/*
* Copyright © 2014 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 : Shobhit Kumar < shobhit . kumar @ intel . com >
*
*/
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/mfd/intel_soc_pmic.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>
#include <linux/unaligned.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_print.h>
#include <video/mipi_display.h>
#include "i915_utils.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_gmbus_regs.h"
#include "intel_pps_regs.h"
#include "vlv_dsi.h"
#include "vlv_dsi_regs.h"
#include "vlv_sideband.h"
#define MIPI_TRANSFER_MODE_SHIFT 0
#define MIPI_VIRTUAL_CHANNEL_SHIFT 1
#define MIPI_PORT_SHIFT 3
struct i2c_adapter_lookup {
u16 target_addr;
struct intel_dsi *intel_dsi;
acpi_handle dev_handle;
};
#define CHV_GPIO_IDX_START_N 0
#define CHV_GPIO_IDX_START_E 73
#define CHV_GPIO_IDX_START_SW 100
#define CHV_GPIO_IDX_START_SE 198
/* ICL DSI Display GPIO Pins */
#define ICL_GPIO_DDSP_HPD_A 0
#define ICL_GPIO_L_VDDEN_1 1
#define ICL_GPIO_L_BKLTEN_1 2
#define ICL_GPIO_DDPA_CTRLCLK_1 3
#define ICL_GPIO_DDPA_CTRLDATA_1 4
#define ICL_GPIO_DDSP_HPD_B 5
#define ICL_GPIO_L_VDDEN_2 6
#define ICL_GPIO_L_BKLTEN_2 7
#define ICL_GPIO_DDPA_CTRLCLK_2 8
#define ICL_GPIO_DDPA_CTRLDATA_2 9
static enum port intel_dsi_seq_port_to_port(struct intel_dsi *intel_dsi,
u8 seq_port)
{
/*
* If single link DSI is being used on any port , the VBT sequence block
* send packet apparently always has 0 for the port . Just use the port
* we have configured , and ignore the sequence block port .
*/
if (hweight8(intel_dsi->ports) == 1 )
return ffs(intel_dsi->ports) - 1 ;
if (seq_port) {
if (intel_dsi->ports & BIT(PORT_B))
return PORT_B;
if (intel_dsi->ports & BIT(PORT_C))
return PORT_C;
}
return PORT_A;
}
static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct mipi_dsi_device *dsi_device;
u8 type, flags, seq_port;
u16 len;
enum port port;
drm_dbg_kms(display->drm, "\n" );
flags = *data++;
type = *data++;
len = *((u16 *) data);
data += 2 ;
seq_port = (flags >> MIPI_PORT_SHIFT) & 3 ;
port = intel_dsi_seq_port_to_port(intel_dsi, seq_port);
if (drm_WARN_ON(display->drm, !intel_dsi->dsi_hosts[port]))
goto out;
dsi_device = intel_dsi->dsi_hosts[port]->device;
if (!dsi_device) {
drm_dbg_kms(display->drm, "no dsi device for port %c\n" ,
port_name(port));
goto out;
}
if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1 )
dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM;
else
dsi_device->mode_flags |= MIPI_DSI_MODE_LPM;
dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3 ;
switch (type) {
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
mipi_dsi_generic_write(dsi_device, NULL, 0 );
break ;
case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
mipi_dsi_generic_write(dsi_device, data, 1 );
break ;
case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
mipi_dsi_generic_write(dsi_device, data, 2 );
break ;
case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
drm_dbg_kms(display->drm, "Generic Read not yet implemented or used\n" );
break ;
case MIPI_DSI_GENERIC_LONG_WRITE:
mipi_dsi_generic_write(dsi_device, data, len);
break ;
case MIPI_DSI_DCS_SHORT_WRITE:
mipi_dsi_dcs_write_buffer(dsi_device, data, 1 );
break ;
case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
mipi_dsi_dcs_write_buffer(dsi_device, data, 2 );
break ;
