// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( C ) 2015 Broadcom
*/
/**
* DOC : VC4 CRTC module
*
* In VC4 , the Pixel Valve is what most closely corresponds to the
* DRM ' s concept of a CRTC . The PV generates video timings from the
* encoder ' s clock plus its configuration . It pulls scaled pixels from
* the HVS at that timing , and feeds it to the encoder .
*
* However , the DRM CRTC also collects the configuration of all the
* DRM planes attached to it . As a result , the CRTC is also
* responsible for writing the display list for the HVS channel that
* the CRTC will use .
*
* The 2835 has 3 different pixel valves . pv0 in the audio power
* domain feeds DSI0 or DPI , while pv1 feeds DS1 or SMI . pv2 in the
* image domain can feed either HDMI or the SDTV controller . The
* pixel valve chooses from the CPRMAN clocks ( HSM for HDMI , VEC for
* SDTV , etc . ) according to which output type is chosen in the mux .
*
* For power management , the pixel valve ' s registers are all clocked
* by the AXI clock , while the timings and FIFOs make use of the
* output - specific clock . Since the encoders also directly consume
* the CPRMAN clocks , and know what timings they need , they are the
* ones that set the clock .
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_fb_dma_helper.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_drv.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "vc4_drv.h"
#include "vc4_hdmi.h"
#include "vc4_regs.h"
#define HVS_FIFO_LATENCY_PIX 6
#define CRTC_WRITE(offset, val) \
do { \
kunit_fail_current_test("Accessing a register in a unit test!\n" ); \
writel(val, vc4_crtc->regs + (offset)); \
} while (0 )
#define CRTC_READ(offset) \
({ \
kunit_fail_current_test("Accessing a register in a unit test!\n" ); \
readl(vc4_crtc->regs + (offset)); \
})
static const struct debugfs_reg32 crtc_regs[] = {
VC4_REG32(PV_CONTROL),
VC4_REG32(PV_V_CONTROL),
VC4_REG32(PV_VSYNCD_EVEN),
VC4_REG32(PV_HORZA),
VC4_REG32(PV_HORZB),
VC4_REG32(PV_VERTA),
VC4_REG32(PV_VERTB),
VC4_REG32(PV_VERTA_EVEN),
VC4_REG32(PV_VERTB_EVEN),
VC4_REG32(PV_INTEN),
VC4_REG32(PV_INTSTAT),
VC4_REG32(PV_STAT),
VC4_REG32(PV_HACT_ACT),
};
static unsigned int
vc4_crtc_get_cob_allocation(struct vc4_dev *vc4, unsigned int channel)
{
struct vc4_hvs *hvs = vc4->hvs;
u32 dispbase, top, base;
/* Top/base are supposed to be 4-pixel aligned, but the
* Raspberry Pi firmware fills the low bits ( which are
* presumably ignored ) .
*/
if (vc4->gen >= VC4_GEN_6_C) {
dispbase = HVS_READ(SCALER6_DISPX_COB(channel));
top = VC4_GET_FIELD(dispbase, SCALER6_DISPX_COB_TOP) & ~3 ;
base = VC4_GET_FIELD(dispbase, SCALER6_DISPX_COB_BASE) & ~3 ;
} else {
dispbase = HVS_READ(SCALER_DISPBASEX(channel));
top = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_TOP) & ~3 ;
base = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_BASE) & ~3 ;
}
return top - base + 4 ;
}
static bool vc4_crtc_get_scanout_position(struct drm_crtc *crtc,
bool in_vblank_irq,
int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_hvs *hvs = vc4->hvs;
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct vc4_crtc_state *vc4_crtc_state = to_vc4_crtc_state(crtc->state);
unsigned int channel = vc4_crtc_state->assigned_channel;
unsigned int cob_size;
u32 val;
int fifo_lines;
int vblank_lines;
bool ret = false ;
/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
/* Get optional system timestamp before query. */
if (stime)
*stime = ktime_get();
/*
* Read vertical scanline which is currently composed for our
* pixelvalve by the HVS , and also the scaler status .
*/
if (vc4->gen >= VC4_GEN_6_C)
val = HVS_READ(SCALER6_DISPX_STATUS(channel));
else
val = HVS_READ(SCALER_DISPSTATX(channel));
/* Get optional system timestamp after query. */
if (etime)
*etime = ktime_get();
/* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
/* Vertical position of hvs composed scanline. */
if (vc4->gen >= VC4_GEN_6_C)
*vpos = VC4_GET_FIELD(val, SCALER6_DISPX_STATUS_YLINE);
else
*vpos = VC4_GET_FIELD(val, SCALER_DISPSTATX_LINE);
*hpos = 0 ;
if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
*vpos /= 2 ;
/* Use hpos to correct for field offset in interlaced mode. */
if (vc4_hvs_get_fifo_frame_count(hvs, channel) % 2 )
*hpos += mode->crtc_htotal / 2 ;
}
cob_size = vc4_crtc_get_cob_allocation(vc4, channel);
/* This is the offset we need for translating hvs -> pv scanout pos. */
fifo_lines = cob_size / mode->crtc_hdisplay;
if (fifo_lines > 0 )
ret = true ;
/* HVS more than fifo_lines into frame for compositing? */
if (*vpos > fifo_lines) {
/*
* We are in active scanout and can get some meaningful results
* from HVS . The actual PV scanout can not trail behind more
* than fifo_lines as that is the fifo ' s capacity . Assume that
* in active scanout the HVS and PV work in lockstep wrt . HVS
* refilling the fifo and PV consuming from the fifo , ie .
* whenever the PV consumes and frees up a scanline in the
* fifo , the HVS will immediately refill it , therefore
* incrementing vpos . Therefore we choose HVS read position -
* fifo size in scanlines as a estimate of the real scanout
* position of the PV .
*/
*vpos -= fifo_lines + 1 ;
return ret;
}
/*
* Less : This happens when we are in vblank and the HVS , after getting
* the VSTART restart signal from the PV , just started refilling its
* fifo with new lines from the top - most lines of the new framebuffers .
* The PV does not scan out in vblank , so does not remove lines from
* the fifo , so the fifo will be full quickly and the HVS has to pause .
