
* 252 bytes meant for dcs write memory command is programmed in
* this register in terms of byte clocks . based on dsi transfer
* rate and the number of lanes configured the time taken to
* transmit 16 long packets in a dsi stream varies. */
intel_de_write(display, MIPI_DBI_BW_CTRL(display, port),
intel_dsi->bw_timer);
intel_de_write(display, MIPI_CLK_LANE_SWITCH_TIME_CNT(display, port),
intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT | intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
if (is_vid_mode(intel_dsi)) {
u32 fmt = intel_dsi->video_frmt_cfg_bits | IP_TG_CONFIG;
/*
* Some panels might have resolution which is not a
* multiple of 64 like 1366 x 768 . Enable RANDOM
* resolution support for such panels by default .
*/
fmt |= RANDOM_DPI_DISPLAY_RESOLUTION;
switch (intel_dsi->video_mode) {
default :
MISSING_CASE(intel_dsi->video_mode);
fallthrough;
case NON_BURST_SYNC_EVENTS:
fmt |= VIDEO_MODE_NON_BURST_WITH_SYNC_EVENTS;
break ;
case NON_BURST_SYNC_PULSE:
fmt |= VIDEO_MODE_NON_BURST_WITH_SYNC_PULSE;
break ;
case BURST_MODE:
fmt |= VIDEO_MODE_BURST;
break ;
}
intel_de_write(display, MIPI_VIDEO_MODE_FORMAT(display, port), fmt);
}
}
}
static void intel_dsi_unprepare(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
enum port port;
if (display->platform.geminilake)
return ;
for_each_dsi_port(port, intel_dsi->ports) {
/* Panel commands can be sent when clock is in LP11 */
intel_de_write(display, MIPI_DEVICE_READY(display, port), 0 x0);
if (display->platform.geminilake || display->platform.broxton)
bxt_dsi_reset_clocks(encoder, port);
else
vlv_dsi_reset_clocks(encoder, port);
intel_de_write(display, MIPI_EOT_DISABLE(display, port), CLOCKSTOP);
intel_de_rmw(display, MIPI_DSI_FUNC_PRG(display, port), VID_MODE_FORMAT_MASK, 0 );
intel_de_write(display, MIPI_DEVICE_READY(display, port), 0 x1);
}
}
static const struct drm_encoder_funcs intel_dsi_funcs = {
.destroy = intel_encoder_destroy,
};
static enum drm_mode_status vlv_dsi_mode_valid(struct drm_connector *connector,
const struct drm_display_mode *mode)
{
struct intel_display *display = to_intel_display(connector->dev);
if (display->platform.valleyview || display->platform.cherryview) {
enum drm_mode_status status;
status = intel_cpu_transcoder_mode_valid(display, mode);
if (status != MODE_OK)
return status;
}
return intel_dsi_mode_valid(connector, mode);
}
static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = {
.get_modes = intel_dsi_get_modes,
.mode_valid = vlv_dsi_mode_valid,
.atomic_check = intel_digital_connector_atomic_check,
};
static const struct drm_connector_funcs intel_dsi_connector_funcs = {
.detect = intel_panel_detect,
.late_register = intel_connector_register,
.early_unregister = intel_connector_unregister,
.destroy = intel_connector_destroy,
.fill_modes = drm_helper_probe_single_connector_modes,
.atomic_get_property = intel_digital_connector_atomic_get_property,
.atomic_set_property = intel_digital_connector_atomic_set_property,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_duplicate_state = intel_digital_connector_duplicate_state,
};
static void vlv_dsi_add_properties(struct intel_connector *connector)
{
const struct drm_display_mode *fixed_mode =
intel_panel_preferred_fixed_mode(connector);
intel_attach_scaling_mode_property(&connector->base);