case MIPI_DSI_DCS_READ:
drm_dbg_kms(display->drm, "DCS Read not yet implemented or used\n" );
break ;
case MIPI_DSI_DCS_LONG_WRITE:
mipi_dsi_dcs_write_buffer(dsi_device, data, len);
break ;
}
if (DISPLAY_VER(display) < 11 )
vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
out:
data += len;
return data;
}
static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
u32 delay = *((const u32 *) data);
drm_dbg_kms(display->drm, "%d usecs\n" , delay);
usleep_range(delay, delay + 10 );
data += 4 ;
return data;
}
static void soc_gpio_set_value(struct intel_connector *connector, u8 gpio_index,
const char *con_id, u8 idx, bool value)
{
struct intel_display *display = to_intel_display(connector);
/* XXX: this table is a quick ugly hack. */
static struct gpio_desc *soc_gpio_table[U8_MAX + 1 ];
struct gpio_desc *gpio_desc = soc_gpio_table[gpio_index];
if (gpio_desc) {
gpiod_set_value(gpio_desc, value);
} else {
gpio_desc = devm_gpiod_get_index(display->drm->dev, con_id, idx,
value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
if (IS_ERR(gpio_desc)) {
drm_err(display->drm,
"GPIO index %u request failed (%pe)\n" ,
gpio_index, gpio_desc);
return ;
}
soc_gpio_table[gpio_index] = gpio_desc;
}
}
static void soc_opaque_gpio_set_value(struct intel_connector *connector,
u8 gpio_index, const char *chip,
const char *con_id, u8 idx, bool value)
{
struct gpiod_lookup_table *lookup;
lookup = kzalloc(struct_size(lookup, table, 2 ), GFP_KERNEL);
if (!lookup)
return ;
lookup->dev_id = "0000:00:02.0" ;
lookup->table[0 ] =
GPIO_LOOKUP_IDX(chip, idx, con_id, idx, GPIO_ACTIVE_HIGH);
gpiod_add_lookup_table(lookup);
soc_gpio_set_value(connector, gpio_index, con_id, idx, value);
gpiod_remove_lookup_table(lookup);
kfree(lookup);
}
static void vlv_gpio_set_value(struct intel_connector *connector,
u8 gpio_source, u8 gpio_index, bool value)
{
struct intel_display *display = to_intel_display(connector);
/* XXX: this assumes vlv_gpio_table only has NC GPIOs. */
if (connector->panel.vbt.dsi.seq_version < 3 ) {
if (gpio_source == 1 ) {
drm_dbg_kms(display->drm, "SC gpio not supported\n" );
return ;
}
if (gpio_source > 1 ) {
drm_dbg_kms(display->drm,
"unknown gpio source %u\n" , gpio_source);
return ;
}
}
soc_opaque_gpio_set_value(connector, gpio_index,
"INT33FC:01" , "Panel N" , gpio_index, value);
}
static void chv_gpio_set_value(struct intel_connector *connector,
u8 gpio_source, u8 gpio_index, bool value)
{
struct intel_display *display = to_intel_display(connector);
if (connector->panel.vbt.dsi.seq_version >= 3 ) {
if (gpio_index >= CHV_GPIO_IDX_START_SE) {
/* XXX: it's unclear whether 255->57 is part of SE. */
soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:03" , "Panel SE" ,
gpio_index - CHV_GPIO_IDX_START_SE, value);
} else if (gpio_index >= CHV_GPIO_IDX_START_SW) {
soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:00" , "Panel SW" ,
gpio_index - CHV_GPIO_IDX_START_SW, value);
} else if (gpio_index >= CHV_GPIO_IDX_START_E) {
soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:02" , "Panel E" ,
gpio_index - CHV_GPIO_IDX_START_E, value);
} else {
soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:01" , "Panel N" ,
gpio_index - CHV_GPIO_IDX_START_N, value);
}
} else {
/* XXX: The spec is unclear about CHV GPIO on seq v2 */
if (gpio_source != 0 ) {
drm_dbg_kms(display->drm,