* We can ' t get meaningful readings wrt . scanline position of the PV
* and need to make things up in a approximative but consistent way .
*/
vblank_lines = mode->vtotal - mode->vdisplay;
if (in_vblank_irq) {
/*
* Assume the irq handler got called close to first
* line of vblank , so PV has about a full vblank
* scanlines to go , and as a base timestamp use the
* one taken at entry into vblank irq handler , so it
* is not affected by random delays due to lock
* contention on event_lock or vblank_time lock in
* the core .
*/
*vpos = -vblank_lines;
if (stime)
*stime = vc4_crtc->t_vblank;
if (etime)
*etime = vc4_crtc->t_vblank;
/*
* If the HVS fifo is not yet full then we know for certain
* we are at the very beginning of vblank , as the hvs just
* started refilling , and the stime and etime timestamps
* truly correspond to start of vblank .
*
* Unfortunately there ' s no way to report this to upper levels
* and make it more useful .
*/
} else {
/*
* No clue where we are inside vblank . Return a vpos of zero ,
* which will cause calling code to just return the etime
* timestamp uncorrected . At least this is no worse than the
* standard fallback .
*/
*vpos = 0 ;
}
return ret;
}
static u32 vc4_get_fifo_full_level(struct vc4_crtc *vc4_crtc, u32 format)
{
const struct vc4_crtc_data *crtc_data = vc4_crtc_to_vc4_crtc_data(vc4_crtc);
const struct vc4_pv_data *pv_data = vc4_crtc_to_vc4_pv_data(vc4_crtc);
struct vc4_dev *vc4 = to_vc4_dev(vc4_crtc->base.dev);
/*
* NOTE : Could we use register 0 x68 ( PV_HW_CFG1 ) to get the FIFO
* size ?
*/
u32 fifo_len_bytes = pv_data->fifo_depth;
/*
* Pixels are pulled from the HVS if the number of bytes is
* lower than the FIFO full level .
*
* The latency of the pixel fetch mechanism is 6 pixels , so we
* need to convert those 6 pixels in bytes , depending on the
* format , and then subtract that from the length of the FIFO
* to make sure we never end up in a situation where the FIFO
* is full .
*/
switch (format) {
case PV_CONTROL_FORMAT_DSIV_16:
case PV_CONTROL_FORMAT_DSIC_16:
return fifo_len_bytes - 2 * HVS_FIFO_LATENCY_PIX;
case PV_CONTROL_FORMAT_DSIV_18:
return fifo_len_bytes - 14 ;
case PV_CONTROL_FORMAT_24:
case PV_CONTROL_FORMAT_DSIV_24:
default :
/*
* For some reason , the pixelvalve4 doesn ' t work with
* the usual formula and will only work with 32 .
*/
if (crtc_data->hvs_output == 5 )
return 32 ;
/*
* It looks like in some situations , we will overflow
* the PixelValve FIFO ( with the bit 10 of PV stat being
* set ) and stall the HVS / PV , eventually resulting in
* a page flip timeout .
*
* Displaying the video overlay during a playback with
* Kodi on an RPi3 seems to be a great solution with a
* failure rate around 50 % .
*
* Removing 1 from the FIFO full level however
* seems to completely remove that issue .
*/
if (vc4->gen == VC4_GEN_4)
return fifo_len_bytes - 3 * HVS_FIFO_LATENCY_PIX - 1 ;
return fifo_len_bytes - 3 * HVS_FIFO_LATENCY_PIX;
}
}
static u32 vc4_crtc_get_fifo_full_level_bits(struct vc4_crtc *vc4_crtc,
u32 format)
{
u32 level = vc4_get_fifo_full_level(vc4_crtc, format);
u32 ret = 0 ;
ret |= VC4_SET_FIELD((level >> 6 ),
PV5_CONTROL_FIFO_LEVEL_HIGH);
return ret | VC4_SET_FIELD(level & 0 x3f,
PV_CONTROL_FIFO_LEVEL);
}
/*
* Returns the encoder attached to the CRTC .
*
* VC4 can only scan out to one encoder at a time , while the DRM core
* allows drivers to push pixels to more than one encoder from the
* same CRTC .
*/
struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct drm_encoder *encoder;
WARN_ON(hweight32(state->encoder_mask) > 1 );
drm_for_each_encoder_mask(encoder, crtc->dev, state->encoder_mask)
return encoder;
return NULL;
}
static void vc4_crtc_pixelvalve_reset(struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_device *dev = crtc->dev;
int idx;
if (!drm_dev_enter(dev, &idx))
return ;
/* The PV needs to be disabled before it can be flushed */
CRTC_WRITE(PV_CONTROL, CRTC_READ(PV_CONTROL) & ~PV_CONTROL_EN);
CRTC_WRITE(PV_CONTROL, CRTC_READ(PV_CONTROL) | PV_CONTROL_FIFO_CLR);
drm_dev_exit(idx);
}
static void vc4_crtc_config_pv(struct drm_crtc *crtc, struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
const struct vc4_pv_data *pv_data = vc4_crtc_to_vc4_pv_data(vc4_crtc);
struct drm_crtc_state *crtc_state = crtc->state;
struct drm_display_mode *mode = &crtc_state->adjusted_mode;
bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
bool is_hdmi = vc4_encoder->type == VC4_ENCODER_TYPE_HDMI0 ||
vc4_encoder->type == VC4_ENCODER_TYPE_HDMI1;
u32 pixel_rep = ((mode->flags & DRM_MODE_FLAG_DBLCLK) && !is_hdmi) ? 2 : 1 ;