drm_connector_set_panel_orientation_with_quirk(&connector->base,
intel_dsi_get_panel_orientation(connector),
fixed_mode->hdisplay,
fixed_mode->vdisplay);
}
#define NS_KHZ_RATIO 1000000
#define PREPARE_CNT_MAX 0 x3F
#define EXIT_ZERO_CNT_MAX 0 x3F
#define CLK_ZERO_CNT_MAX 0 xFF
#define TRAIL_CNT_MAX 0 x1F
static void vlv_dphy_param_init(struct intel_dsi *intel_dsi)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct intel_connector *connector = intel_dsi->attached_connector;
struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
u32 tlpx_ns, extra_byte_count, tlpx_ui;
u32 ui_num, ui_den;
u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
u32 ths_prepare_ns, tclk_trail_ns;
u32 tclk_prepare_clkzero, ths_prepare_hszero;
u32 lp_to_hs_switch, hs_to_lp_switch;
u32 mul;
tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
switch (intel_dsi->lane_count) {
case 1 :
case 2 :
extra_byte_count = 2 ;
break ;
case 3 :
extra_byte_count = 4 ;
break ;
case 4 :
default :
extra_byte_count = 3 ;
break ;
}
/* in Kbps */
ui_num = NS_KHZ_RATIO;
ui_den = intel_dsi_bitrate(intel_dsi);
tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
ths_prepare_hszero = mipi_config->ths_prepare_hszero;
/*
* B060
* LP byte clock = TLPX / ( 8 UI )
*/
intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
/* DDR clock period = 2 * UI
* UI ( sec ) = 1 / ( bitrate * 10 ^ 3 ) ( bitrate is in KHZ )
* UI ( nsec ) = 10 ^ 6 / bitrate
* DDR clock period ( nsec ) = 2 * UI = ( 2 * 10 ^ 6 ) / bitrate
* DDR clock count = ns_value / DDR clock period
*
* For GEMINILAKE dphy_param_reg will be programmed in terms of
* HS byte clock count for other platform in HS ddr clock count
*/
mul = display->platform.geminilake ? 8 : 2 ;
ths_prepare_ns = max(mipi_config->ths_prepare,
mipi_config->tclk_prepare);
/* prepare count */
prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
if (prepare_cnt > PREPARE_CNT_MAX) {
drm_dbg_kms(display->drm, "prepare count too high %u\n" ,
prepare_cnt);
prepare_cnt = PREPARE_CNT_MAX;
}
/* exit zero count */
exit_zero_cnt = DIV_ROUND_UP(
(ths_prepare_hszero - ths_prepare_ns) * ui_den,
ui_num * mul
);
/*
* Exit zero is unified val ths_zero and ths_exit
* minimum value for ths_exit = 110 ns
* min ( exit_zero_cnt * 2 ) = 110 / UI
* exit_zero_cnt = 55 / UI
*/
if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
exit_zero_cnt += 1 ;
if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
drm_dbg_kms(display->drm, "exit zero count too high %u\n" ,
exit_zero_cnt);
exit_zero_cnt = EXIT_ZERO_CNT_MAX;
}
/* clk zero count */
clk_zero_cnt = DIV_ROUND_UP(
(tclk_prepare_clkzero - ths_prepare_ns)
* ui_den, ui_num * mul);
if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
drm_dbg_kms(display->drm, "clock zero count too high %u\n" ,
clk_zero_cnt);
clk_zero_cnt = CLK_ZERO_CNT_MAX;
}
/* trail count */
tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
if (trail_cnt > TRAIL_CNT_MAX) {
drm_dbg_kms(display->drm, "trail count too high %u\n" ,
trail_cnt);
trail_cnt = TRAIL_CNT_MAX;
}
/* B080 */
intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
clk_zero_cnt << 8 | prepare_cnt;
/*
* LP to HS switch count = 4 TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT *
* mul + 10 UI + Extra Byte Count
*
* HS to LP switch count = THS - TRAIL + 2 TLPX + Extra Byte Count
* Extra Byte Count is calculated according to number of lanes .