"unknown gpio source %u\n" , gpio_source);
return ;
}
if (gpio_index >= CHV_GPIO_IDX_START_E) {
drm_dbg_kms(display->drm,
"invalid gpio index %u for GPIO N\n" ,
gpio_index);
return ;
}
soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:01" , "Panel N" ,
gpio_index - CHV_GPIO_IDX_START_N, value);
}
}
static void bxt_gpio_set_value(struct intel_connector *connector,
u8 gpio_index, bool value)
{
soc_gpio_set_value(connector, gpio_index, NULL, gpio_index, value);
}
enum {
MIPI_RESET_1 = 0 ,
MIPI_AVDD_EN_1,
MIPI_BKLT_EN_1,
MIPI_AVEE_EN_1,
MIPI_VIO_EN_1,
MIPI_RESET_2,
MIPI_AVDD_EN_2,
MIPI_BKLT_EN_2,
MIPI_AVEE_EN_2,
MIPI_VIO_EN_2,
};
static void icl_native_gpio_set_value(struct intel_display *display,
int gpio, bool value)
{
int index;
if (drm_WARN_ON(display->drm, DISPLAY_VER(display) == 11 && gpio >= MIPI_RESET_2))
return ;
switch (gpio) {
case MIPI_RESET_1:
case MIPI_RESET_2:
index = gpio == MIPI_RESET_1 ? HPD_PORT_A : HPD_PORT_B;
/*
* Disable HPD to set the pin to output , and set output
* value . The HPD pin should not be enabled for DSI anyway ,
* assuming the board design and VBT are sane , and the pin isn ' t
* used by a non - DSI encoder .
*
* The locking protects against concurrent SHOTPLUG_CTL_DDI
* modifications in irq setup and handling .
*/
spin_lock_irq(&display->irq.lock);
intel_de_rmw(display, SHOTPLUG_CTL_DDI,
SHOTPLUG_CTL_DDI_HPD_ENABLE(index) |
SHOTPLUG_CTL_DDI_HPD_OUTPUT_DATA(index),
value ? SHOTPLUG_CTL_DDI_HPD_OUTPUT_DATA(index) : 0 );
spin_unlock_irq(&display->irq.lock);
break ;
case MIPI_AVDD_EN_1:
case MIPI_AVDD_EN_2:
index = gpio == MIPI_AVDD_EN_1 ? 0 : 1 ;
intel_de_rmw(display, PP_CONTROL(display, index), PANEL_POWER_ON,
value ? PANEL_POWER_ON : 0 );
break ;
case MIPI_BKLT_EN_1:
case MIPI_BKLT_EN_2:
index = gpio == MIPI_BKLT_EN_1 ? 0 : 1 ;
intel_de_rmw(display, PP_CONTROL(display, index), EDP_BLC_ENABLE,
value ? EDP_BLC_ENABLE : 0 );
break ;
case MIPI_AVEE_EN_1:
case MIPI_AVEE_EN_2:
index = gpio == MIPI_AVEE_EN_1 ? 1 : 2 ;
intel_de_rmw(display, GPIO(display, index),
GPIO_CLOCK_VAL_OUT,
GPIO_CLOCK_DIR_MASK | GPIO_CLOCK_DIR_OUT |
GPIO_CLOCK_VAL_MASK | (value ? GPIO_CLOCK_VAL_OUT : 0 ));
break ;
case MIPI_VIO_EN_1:
case MIPI_VIO_EN_2:
index = gpio == MIPI_VIO_EN_1 ? 1 : 2 ;
intel_de_rmw(display, GPIO(display, index),
GPIO_DATA_VAL_OUT,
GPIO_DATA_DIR_MASK | GPIO_DATA_DIR_OUT |
GPIO_DATA_VAL_MASK | (value ? GPIO_DATA_VAL_OUT : 0 ));
break ;
default :
MISSING_CASE(gpio);
}
}
static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct intel_connector *connector = intel_dsi->attached_connector;
u8 gpio_source = 0 , gpio_index = 0 , gpio_number;
bool value;
int size;
bool native = DISPLAY_VER(display) >= 11 ;
if (connector->panel.vbt.dsi.seq_version >= 3 ) {
size = 3 ;
gpio_index = data[0 ];
gpio_number = data[1 ];
value = data[2 ] & BIT(0 );
if (connector->panel.vbt.dsi.seq_version >= 4 && data[2 ] & BIT(1 ))
native = false ;
} else {
size = 2 ;
gpio_number = data[0 ];
value = data[1 ] & BIT(0 );
if (connector->panel.vbt.dsi.seq_version == 2 )
gpio_source = (data[1 ] >> 1 ) & 3 ;
}
drm_dbg_kms(display->drm, "GPIO index %u, number %u, source %u, native %s, set to %s\n" ,
gpio_index, gpio_number, gpio_source, str_yes_no(native), str_on_off(value));
if (native)
icl_native_gpio_set_value(display, gpio_number, value);
else if (DISPLAY_VER(display) >= 9 )