bool is_dsi = (vc4_encoder->type == VC4_ENCODER_TYPE_DSI0 ||
vc4_encoder->type == VC4_ENCODER_TYPE_DSI1);
bool is_dsi1 = vc4_encoder->type == VC4_ENCODER_TYPE_DSI1;
bool is_vec = vc4_encoder->type == VC4_ENCODER_TYPE_VEC;
u32 format = is_dsi1 ? PV_CONTROL_FORMAT_DSIV_24 : PV_CONTROL_FORMAT_24;
u8 ppc = pv_data->pixels_per_clock;
u16 vert_bp = mode->crtc_vtotal - mode->crtc_vsync_end;
u16 vert_sync = mode->crtc_vsync_end - mode->crtc_vsync_start;
u16 vert_fp = mode->crtc_vsync_start - mode->crtc_vdisplay;
bool debug_dump_regs = false ;
int idx;
if (!drm_dev_enter(dev, &idx))
return ;
if (debug_dump_regs) {
struct drm_printer p = drm_info_printer(&vc4_crtc->pdev->dev);
dev_info(&vc4_crtc->pdev->dev, "CRTC %d regs before:\n" ,
drm_crtc_index(crtc));
drm_print_regset32(&p, &vc4_crtc->regset);
}
vc4_crtc_pixelvalve_reset(crtc);
CRTC_WRITE(PV_HORZA,
VC4_SET_FIELD((mode->htotal - mode->hsync_end) * pixel_rep / ppc,
PV_HORZA_HBP) |
VC4_SET_FIELD((mode->hsync_end - mode->hsync_start) * pixel_rep / ppc,
PV_HORZA_HSYNC));
CRTC_WRITE(PV_HORZB,
VC4_SET_FIELD((mode->hsync_start - mode->hdisplay) * pixel_rep / ppc,
PV_HORZB_HFP) |
VC4_SET_FIELD(mode->hdisplay * pixel_rep / ppc,
PV_HORZB_HACTIVE));
if (interlace) {
bool odd_field_first = false ;
u32 field_delay = mode->htotal * pixel_rep / (2 * ppc);
u16 vert_bp_even = vert_bp;
u16 vert_fp_even = vert_fp;
if (is_vec) {
/* VEC (composite output) */
++field_delay;
if (mode->htotal == 858 ) {
/* 525-line mode (NTSC or PAL-M) */
odd_field_first = true ;
}
}
if (odd_field_first)
++vert_fp_even;
else
++vert_bp;
CRTC_WRITE(PV_VERTA_EVEN,
VC4_SET_FIELD(vert_bp_even, PV_VERTA_VBP) |
VC4_SET_FIELD(vert_sync, PV_VERTA_VSYNC));
CRTC_WRITE(PV_VERTB_EVEN,
VC4_SET_FIELD(vert_fp_even, PV_VERTB_VFP) |
VC4_SET_FIELD(mode->crtc_vdisplay, PV_VERTB_VACTIVE));
/* We set up first field even mode for HDMI and VEC's PAL.
* For NTSC , we need first field odd .
*/
CRTC_WRITE(PV_V_CONTROL,
PV_VCONTROL_CONTINUOUS |
(vc4->gen >= VC4_GEN_6_C ? PV_VCONTROL_ODD_TIMING : 0 ) |
(is_dsi ? PV_VCONTROL_DSI : 0 ) |
PV_VCONTROL_INTERLACE |
(odd_field_first
? PV_VCONTROL_ODD_FIRST
: VC4_SET_FIELD(field_delay,
PV_VCONTROL_ODD_DELAY)));
CRTC_WRITE(PV_VSYNCD_EVEN,
(odd_field_first ? field_delay : 0 ));
} else {
CRTC_WRITE(PV_V_CONTROL,
PV_VCONTROL_CONTINUOUS |
(vc4->gen >= VC4_GEN_6_C ? PV_VCONTROL_ODD_TIMING : 0 ) |
(is_dsi ? PV_VCONTROL_DSI : 0 ));
CRTC_WRITE(PV_VSYNCD_EVEN, 0 );
}
CRTC_WRITE(PV_VERTA,
VC4_SET_FIELD(vert_bp, PV_VERTA_VBP) |
VC4_SET_FIELD(vert_sync, PV_VERTA_VSYNC));
CRTC_WRITE(PV_VERTB,
VC4_SET_FIELD(vert_fp, PV_VERTB_VFP) |
VC4_SET_FIELD(mode->crtc_vdisplay, PV_VERTB_VACTIVE));
if (is_dsi)
CRTC_WRITE(PV_HACT_ACT, mode->hdisplay * pixel_rep);
if (vc4->gen >= VC4_GEN_5)
CRTC_WRITE(PV_MUX_CFG,
VC4_SET_FIELD(PV_MUX_CFG_RGB_PIXEL_MUX_MODE_NO_SWAP,
PV_MUX_CFG_RGB_PIXEL_MUX_MODE));
if (vc4->gen >= VC4_GEN_6_C)
CRTC_WRITE(PV_PIPE_INIT_CTRL,
VC4_SET_FIELD(1 , PV_PIPE_INIT_CTRL_PV_INIT_WIDTH) |
VC4_SET_FIELD(1 , PV_PIPE_INIT_CTRL_PV_INIT_IDLE) |
PV_PIPE_INIT_CTRL_PV_INIT_EN);
CRTC_WRITE(PV_CONTROL, PV_CONTROL_FIFO_CLR |
vc4_crtc_get_fifo_full_level_bits(vc4_crtc, format) |
VC4_SET_FIELD(format, PV_CONTROL_FORMAT) |
VC4_SET_FIELD(pixel_rep - 1 , PV_CONTROL_PIXEL_REP) |
PV_CONTROL_CLR_AT_START |
PV_CONTROL_TRIGGER_UNDERFLOW |
PV_CONTROL_WAIT_HSTART |
VC4_SET_FIELD(vc4_encoder->clock_select,
PV_CONTROL_CLK_SELECT));
if (debug_dump_regs) {
struct drm_printer p = drm_info_printer(&vc4_crtc->pdev->dev);
dev_info(&vc4_crtc->pdev->dev, "CRTC %d regs after:\n" ,
drm_crtc_index(crtc));
drm_print_regset32(&p, &vc4_crtc->regset);
}
drm_dev_exit(idx);
}
static void require_hvs_enabled(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_hvs *hvs = vc4->hvs;
if (vc4->gen >= VC4_GEN_6_C)
WARN_ON_ONCE(!(HVS_READ(SCALER6_CONTROL) & SCALER6_CONTROL_HVS_EN));
else
WARN_ON_ONCE(!(HVS_READ(SCALER_DISPCTRL) & SCALER_DISPCTRL_ENABLE));
}
static int vc4_crtc_disable(struct drm_crtc *crtc,
struct drm_encoder *encoder,
struct drm_atomic_state *state,
unsigned int channel)
{
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
int idx, ret;
if (!drm_dev_enter(dev, &idx))
return -ENODEV;
CRTC_WRITE(PV_V_CONTROL,
CRTC_READ(PV_V_CONTROL) & ~PV_VCONTROL_VIDEN);
ret = wait_for(!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN), 1 );
WARN_ONCE(ret, "Timeout waiting for !PV_VCONTROL_VIDEN\n" );
/*
* This delay is needed to avoid to get a pixel stuck in an
* unflushable FIFO between the pixelvalve and the HDMI
* controllers on the BCM2711 .