* High Low Switch Count is the Max of LP to HS and
* HS to LP switch count
*
*/
tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
/* B044 */
/* FIXME:
* The comment above does not match with the code */
lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul +
exit_zero_cnt * mul + 10 , 8 );
hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8 );
intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
intel_dsi->hs_to_lp_count += extra_byte_count;
/* B088 */
/* LP -> HS for clock lanes
* LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
* extra byte count
* 2 TPLX + 1 TLPX + 1 TPLX ( in ns ) + prepare_cnt * 2 + clk_zero_cnt *
* 2 ( in UI ) + extra byte count
* In byteclks = ( 4 TLPX + prepare_cnt * 2 + clk_zero_cnt * 2 ( in UI ) ) /
* 8 + extra byte count
*/
intel_dsi->clk_lp_to_hs_count =
DIV_ROUND_UP(
4 * tlpx_ui + prepare_cnt * 2 +
clk_zero_cnt * 2 ,
8 );
intel_dsi->clk_lp_to_hs_count += extra_byte_count;
/* HS->LP for Clock Lanes
* Low Power clock synchronisations + 1 Tx byteclk + tclk_trail +
* Extra byte count
* 2 TLPX + 8 UI + ( trail_count * 2 ) ( in UI ) + Extra byte count
* In byteclks = ( 2 * TLpx ( in UI ) + trail_count * 2 + 8 ) ( in UI ) / 8 +
* Extra byte count
*/
intel_dsi->clk_hs_to_lp_count =
DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8 ,
8 );
intel_dsi->clk_hs_to_lp_count += extra_byte_count;
intel_dsi_log_params(intel_dsi);
}
int vlv_dsi_min_cdclk(const struct intel_crtc_state *crtc_state)
{
struct intel_display *display = to_intel_display(crtc_state);
if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI))
return 0 ;
/*
* On Valleyview some DSI panels lose ( v | h ) sync when the clock is lower
* than 320000 KHz .
*/
if (display->platform.valleyview)
return 320000 ;
/*
* On Geminilake once the CDCLK gets as low as 79200
* picture gets unstable , despite that values are
* correct for DSI PLL and DE PLL .
*/
if (display->platform.geminilake)
return 158400 ;
return 0 ;
}
typedef void (*vlv_dsi_dmi_quirk_func)(struct intel_dsi *intel_dsi);
/*
* Vtotal is wrong on the Asus TF103C leading to the last line of the display
* being shown as the first line . The factory installed Android has a hardcoded
* modeline , causing it to not suffer from this BIOS bug .
*
* Original mode : " 1280 x800 " : 60 67700 1280 1312 1328 1376 800 808 812 820 0 x8 0 xa
* Fixed mode : " 1280 x800 " : 60 67700 1280 1312 1328 1376 800 808 812 816 0 x8 0 xa
*
* https : //gitlab.freedesktop.org/drm/intel/-/issues/9381
*/
static void vlv_dsi_asus_tf103c_mode_fixup(struct intel_dsi *intel_dsi)
{
/* Cast away the const as we want to fixup the mode */
struct drm_display_mode *fixed_mode = (struct drm_display_mode *)
intel_panel_preferred_fixed_mode(intel_dsi->attached_connector);
if (fixed_mode->vtotal == 820 )
fixed_mode->vtotal -= 4 ;
}
/*
* On the Lenovo Yoga Tablet 2 830 / 1050 there are 2 problems :
* 1 . The I2C MIPI sequence elements reference bus 3 . ACPI has I2C1 - I2C7
* which under Linux become bus 0 - 6 . And the MIPI sequence reference
* to bus 3 is indented for I2C3 which is bus 2 under Linux .
*
* Note mipi_exec_i2c ( ) cannot just subtract 1 from the bus
* given in the I2C MIPI sequence element . Since on other
* devices the I2C bus - numbers used in the MIPI sequences do
* actually start at 0 .
*
* 2 . width_ / height_mm contain a bogus 192 mm x 120 mm size . This is
* especially a problem on the 8 " 830 version which uses a 10 : 16
* portrait screen where as the bogus size is 16 : 10 .
*
* https : //gitlab.freedesktop.org/drm/intel/-/issues/9379
*/
static void vlv_dsi_lenovo_yoga_tab2_size_fixup(struct intel_dsi *intel_dsi)
{
const struct drm_display_mode *fixed_mode =
intel_panel_preferred_fixed_mode(intel_dsi->attached_connector);
struct drm_display_info *info = &intel_dsi->attached_connector->base.display_info;
intel_dsi->i2c_bus_num = 2 ;
/*
* The 10 " 1050 uses a 1920 x1200 landscape screen , where as the 8 " 830
* uses a 1200 x1920 portrait screen .