bxt_gpio_set_value(connector, gpio_index, value);
else if (display->platform.valleyview)
vlv_gpio_set_value(connector, gpio_source, gpio_number, value);
else if (display->platform.cherryview)
chv_gpio_set_value(connector, gpio_source, gpio_number, value);
return data + size;
}
#ifdef CONFIG_ACPI
static int i2c_adapter_lookup(struct acpi_resource *ares, void *data)
{
struct i2c_adapter_lookup *lookup = data;
struct intel_dsi *intel_dsi = lookup->intel_dsi;
struct acpi_resource_i2c_serialbus *sb;
struct i2c_adapter *adapter;
acpi_handle adapter_handle;
acpi_status status;
if (!i2c_acpi_get_i2c_resource(ares, &sb))
return 1 ;
if (lookup->target_addr != sb->slave_address)
return 1 ;
status = acpi_get_handle(lookup->dev_handle,
sb->resource_source.string_ptr,
&adapter_handle);
if (ACPI_FAILURE(status))
return 1 ;
adapter = i2c_acpi_find_adapter_by_handle(adapter_handle);
if (adapter)
intel_dsi->i2c_bus_num = adapter->nr;
return 1 ;
}
static void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi,
const u16 target_addr)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct acpi_device *adev = ACPI_COMPANION(display->drm->dev);
struct i2c_adapter_lookup lookup = {
.target_addr = target_addr,
.intel_dsi = intel_dsi,
.dev_handle = acpi_device_handle(adev),
};
LIST_HEAD(resource_list);
acpi_dev_get_resources(adev, &resource_list, i2c_adapter_lookup, &lookup);
acpi_dev_free_resource_list(&resource_list);
}
#else
static inline void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi,
const u16 target_addr)
{
}
#endif
static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct i2c_adapter *adapter;
struct i2c_msg msg;
int ret;
u8 vbt_i2c_bus_num = *(data + 2 );
u16 target_addr = *(u16 *)(data + 3 );
u8 reg_offset = *(data + 5 );
u8 payload_size = *(data + 6 );
u8 *payload_data;
drm_dbg_kms(display->drm, "bus %d target-addr 0x%02x reg 0x%02x data %*ph\n" ,
vbt_i2c_bus_num, target_addr, reg_offset, payload_size, data + 7 );
if (intel_dsi->i2c_bus_num < 0 ) {
intel_dsi->i2c_bus_num = vbt_i2c_bus_num;
i2c_acpi_find_adapter(intel_dsi, target_addr);
}
adapter = i2c_get_adapter(intel_dsi->i2c_bus_num);
if (!adapter) {
drm_err(display->drm, "Cannot find a valid i2c bus for xfer\n" );
goto err_bus;
}
payload_data = kzalloc(payload_size + 1 , GFP_KERNEL);
if (!payload_data)
goto err_alloc;
payload_data[0 ] = reg_offset;
memcpy(&payload_data[1 ], (data + 7 ), payload_size);
msg.addr = target_addr;
msg.flags = 0 ;
msg.len = payload_size + 1 ;
msg.buf = payload_data;
ret = i2c_transfer(adapter, &msg, 1 );
if (ret < 0 )
drm_err(display->drm,
"Failed to xfer payload of size (%u) to reg (%u)\n" ,
payload_size, reg_offset);
kfree(payload_data);
err_alloc:
i2c_put_adapter(adapter);
err_bus:
return data + payload_size + 7 ;
}
static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
drm_dbg_kms(display->drm, "Skipping SPI element execution\n" );
return data + *(data + 5 ) + 6 ;
}
static const u8 *mipi_exec_pmic(struct intel_dsi *intel_dsi, const u8 *data)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
#ifdef CONFIG_PMIC_OPREGION
u32 value, mask, reg_address;
u16 i2c_address;
int ret;
/* byte 0 aka PMIC Flag is reserved */
i2c_address = get_unaligned_le16(data + 1 );
reg_address = get_unaligned_le32(data + 3 );
value = get_unaligned_le32(data + 7 );
mask = get_unaligned_le32(data + 11 );