*
* Timing is fairly sensitive here , so mdelay is the safest
* approach .
*
* If it was to be reworked , the stuck pixel happens on a
* BCM2711 when changing mode with a good probability , so a
* script that changes mode on a regular basis should trigger
* the bug after less than 10 attempts . It manifests itself with
* every pixels being shifted by one to the right , and thus the
* last pixel of a line actually being displayed as the first
* pixel on the next line .
*/
mdelay(20 );
if (vc4_encoder && vc4_encoder->post_crtc_disable)
vc4_encoder->post_crtc_disable(encoder, state);
vc4_crtc_pixelvalve_reset(crtc);
vc4_hvs_stop_channel(vc4->hvs, channel);
if (vc4_encoder && vc4_encoder->post_crtc_powerdown)
vc4_encoder->post_crtc_powerdown(encoder, state);
drm_dev_exit(idx);
return 0 ;
}
int vc4_crtc_disable_at_boot(struct drm_crtc *crtc)
{
struct drm_device *drm = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
enum vc4_encoder_type encoder_type;
const struct vc4_pv_data *pv_data;
struct drm_encoder *encoder;
struct vc4_hdmi *vc4_hdmi;
unsigned encoder_sel;
int channel;
int ret;
if (!(of_device_is_compatible(vc4_crtc->pdev->dev.of_node,
"brcm,bcm2711-pixelvalve2" ) ||
of_device_is_compatible(vc4_crtc->pdev->dev.of_node,
"brcm,bcm2711-pixelvalve4" ) ||
of_device_is_compatible(vc4_crtc->pdev->dev.of_node,
"brcm,bcm2712-pixelvalve0" ) ||
of_device_is_compatible(vc4_crtc->pdev->dev.of_node,
"brcm,bcm2712-pixelvalve1" )))
return 0 ;
if (!(CRTC_READ(PV_CONTROL) & PV_CONTROL_EN))
return 0 ;
if (!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN))
return 0 ;
channel = vc4_hvs_get_fifo_from_output(vc4->hvs, vc4_crtc->data->hvs_output);
if (channel < 0 )
return 0 ;
encoder_sel = VC4_GET_FIELD(CRTC_READ(PV_CONTROL), PV_CONTROL_CLK_SELECT);
if (WARN_ON(encoder_sel != 0 ))
return 0 ;
pv_data = vc4_crtc_to_vc4_pv_data(vc4_crtc);
encoder_type = pv_data->encoder_types[encoder_sel];
encoder = vc4_find_encoder_by_type(drm, encoder_type);
if (WARN_ON(!encoder))
return 0 ;
vc4_hdmi = encoder_to_vc4_hdmi(encoder);
ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
if (ret)
return ret;
ret = vc4_crtc_disable(crtc, encoder, NULL, channel);
if (ret)
return ret;
/*
* post_crtc_powerdown will have called pm_runtime_put , so we
* don ' t need it here otherwise we ' ll get the reference counting
* wrong .
*/
return 0 ;
}
void vc4_crtc_send_vblank(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
unsigned long flags;
if (!crtc->state || !crtc->state->event)
return ;
spin_lock_irqsave(&dev->event_lock, flags);
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
spin_unlock_irqrestore(&dev->event_lock, flags);
}
static void vc4_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
crtc);
struct vc4_crtc_state *old_vc4_state = to_vc4_crtc_state(old_state);
struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, old_state);
struct drm_device *dev = crtc->dev;
drm_dbg(dev, "Disabling CRTC %s (%u) connected to Encoder %s (%u)" ,
crtc->name, crtc->base.id, encoder->name, encoder->base.id);
require_hvs_enabled(dev);
/* Disable vblank irq handling before crtc is disabled. */
drm_crtc_vblank_off(crtc);
vc4_crtc_disable(crtc, encoder, state, old_vc4_state->assigned_channel);
/*
* Make sure we issue a vblank event after disabling the CRTC if
* someone was waiting it .
*/
vc4_crtc_send_vblank(crtc);
}
static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state,
crtc);
struct drm_device *dev = crtc->dev;
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, new_state);
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
int idx;
drm_dbg(dev, "Enabling CRTC %s (%u) connected to Encoder %s (%u)" ,
crtc->name, crtc->base.id, encoder->name, encoder->base.id);
if (!drm_dev_enter(dev, &idx))
return ;
require_hvs_enabled(dev);
/* Enable vblank irq handling before crtc is started otherwise
* drm_crtc_get_vblank ( ) fails in vc4_crtc_update_dlist ( ) .
*/
drm_crtc_vblank_on(crtc);
vc4_hvs_atomic_enable(crtc, state);
if (vc4_encoder->pre_crtc_configure)
vc4_encoder->pre_crtc_configure(encoder, state);
vc4_crtc_config_pv(crtc, encoder, state);
CRTC_WRITE(PV_CONTROL, CRTC_READ(PV_CONTROL) | PV_CONTROL_EN);
if (vc4_encoder->pre_crtc_enable)
vc4_encoder->pre_crtc_enable(encoder, state);
/* When feeding the transposer block the pixelvalve is unneeded and
* should not be enabled .