*/
if (fixed_mode->hdisplay == 1920 ) {
info->width_mm = 216 ;
info->height_mm = 135 ;
} else {
info->width_mm = 107 ;
info->height_mm = 171 ;
}
}
/*
* On the Lenovo Yoga Tab 3 Pro YT3 - X90F there are 2 problems :
* 1 . i2c_acpi_find_adapter ( ) picks the wrong adapter causing mipi_exec_i2c ( )
* to not work . Fix this by setting i2c_bus_num .
* 2 . There is no backlight off MIPI sequence , causing the backlight to stay on .
* Add a backlight off sequence mirroring the existing backlight on sequence .
*
* https : //gitlab.freedesktop.org/drm/intel/-/issues/9380
*/
static void vlv_dsi_lenovo_yoga_tab3_backlight_fixup(struct intel_dsi *intel_dsi)
{
static const u8 backlight_off_sequence[16 ] = {
/* Header Seq-id 7, length after header 11 bytes */
0 x07, 0 x0b, 0 x00, 0 x00, 0 x00,
/* MIPI_SEQ_ELEM_I2C bus 0 addr 0x2c reg 0x00 data-len 1 data 0x00 */
0 x04, 0 x08, 0 x00, 0 x00, 0 x00, 0 x2c, 0 x00, 0 x00, 0 x01, 0 x00,
/* MIPI_SEQ_ELEM_END */
0 x00
};
struct intel_connector *connector = intel_dsi->attached_connector;
intel_dsi->i2c_bus_num = 0 ;
connector->panel.vbt.dsi.sequence[MIPI_SEQ_BACKLIGHT_OFF] = backlight_off_sequence;
}
static const struct dmi_system_id vlv_dsi_dmi_quirk_table[] = {
{
/* Asus Transformer Pad TF103C */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ),
DMI_MATCH(DMI_PRODUCT_NAME, "TF103C" ),
},
.driver_data = (void *)vlv_dsi_asus_tf103c_mode_fixup,
},
{
/*
* Lenovo Yoga Tablet 2 830 F / L or 1050 F / L ( The 8 " and 10 "
* Lenovo Yoga Tablet 2 use the same mainboard )
*/
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp." ),
DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM" ),
DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8" ),
/* Partial match on beginning of BIOS version */
DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21" ),
},
.driver_data = (void *)vlv_dsi_lenovo_yoga_tab2_size_fixup,
},
{
/* Lenovo Yoga Tab 3 Pro YT3-X90F */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation" ),
DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001" ),
},
.driver_data = (void *)vlv_dsi_lenovo_yoga_tab3_backlight_fixup,
},
{ }
};
void vlv_dsi_init(struct intel_display *display)
{
struct intel_dsi *intel_dsi;
struct intel_encoder *encoder;
struct intel_connector *connector;
struct drm_display_mode *current_mode;
const struct dmi_system_id *dmi_id;
enum port port;
enum pipe pipe;
drm_dbg_kms(display->drm, "\n" );
/* There is no detection method for MIPI so rely on VBT */
if (!intel_bios_is_dsi_present(display, &port))
return ;
if (display->platform.geminilake || display->platform.broxton)
display->dsi.mmio_base = BXT_MIPI_BASE;
else
display->dsi.mmio_base = VLV_MIPI_BASE;
intel_dsi = kzalloc(sizeof (*intel_dsi), GFP_KERNEL);
if (!intel_dsi)
return ;
connector = intel_connector_alloc();
if (!connector) {
kfree(intel_dsi);
return ;
}
encoder = &intel_dsi->base;
intel_dsi->attached_connector = connector;
drm_encoder_init(display->drm, &encoder->base, &intel_dsi_funcs,
DRM_MODE_ENCODER_DSI, "DSI %c" , port_name(port));
encoder->compute_config = intel_dsi_compute_config;
encoder->pre_enable = intel_dsi_pre_enable;
if (display->platform.geminilake || display->platform.broxton)
encoder->enable = bxt_dsi_enable;
encoder->disable = intel_dsi_disable;
encoder->post_disable = intel_dsi_post_disable;
encoder->get_hw_state = intel_dsi_get_hw_state;
encoder->get_config = intel_dsi_get_config;
encoder->update_pipe = intel_backlight_update;
encoder->shutdown = intel_dsi_shutdown;
connector->get_hw_state = intel_connector_get_hw_state;
encoder->port = port;
encoder->type = INTEL_OUTPUT_DSI;
encoder->power_domain = POWER_DOMAIN_PORT_DSI;
encoder->cloneable = 0 ;
/*
* On BYT / CHV , pipe A maps to MIPI DSI port A , pipe B maps to MIPI DSI
* port C . BXT isn ' t limited like this .