ret = intel_soc_pmic_exec_mipi_pmic_seq_element(i2c_address,
reg_address,
value, mask);
if (ret)
drm_err(display->drm, "%s failed, error: %d\n" , __func__, ret);
#else
drm_err(display->drm,
"Your hardware requires CONFIG_PMIC_OPREGION and it is not set\n" );
#endif
return data + 15 ;
}
typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi,
const u8 *data);
static const fn_mipi_elem_exec exec_elem[] = {
[MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet,
[MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay,
[MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio,
[MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c,
[MIPI_SEQ_ELEM_SPI] = mipi_exec_spi,
[MIPI_SEQ_ELEM_PMIC] = mipi_exec_pmic,
};
/*
* MIPI Sequence from VBT # 53 parsing logic
* We have already separated each sequence during bios parsing
* Following is generic execution function for any sequence
*/
static const char * const seq_name[] = {
[MIPI_SEQ_END] = "MIPI_SEQ_END" ,
[MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET" ,
[MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP" ,
[MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON" ,
[MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF" ,
[MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET" ,
[MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON" ,
[MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF" ,
[MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON" ,
[MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF" ,
[MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON" ,
[MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF" ,
};
static const char *sequence_name(enum mipi_seq seq_id)
{
if (seq_id < ARRAY_SIZE(seq_name))
return seq_name[seq_id];
return "(unknown)" ;
}
static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi,
enum mipi_seq seq_id)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct intel_connector *connector = intel_dsi->attached_connector;
const u8 *data;
fn_mipi_elem_exec mipi_elem_exec;
if (drm_WARN_ON(display->drm,
seq_id >= ARRAY_SIZE(connector->panel.vbt.dsi.sequence)))
return ;
data = connector->panel.vbt.dsi.sequence[seq_id];
if (!data)
return ;
drm_WARN_ON(display->drm, *data != seq_id);
drm_dbg_kms(display->drm, "Starting MIPI sequence %d - %s\n" ,
seq_id, sequence_name(seq_id));
/* Skip Sequence Byte. */
data++;
/* Skip Size of Sequence. */
if (connector->panel.vbt.dsi.seq_version >= 3 )
data += 4 ;
while (*data != MIPI_SEQ_ELEM_END) {
u8 operation_byte = *data++;
u8 operation_size = 0 ;
if (operation_byte < ARRAY_SIZE(exec_elem))
mipi_elem_exec = exec_elem[operation_byte];
else
mipi_elem_exec = NULL;
/* Size of Operation. */
if (connector->panel.vbt.dsi.seq_version >= 3 )
operation_size = *data++;
if (mipi_elem_exec) {
const u8 *next = data + operation_size;
data = mipi_elem_exec(intel_dsi, data);
/* Consistency check if we have size. */
if (operation_size && data != next) {
drm_err(display->drm,
"Inconsistent operation size\n" );
return ;
}
} else if (operation_size) {
/* We have size, skip. */
drm_dbg_kms(display->drm,
"Unsupported MIPI operation byte %u\n" ,
operation_byte);
data += operation_size;
} else {
/* No size, can't skip without parsing. */
drm_err(display->drm,
"Unsupported MIPI operation byte %u\n" ,
operation_byte);
return ;