*/
CRTC_WRITE(PV_V_CONTROL,
CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN);
if (vc4_encoder->post_crtc_enable)
vc4_encoder->post_crtc_enable(encoder, state);
drm_dev_exit(idx);
}
static enum drm_mode_status vc4_crtc_mode_valid(struct drm_crtc *crtc,
const struct drm_display_mode *mode)
{
/* Do not allow doublescan modes from user space */
if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
DRM_DEBUG_KMS("[CRTC:%d] Doublescan mode rejected.\n" ,
crtc->base.id);
return MODE_NO_DBLESCAN;
}
return MODE_OK;
}
void vc4_crtc_get_margins(struct drm_crtc_state *state,
unsigned int *left, unsigned int *right,
unsigned int *top, unsigned int *bottom)
{
struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(state);
struct drm_connector_state *conn_state;
struct drm_connector *conn;
int i;
*left = vc4_state->margins.left;
*right = vc4_state->margins.right;
*top = vc4_state->margins.top;
*bottom = vc4_state->margins.bottom;
/* We have to interate over all new connector states because
* vc4_crtc_get_margins ( ) might be called before
* vc4_crtc_atomic_check ( ) which means margins info in vc4_crtc_state
* might be outdated .
*/
for_each_new_connector_in_state(state->state, conn, conn_state, i) {
if (conn_state->crtc != state->crtc)
continue ;
*left = conn_state->tv.margins.left;
*right = conn_state->tv.margins.right;
*top = conn_state->tv.margins.top;
*bottom = conn_state->tv.margins.bottom;
break ;
}
}
int vc4_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(crtc_state);
struct drm_connector *conn;
struct drm_connector_state *conn_state;
struct drm_encoder *encoder;
int ret, i;
ret = vc4_hvs_atomic_check(crtc, state);
if (ret)
return ret;
encoder = vc4_get_crtc_encoder(crtc, crtc_state);
if (encoder) {
const struct drm_display_mode *mode = &crtc_state->adjusted_mode;
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
if (vc4_encoder->type == VC4_ENCODER_TYPE_HDMI0) {
vc4_state->hvs_load = max(mode->clock * mode->hdisplay / mode->htotal + 8000 ,
mode->clock * 9 / 10 ) * 1000 ;
} else {
vc4_state->hvs_load = mode->clock * 1000 ;
}
}
for_each_new_connector_in_state(state, conn, conn_state,
i) {
if (conn_state->crtc != crtc)
continue ;
if (memcmp(&vc4_state->margins, &conn_state->tv.margins,
sizeof (vc4_state->margins))) {
memcpy(&vc4_state->margins, &conn_state->tv.margins,
sizeof (vc4_state->margins));
/*
* Need to force the dlist entries for all planes to be
* updated so that the dest rectangles are changed .
*/
crtc_state->zpos_changed = true ;
}
break ;
}
return 0 ;
}
static int vc4_enable_vblank(struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_device *dev = crtc->dev;
int idx;
if (!drm_dev_enter(dev, &idx))
return -ENODEV;
CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
drm_dev_exit(idx);
return 0 ;
}
static void vc4_disable_vblank(struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_device *dev = crtc->dev;
int idx;
if (!drm_dev_enter(dev, &idx))
return ;
CRTC_WRITE(PV_INTEN, 0 );
drm_dev_exit(idx);
}
static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
{
struct drm_crtc *crtc = &vc4_crtc->base;
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_hvs *hvs = vc4->hvs;
unsigned int current_dlist;
u32 chan = vc4_crtc->current_hvs_channel;
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
spin_lock(&vc4_crtc->irq_lock);
if (vc4->gen >= VC4_GEN_6_C)
current_dlist = VC4_GET_FIELD(HVS_READ(SCALER6_DISPX_DL(chan)),
SCALER6_DISPX_DL_LACT);
else
current_dlist = HVS_READ(SCALER_DISPLACTX(chan));
if (vc4_crtc->event &&
(vc4_crtc->current_dlist == current_dlist || vc4_crtc->feeds_txp)) {
drm_crtc_send_vblank_event(crtc, vc4_crtc->event);
vc4_crtc->event = NULL;
drm_crtc_vblank_put(crtc);
/* Wait for the page flip to unmask the underrun to ensure that
* the display list was updated by the hardware . Before that
* happens , the HVS will be using the previous display list with
* the CRTC and encoder already reconfigured , leading to
* underruns . This can be seen when reconfiguring the CRTC .
*/
if (vc4->gen < VC4_GEN_6_C)
vc4_hvs_unmask_underrun(hvs, chan);
}
spin_unlock(&vc4_crtc->irq_lock);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
void vc4_crtc_handle_vblank(struct vc4_crtc *crtc)
{
crtc->t_vblank = ktime_get();
drm_crtc_handle_vblank(&crtc->base);
vc4_crtc_handle_page_flip(crtc);
}
static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
{
struct vc4_crtc *vc4_crtc = data;
u32 stat = CRTC_READ(PV_INTSTAT);
irqreturn_t ret = IRQ_NONE;
if (stat & PV_INT_VFP_START) {
CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
vc4_crtc_handle_vblank(vc4_crtc);
ret = IRQ_HANDLED;
}
return ret;
}
struct vc4_async_flip_state {
struct drm_crtc *crtc;
struct drm_framebuffer *fb;
struct drm_framebuffer *old_fb;
struct drm_pending_vblank_event *event;
struct dma_fence_cb cb;
};
/* Called when the V3D execution for the BO being flipped to is done, so that
* we can actually update the plane ' s address to point to it .
*/
static void
vc4_async_page_flip_complete(struct vc4_async_flip_state *flip_state)
{
struct drm_crtc *crtc = flip_state->crtc;
struct drm_device *dev = crtc->dev;
struct drm_plane *plane = crtc->primary;
vc4_plane_async_set_fb(plane, flip_state->fb);
if (flip_state->event) {
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
drm_crtc_send_vblank_event(crtc, flip_state->event);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
drm_crtc_vblank_put(crtc);
drm_framebuffer_put(flip_state->fb);
if (flip_state->old_fb)
drm_framebuffer_put(flip_state->old_fb);
kfree(flip_state);
}
static void vc4_async_page_flip_complete_with_cleanup(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
struct vc4_async_flip_state *flip_state =
container_of(cb, struct vc4_async_flip_state, cb);
struct vc4_bo *bo = NULL;
if (flip_state->old_fb) {
struct drm_gem_dma_object *dma_bo =
drm_fb_dma_get_gem_obj(flip_state->old_fb, 0 );
bo = to_vc4_bo(&dma_bo->base);
}
vc4_async_page_flip_complete(flip_state);
dma_fence_put(fence);
/*
* Decrement the BO usecnt in order to keep the inc / dec
* calls balanced when the planes are updated through
* the async update path .