*/
if (display->platform.geminilake || display->platform.broxton)
encoder->pipe_mask = ~0 ;
else if (port == PORT_A)
encoder->pipe_mask = BIT(PIPE_A);
else
encoder->pipe_mask = BIT(PIPE_B);
intel_dsi->panel_power_off_time = ktime_get_boottime();
intel_bios_init_panel_late(display, &connector->panel, NULL, NULL);
if (connector->panel.vbt.dsi.config->dual_link)
intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
else
intel_dsi->ports = BIT(port);
if (drm_WARN_ON(display->drm, connector->panel.vbt.dsi.bl_ports & ~intel_dsi->ports))
connector->panel.vbt.dsi.bl_ports &= intel_dsi->ports;
if (drm_WARN_ON(display->drm, connector->panel.vbt.dsi.cabc_ports & ~intel_dsi->ports))
connector->panel.vbt.dsi.cabc_ports &= intel_dsi->ports;
/* Create a DSI host (and a device) for each port. */
for_each_dsi_port(port, intel_dsi->ports) {
struct intel_dsi_host *host;
host = intel_dsi_host_init(intel_dsi, &intel_dsi_host_ops,
port);
if (!host)
goto err;
intel_dsi->dsi_hosts[port] = host;
}
if (!intel_dsi_vbt_init(intel_dsi, MIPI_DSI_GENERIC_PANEL_ID)) {
drm_dbg_kms(display->drm, "no device found\n" );
goto err;
}
/* Use clock read-back from current hw-state for fastboot */
current_mode = intel_encoder_current_mode(encoder);
if (current_mode) {
drm_dbg_kms(display->drm, "Calculated pclk %d GOP %d\n" ,
intel_dsi->pclk, current_mode->clock);
if (intel_fuzzy_clock_check(intel_dsi->pclk,
current_mode->clock)) {
drm_dbg_kms(display->drm, "Using GOP pclk\n" );
intel_dsi->pclk = current_mode->clock;
}
kfree(current_mode);
}
vlv_dphy_param_init(intel_dsi);
intel_dsi_vbt_gpio_init(intel_dsi,
intel_dsi_get_hw_state(encoder, &pipe));
drm_connector_init(display->drm, &connector->base, &intel_dsi_connector_funcs,
DRM_MODE_CONNECTOR_DSI);
drm_connector_helper_add(&connector->base, &intel_dsi_connector_helper_funcs);
connector->base.display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/
intel_connector_attach_encoder(connector, encoder);
mutex_lock(&display->drm->mode_config.mutex);
intel_panel_add_vbt_lfp_fixed_mode(connector);
mutex_unlock(&display->drm->mode_config.mutex);
if (!intel_panel_preferred_fixed_mode(connector)) {
drm_dbg_kms(display->drm, "no fixed mode\n" );
goto err_cleanup_connector;
}
dmi_id = dmi_first_match(vlv_dsi_dmi_quirk_table);
if (dmi_id) {
vlv_dsi_dmi_quirk_func quirk_func =
(vlv_dsi_dmi_quirk_func)dmi_id->driver_data;
quirk_func(intel_dsi);
}
intel_panel_init(connector, NULL);
intel_backlight_setup(connector, INVALID_PIPE);
vlv_dsi_add_properties(connector);
return ;
err_cleanup_connector:
drm_connector_cleanup(&connector->base);
err:
drm_encoder_cleanup(&encoder->base);
kfree(intel_dsi);
kfree(connector);
}
Messung V0.5 in Prozent C=94 H=98 G=95
¤ Dauer der Verarbeitung: 0.47 Sekunden
(vorverarbeitet am 2026-10-03)
¤
*© Formatika GbR, Deutschland