}
}
}
void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
enum mipi_seq seq_id)
{
if (seq_id == MIPI_SEQ_POWER_ON && intel_dsi->gpio_panel)
gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1 );
if (seq_id == MIPI_SEQ_BACKLIGHT_ON && intel_dsi->gpio_backlight)
gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 1 );
intel_dsi_vbt_exec(intel_dsi, seq_id);
if (seq_id == MIPI_SEQ_POWER_OFF && intel_dsi->gpio_panel)
gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0 );
if (seq_id == MIPI_SEQ_BACKLIGHT_OFF && intel_dsi->gpio_backlight)
gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 0 );
}
void intel_dsi_log_params(struct intel_dsi *intel_dsi)
{
struct intel_display *display = to_intel_display(&intel_dsi->base);
struct drm_printer p = drm_dbg_printer(display->drm, DRM_UT_KMS,
"DSI parameters:" );
drm_printf(&p, "Pclk %d\n" , intel_dsi->pclk);
drm_printf(&p, "Pixel overlap %d\n" , intel_dsi->pixel_overlap);
drm_printf(&p, "Lane count %d\n" , intel_dsi->lane_count);
drm_printf(&p, "DPHY param reg 0x%x\n" , intel_dsi->dphy_reg);
drm_printf(&p, "Video mode format %s\n" ,
intel_dsi->video_mode == NON_BURST_SYNC_PULSE ?
"non-burst with sync pulse" :
intel_dsi->video_mode == NON_BURST_SYNC_EVENTS ?
"non-burst with sync events" :
intel_dsi->video_mode == BURST_MODE ?
"burst" : "<unknown>" );
drm_printf(&p, "Burst mode ratio %d\n" , intel_dsi->burst_mode_ratio);
drm_printf(&p, "Reset timer %d\n" , intel_dsi->rst_timer_val);
drm_printf(&p, "Eot %s\n" , str_enabled_disabled(intel_dsi->eotp_pkt));
drm_printf(&p, "Clockstop %s\n" , str_enabled_disabled(!intel_dsi->clock_stop));
drm_printf(&p, "Mode %s\n" , intel_dsi->operation_mode ? "command" : "video" );
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
drm_printf(&p, "Dual link: DSI_DUAL_LINK_FRONT_BACK\n" );
else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT)
drm_printf(&p, "Dual link: DSI_DUAL_LINK_PIXEL_ALT\n" );
else
drm_printf(&p, "Dual link: NONE\n" );
drm_printf(&p, "Pixel Format %d\n" , intel_dsi->pixel_format);
drm_printf(&p, "TLPX %d\n" , intel_dsi->escape_clk_div);
drm_printf(&p, "LP RX Timeout 0x%x\n" , intel_dsi->lp_rx_timeout);
drm_printf(&p, "Turnaround Timeout 0x%x\n" , intel_dsi->turn_arnd_val);
drm_printf(&p, "Init Count 0x%x\n" , intel_dsi->init_count);
drm_printf(&p, "HS to LP Count 0x%x\n" , intel_dsi->hs_to_lp_count);
drm_printf(&p, "LP Byte Clock %d\n" , intel_dsi->lp_byte_clk);
drm_printf(&p, "DBI BW Timer 0x%x\n" , intel_dsi->bw_timer);
drm_printf(&p, "LP to HS Clock Count 0x%x\n" , intel_dsi->clk_lp_to_hs_count);
drm_printf(&p, "HS to LP Clock Count 0x%x\n" , intel_dsi->clk_hs_to_lp_count);
drm_printf(&p, "BTA %s\n" ,
str_enabled_disabled(!(intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA)));
}
static enum mipi_dsi_pixel_format vbt_to_dsi_pixel_format(unsigned int format)
{
switch (format) {
case PIXEL_FORMAT_RGB888:
return MIPI_DSI_FMT_RGB888;
case PIXEL_FORMAT_RGB666_LOOSELY_PACKED:
return MIPI_DSI_FMT_RGB666;
case PIXEL_FORMAT_RGB666:
return MIPI_DSI_FMT_RGB666_PACKED;
case PIXEL_FORMAT_RGB565:
return MIPI_DSI_FMT_RGB565;
default :
MISSING_CASE(format);
return MIPI_DSI_FMT_RGB666;
}
}
bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
{
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;
struct mipi_pps_data *pps = connector->panel.vbt.dsi.pps;