*
* FIXME : we should move to generic async - page - flip when
* it ' s available , so that we can get rid of this
* hand - made cleanup_fb ( ) logic .
*/
if (bo)
vc4_bo_dec_usecnt(bo);
}
static void vc4_async_page_flip_fence_complete(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
struct vc4_async_flip_state *flip_state =
container_of(cb, struct vc4_async_flip_state, cb);
vc4_async_page_flip_complete(flip_state);
dma_fence_put(fence);
}
static int vc4_async_set_fence_cb(struct drm_device *dev,
struct vc4_async_flip_state *flip_state)
{
struct drm_framebuffer *fb = flip_state->fb;
struct drm_gem_dma_object *dma_bo = drm_fb_dma_get_gem_obj(fb, 0 );
dma_fence_func_t async_page_flip_complete_function;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct dma_fence *fence;
int ret;
if (vc4->gen == VC4_GEN_4)
async_page_flip_complete_function = vc4_async_page_flip_complete_with_cleanup;
else
async_page_flip_complete_function = vc4_async_page_flip_fence_complete;
ret = dma_resv_get_singleton(dma_bo->base.resv, DMA_RESV_USAGE_READ, &fence);
if (ret)
return ret;
/* If there's no fence, complete the page flip immediately */
if (!fence) {
async_page_flip_complete_function(fence, &flip_state->cb);
return 0 ;
}
/* If the fence has already been completed, complete the page flip */
if (dma_fence_add_callback(fence, &flip_state->cb,
async_page_flip_complete_function))
async_page_flip_complete_function(fence, &flip_state->cb);
return 0 ;
}
static int
vc4_async_page_flip_common(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags)
{
struct drm_device *dev = crtc->dev;
struct drm_plane *plane = crtc->primary;
struct vc4_async_flip_state *flip_state;
flip_state = kzalloc(sizeof (*flip_state), GFP_KERNEL);
if (!flip_state)
return -ENOMEM;
drm_framebuffer_get(fb);
flip_state->fb = fb;
flip_state->crtc = crtc;
flip_state->event = event;
/* Save the current FB before it's replaced by the new one in
* drm_atomic_set_fb_for_plane ( ) . We ' ll need the old FB in
* vc4_async_page_flip_complete ( ) to decrement the BO usecnt and keep
* it consistent .
* FIXME : we should move to generic async - page - flip when it ' s
* available , so that we can get rid of this hand - made cleanup_fb ( )
* logic .
*/
flip_state->old_fb = plane->state->fb;
if (flip_state->old_fb)
drm_framebuffer_get(flip_state->old_fb);
WARN_ON(drm_crtc_vblank_get(crtc) != 0 );
/* Immediately update the plane's legacy fb pointer, so that later
* modeset prep sees the state that will be present when the semaphore
* is released .
*/
drm_atomic_set_fb_for_plane(plane->state, fb);
vc4_async_set_fence_cb(dev, flip_state);
/* Driver takes ownership of state on successful async commit. */
return 0 ;
}
/* Implements async (non-vblank-synced) page flips.
*
* The page flip ioctl needs to return immediately , so we grab the
* modeset semaphore on the pipe , and queue the address update for
* when V3D is done with the BO being flipped to .
*/
static int vc4_async_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_gem_dma_object *dma_bo = drm_fb_dma_get_gem_obj(fb, 0 );
struct vc4_bo *bo = to_vc4_bo(&dma_bo->base);
int ret;
if (WARN_ON_ONCE(vc4->gen > VC4_GEN_4))
return -ENODEV;
/*
* Increment the BO usecnt here , so that we never end up with an
* unbalanced number of vc4_bo_ { dec , inc } _ usecnt ( ) calls when the
* plane is later updated through the non - async path .
*
* FIXME : we should move to generic async - page - flip when
* it ' s available , so that we can get rid of this
* hand - made prepare_fb ( ) logic .
*/
ret = vc4_bo_inc_usecnt(bo);
if (ret)
return ret;
ret = vc4_async_page_flip_common(crtc, fb, event, flags);
if (ret) {
vc4_bo_dec_usecnt(bo);
return ret;
}
return 0 ;
}
static int vc5_async_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags)
{
return vc4_async_page_flip_common(crtc, fb, event, flags);
}
int vc4_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
struct drm_pending_vblank_event *event,
uint32_t flags,
struct drm_modeset_acquire_ctx *ctx)
{
if (flags & DRM_MODE_PAGE_FLIP_ASYNC) {
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
if (vc4->gen > VC4_GEN_4)
return vc5_async_page_flip(crtc, fb, event, flags);
else
return vc4_async_page_flip(crtc, fb, event, flags);
} else {
return drm_atomic_helper_page_flip(crtc, fb, event, flags, ctx);
}
}
struct drm_crtc_state *vc4_crtc_duplicate_state(struct drm_crtc *crtc)
{
struct vc4_crtc_state *vc4_state, *old_vc4_state;
vc4_state = kzalloc(sizeof (*vc4_state), GFP_KERNEL);
if (!vc4_state)
return NULL;
old_vc4_state = to_vc4_crtc_state(crtc->state);
vc4_state->margins = old_vc4_state->margins;
vc4_state->assigned_channel = old_vc4_state->assigned_channel;
__drm_atomic_helper_crtc_duplicate_state(crtc, &vc4_state->base);
return &vc4_state->base;
}
void vc4_crtc_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct vc4_dev *vc4 = to_vc4_dev(crtc->dev);
struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(state);
if (drm_mm_node_allocated(&vc4_state->mm)) {
unsigned long flags;
spin_lock_irqsave(&vc4->hvs->mm_lock, flags);
drm_mm_remove_node(&vc4_state->mm);
spin_unlock_irqrestore(&vc4->hvs->mm_lock, flags);
}
drm_atomic_helper_crtc_destroy_state(crtc, state);
}
void vc4_crtc_reset(struct drm_crtc *crtc)
{
struct vc4_crtc_state *vc4_crtc_state;
if (crtc->state)
vc4_crtc_destroy_state(crtc, crtc->state);
vc4_crtc_state = kzalloc(sizeof (*vc4_crtc_state), GFP_KERNEL);
if (!vc4_crtc_state) {
crtc->state = NULL;
return ;
}
vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED;
__drm_atomic_helper_crtc_reset(crtc, &vc4_crtc_state->base);
}
int vc4_crtc_late_register(struct drm_crtc *crtc)
{
struct drm_device *drm = crtc->dev;
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