struct drm_display_mode *mode = connector->panel.vbt.lfp_vbt_mode;
u16 burst_mode_ratio;
enum port port;
drm_dbg_kms(display->drm, "\n" );
intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1 ;
intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0 ;
intel_dsi->lane_count = mipi_config->lane_cnt + 1 ;
intel_dsi->pixel_format =
vbt_to_dsi_pixel_format(mipi_config->videomode_color_format);
intel_dsi->dual_link = mipi_config->dual_link;
intel_dsi->pixel_overlap = mipi_config->pixel_overlap;
intel_dsi->operation_mode = mipi_config->is_cmd_mode;
intel_dsi->video_mode = mipi_config->video_transfer_mode;
intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
intel_dsi->hs_tx_timeout = mipi_config->hs_tx_timeout;
intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
intel_dsi->init_count = mipi_config->master_init_timer;
intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
intel_dsi->video_frmt_cfg_bits =
mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0 ;
intel_dsi->bgr_enabled = mipi_config->rgb_flip;
/* Starting point, adjusted depending on dual link and burst mode */
intel_dsi->pclk = mode->clock;
/* In dual link mode each port needs half of pixel clock */
if (intel_dsi->dual_link) {
intel_dsi->pclk /= 2 ;
/* we can enable pixel_overlap if needed by panel. In this
* case we need to increase the pixelclock for extra pixels
*/
if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
intel_dsi->pclk += DIV_ROUND_UP(mode->vtotal * intel_dsi->pixel_overlap * 60 , 1000 );
}
}
/* Burst Mode Ratio
* Target ddr frequency from VBT / non burst ddr freq
* multiply by 100 to preserve remainder
*/
if (intel_dsi->video_mode == BURST_MODE) {
u32 bitrate;
if (mipi_config->target_burst_mode_freq == 0 ) {
drm_err(display->drm, "Burst mode target is not set\n" );
return false ;
}
bitrate = intel_dsi_bitrate(intel_dsi);
/*
* Sometimes the VBT contains a slightly lower clock , then
* the bitrate we have calculated , in this case just replace it
* with the calculated bitrate .
*/
if (mipi_config->target_burst_mode_freq < bitrate &&
intel_fuzzy_clock_check(mipi_config->target_burst_mode_freq,
bitrate))
mipi_config->target_burst_mode_freq = bitrate;
if (mipi_config->target_burst_mode_freq < bitrate) {
drm_err(display->drm, "Burst mode freq is less than computed\n" );
return false ;
}
burst_mode_ratio =
DIV_ROUND_UP(mipi_config->target_burst_mode_freq * 100 , bitrate);
intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100 );
} else
burst_mode_ratio = 100 ;
intel_dsi->burst_mode_ratio = burst_mode_ratio;
/* delays in VBT are in unit of 100us, so need to convert
* here in ms
* Delay (100us) * 100 /1000 = Delay / 10 (ms) */
intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10 ;
intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10 ;
intel_dsi->panel_on_delay = pps->panel_on_delay / 10 ;
intel_dsi->panel_off_delay = pps->panel_off_delay / 10 ;
intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10 ;
intel_dsi->i2c_bus_num = -1 ;
/* a regular driver would get the device in probe */
for_each_dsi_port(port, intel_dsi->ports) {
mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device);
}
return true ;
}
/*
* On some BYT / CHT devs some sequences are incomplete and we need to manually
* control some GPIOs . We need to add a GPIO lookup table before we get these .
* If the GOP did not initialize the panel ( HDMI inserted ) we may need to also
* change the pinmux for the SoC ' s PWM0 pin from GPIO to PWM .
*/
static struct gpiod_lookup_table pmic_panel_gpio_table = {
/* Intel GFX is consumer */
.dev_id = "0000:00:02.0" ,
.table = {
/* Panel EN/DISABLE */
GPIO_LOOKUP("gpio_crystalcove" , 94 , "panel" , GPIO_ACTIVE_HIGH),
{ }
},
};
static struct gpiod_lookup_table soc_panel_gpio_table = {
.dev_id = "0000:00:02.0" ,
.table = {
GPIO_LOOKUP("INT33FC:01" , 10 , "backlight" , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP("INT33FC:01" , 11 , "panel" , GPIO_ACTIVE_HIGH),
{ }
},
};
static const struct pinctrl_map soc_pwm_pinctrl_map[] = {
PIN_MAP_MUX_GROUP("0000:00:02.0" , "soc_pwm0" , "INT33FC:00" ,
"pwm0_grp" , "pwm" ),
};
void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
{
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;
enum gpiod_flags flags = panel_is_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
struct gpiod_lookup_table *gpiod_lookup_table = NULL;
bool want_backlight_gpio = false ;
bool want_panel_gpio = false ;
struct pinctrl *pinctrl;
int ret;
if ((display->platform.valleyview || display->platform.cherryview) &&
mipi_config->pwm_blc == PPS_BLC_PMIC) {
gpiod_lookup_table = &pmic_panel_gpio_table;
want_panel_gpio = true ;
}
if (display->platform.valleyview && mipi_config->pwm_blc == PPS_BLC_SOC) {
gpiod_lookup_table = &soc_panel_gpio_table;
want_panel_gpio = true ;
want_backlight_gpio = true ;
/* Ensure PWM0 pin is muxed as PWM instead of GPIO */
ret = pinctrl_register_mappings(soc_pwm_pinctrl_map,
ARRAY_SIZE(soc_pwm_pinctrl_map));
if (ret)
drm_err(display->drm,
"Failed to register pwm0 pinmux mapping\n" );
pinctrl = devm_pinctrl_get_select(display->drm->dev, "soc_pwm0" );
if (IS_ERR(pinctrl))
drm_err(display->drm,
"Failed to set pinmux to PWM\n" );
}
if (gpiod_lookup_table)
gpiod_add_lookup_table(gpiod_lookup_table);
if (want_panel_gpio) {
intel_dsi->gpio_panel = devm_gpiod_get(display->drm->dev, "panel" , flags);
if (IS_ERR(intel_dsi->gpio_panel)) {
drm_err(display->drm,
"Failed to own gpio for panel control\n" );
intel_dsi->gpio_panel = NULL;
}
}
if (want_backlight_gpio) {
intel_dsi->gpio_backlight =
devm_gpiod_get(display->drm->dev, "backlight" , flags);
if (IS_ERR(intel_dsi->gpio_backlight)) {
drm_err(display->drm,
"Failed to own gpio for backlight control\n" );
intel_dsi->gpio_backlight = NULL;
}
}
if (gpiod_lookup_table)
gpiod_remove_lookup_table(gpiod_lookup_table);
}
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