const struct vc4_crtc_data *crtc_data = vc4_crtc_to_vc4_crtc_data(vc4_crtc);
vc4_debugfs_add_regset32(drm, crtc_data->debugfs_name,
&vc4_crtc->regset);
return 0 ;
}
static const struct drm_crtc_funcs vc4_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.page_flip = vc4_page_flip,
.set_property = NULL,
.cursor_set = NULL, /* handled by drm_mode_cursor_universal */
.cursor_move = NULL, /* handled by drm_mode_cursor_universal */
.reset = vc4_crtc_reset,
.atomic_duplicate_state = vc4_crtc_duplicate_state,
.atomic_destroy_state = vc4_crtc_destroy_state,
.enable_vblank = vc4_enable_vblank,
.disable_vblank = vc4_disable_vblank,
.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
.late_register = vc4_crtc_late_register,
};
static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
.mode_valid = vc4_crtc_mode_valid,
.atomic_check = vc4_crtc_atomic_check,
.atomic_begin = vc4_hvs_atomic_begin,
.atomic_flush = vc4_hvs_atomic_flush,
.atomic_enable = vc4_crtc_atomic_enable,
.atomic_disable = vc4_crtc_atomic_disable,
.get_scanout_position = vc4_crtc_get_scanout_position,
};
const struct vc4_pv_data bcm2835_pv0_data = {
.base = {
.name = "pixelvalve-0" ,
.debugfs_name = "crtc0_regs" ,
.hvs_available_channels = BIT(0 ),
.hvs_output = 0 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI0,
[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_DPI,
},
};
const struct vc4_pv_data bcm2835_pv1_data = {
.base = {
.name = "pixelvalve-1" ,
.debugfs_name = "crtc1_regs" ,
.hvs_available_channels = BIT(2 ),
.hvs_output = 2 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[PV_CONTROL_CLK_SELECT_DSI] = VC4_ENCODER_TYPE_DSI1,
[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_SMI,
},
};
const struct vc4_pv_data bcm2835_pv2_data = {
.base = {
.name = "pixelvalve-2" ,
.debugfs_name = "crtc2_regs" ,
.hvs_available_channels = BIT(1 ),
.hvs_output = 1 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[PV_CONTROL_CLK_SELECT_DPI_SMI_HDMI] = VC4_ENCODER_TYPE_HDMI0,
[PV_CONTROL_CLK_SELECT_VEC] = VC4_ENCODER_TYPE_VEC,
},
};
const struct vc4_pv_data bcm2711_pv0_data = {
.base = {
.name = "pixelvalve-0" ,
.debugfs_name = "crtc0_regs" ,
.hvs_available_channels = BIT(0 ),
.hvs_output = 0 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_DSI0,
[1 ] = VC4_ENCODER_TYPE_DPI,
},
};
const struct vc4_pv_data bcm2711_pv1_data = {
.base = {
.name = "pixelvalve-1" ,
.debugfs_name = "crtc1_regs" ,
.hvs_available_channels = BIT(0 ) | BIT(1 ) | BIT(2 ),
.hvs_output = 3 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_DSI1,
[1 ] = VC4_ENCODER_TYPE_SMI,
},
};
const struct vc4_pv_data bcm2711_pv2_data = {
.base = {
.name = "pixelvalve-2" ,
.debugfs_name = "crtc2_regs" ,
.hvs_available_channels = BIT(0 ) | BIT(1 ) | BIT(2 ),
.hvs_output = 4 ,
},
.fifo_depth = 256 ,
.pixels_per_clock = 2 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_HDMI0,
},
};
const struct vc4_pv_data bcm2711_pv3_data = {
.base = {
.name = "pixelvalve-3" ,
.debugfs_name = "crtc3_regs" ,
.hvs_available_channels = BIT(1 ),
.hvs_output = 1 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[PV_CONTROL_CLK_SELECT_VEC] = VC4_ENCODER_TYPE_VEC,
},
};
const struct vc4_pv_data bcm2711_pv4_data = {
.base = {
.name = "pixelvalve-4" ,
.debugfs_name = "crtc4_regs" ,
.hvs_available_channels = BIT(0 ) | BIT(1 ) | BIT(2 ),
.hvs_output = 5 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 2 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_HDMI1,
},
};
const struct vc4_pv_data bcm2712_pv0_data = {
.base = {
.debugfs_name = "crtc0_regs" ,
.hvs_available_channels = BIT(0 ),
.hvs_output = 0 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_HDMI0,
},
};
const struct vc4_pv_data bcm2712_pv1_data = {
.base = {
.debugfs_name = "crtc1_regs" ,
.hvs_available_channels = BIT(1 ),
.hvs_output = 1 ,
},
.fifo_depth = 64 ,
.pixels_per_clock = 1 ,
.encoder_types = {
[0 ] = VC4_ENCODER_TYPE_HDMI1,
},
};
static const struct of_device_id vc4_crtc_dt_match[] = {
{ .compatible = "brcm,bcm2835-pixelvalve0" , .data = &bcm2835_pv0_data },
{ .compatible = "brcm,bcm2835-pixelvalve1" , .data = &bcm2835_pv1_data },
{ .compatible = "brcm,bcm2835-pixelvalve2" , .data = &bcm2835_pv2_data },
{ .compatible = "brcm,bcm2711-pixelvalve0" , .data = &bcm2711_pv0_data },
{ .compatible = "brcm,bcm2711-pixelvalve1" , .data = &bcm2711_pv1_data },
{ .compatible = "brcm,bcm2711-pixelvalve2" , .data = &bcm2711_pv2_data },
{ .compatible = "brcm,bcm2711-pixelvalve3" , .data = &bcm2711_pv3_data },
{ .compatible = "brcm,bcm2711-pixelvalve4" , .data = &bcm2711_pv4_data },
{ .compatible = "brcm,bcm2712-pixelvalve0" , .data = &bcm2712_pv0_data },
{ .compatible = "brcm,bcm2712-pixelvalve1" , .data = &bcm2712_pv1_data },
{}
};
static void vc4_set_crtc_possible_masks(struct drm_device *drm,
struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
const struct vc4_pv_data *pv_data = vc4_crtc_to_vc4_pv_data(vc4_crtc);
const enum vc4_encoder_type *encoder_types = pv_data->encoder_types;
struct drm_encoder *encoder;
drm_for_each_encoder(encoder, drm) {
struct vc4_encoder *vc4_encoder;
int i;
if (encoder->encoder_type == DRM_MODE_ENCODER_VIRTUAL)
continue ;
vc4_encoder = to_vc4_encoder(encoder);
for (i = 0 ; i < ARRAY_SIZE(pv_data->encoder_types); i++) {
if (vc4_encoder->type == encoder_types[i]) {
vc4_encoder->clock_select = i;
encoder->possible_crtcs |= drm_crtc_mask(crtc);
break ;
}
}
}
}
/**
* _ _ vc4_crtc_init - Initializes a CRTC
* @ drm : DRM Device
* @ pdev : CRTC Platform Device
* @ vc4_crtc : CRTC Object to Initialize
* @ data : Configuration data associated with this CRTC
* @ primary_plane : Primary plane for CRTC
* @ crtc_funcs : Callbacks for the new CRTC
* @ crtc_helper_funcs : Helper Callbacks for the new CRTC
* @ feeds_txp : Is this CRTC connected to the TXP ?
*
* Initializes our private CRTC structure . This function is mostly
* relevant for KUnit testing , all other users should use
* vc4_crtc_init ( ) instead .
*
* Returns :
* 0 on success , a negative error code on failure .
*/
int __vc4_crtc_init(struct drm_device *drm,
struct platform_device *pdev,
struct vc4_crtc *vc4_crtc,
const struct vc4_crtc_data *data,
struct drm_plane *primary_plane,
const struct drm_crtc_funcs *crtc_funcs,
const struct drm_crtc_helper_funcs *crtc_helper_funcs,
bool feeds_txp)
{
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct drm_crtc *crtc = &vc4_crtc->base;
unsigned int i;
int ret;
vc4_crtc->data = data;
vc4_crtc->pdev = pdev;
vc4_crtc->feeds_txp = feeds_txp;
spin_lock_init(&vc4_crtc->irq_lock);
ret = drmm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
crtc_funcs, data->name);
if (ret)
return ret;
drm_crtc_helper_add(crtc, crtc_helper_funcs);
if (vc4->gen == VC4_GEN_4) {
drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r));
drm_crtc_enable_color_mgmt(crtc, 0 , false , crtc->gamma_size);
/* We support CTM, but only for one CRTC at a time. It's therefore
* implemented as private driver state in vc4_kms , not here .
*/
drm_crtc_enable_color_mgmt(crtc, 0 , true , crtc->gamma_size);
}
for (i = 0 ; i < crtc->gamma_size; i++) {
vc4_crtc->lut_r[i] = i;
vc4_crtc->lut_g[i] = i;
vc4_crtc->lut_b[i] = i;
}
return 0 ;
}
int vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
struct vc4_crtc *vc4_crtc,
const struct vc4_crtc_data *data,
const struct drm_crtc_funcs *crtc_funcs,
const struct drm_crtc_helper_funcs *crtc_helper_funcs,
bool feeds_txp)
{
struct drm_plane *primary_plane;
/* For now, we create just the primary and the legacy cursor
* planes . We should be able to stack more planes on easily ,
* but to do that we would need to compute the bandwidth
* requirement of the plane configuration , and reject ones
* that will take too much .
*/
primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY, 0 );
if (IS_ERR(primary_plane)) {
dev_err(drm->dev, "failed to construct primary plane\n" );
return PTR_ERR(primary_plane);
}
return __vc4_crtc_init(drm, pdev, vc4_crtc, data, primary_plane,
crtc_funcs, crtc_helper_funcs, feeds_txp);
}
static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
const struct vc4_pv_data *pv_data;
struct vc4_crtc *vc4_crtc;
struct drm_crtc *crtc;
int ret;
vc4_crtc = drmm_kzalloc(drm, sizeof (*vc4_crtc), GFP_KERNEL);
if (!vc4_crtc)
return -ENOMEM;
crtc = &vc4_crtc->base;
pv_data = of_device_get_match_data(dev);
if (!pv_data)
return -ENODEV;
vc4_crtc->regs = vc4_ioremap_regs(pdev, 0 );
if (IS_ERR(vc4_crtc->regs))
return PTR_ERR(vc4_crtc->regs);
vc4_crtc->regset.base = vc4_crtc->regs;
vc4_crtc->regset.regs = crtc_regs;
vc4_crtc->regset.nregs = ARRAY_SIZE(crtc_regs);
ret = vc4_crtc_init(drm, pdev, vc4_crtc, &pv_data->base,
&vc4_crtc_funcs, &vc4_crtc_helper_funcs,
false );
if (ret)
return ret;
vc4_set_crtc_possible_masks(drm, crtc);
CRTC_WRITE(PV_INTEN, 0 );
CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
ret = devm_request_irq(dev, platform_get_irq(pdev, 0 ),
vc4_crtc_irq_handler,
IRQF_SHARED,
"vc4 crtc" , vc4_crtc);
if (ret)
return ret;
platform_set_drvdata(pdev, vc4_crtc);
return 0 ;
}
static void vc4_crtc_unbind(struct device *dev, struct device *master,
void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev);
CRTC_WRITE(PV_INTEN, 0 );
platform_set_drvdata(pdev, NULL);
}
static const struct component_ops vc4_crtc_ops = {
.bind = vc4_crtc_bind,
.unbind = vc4_crtc_unbind,
};
static int vc4_crtc_dev_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vc4_crtc_ops);
}
static void vc4_crtc_dev_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vc4_crtc_ops);
}
struct platform_driver vc4_crtc_driver = {
.probe = vc4_crtc_dev_probe,
.remove = vc4_crtc_dev_remove,
.driver = {
.name = "vc4_crtc" ,
.of_match_table = vc4_crtc_dt_match,
},
};
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