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media: drm: rcar-du: Add support for CRC computation

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Implement CRC computation configuration and reporting through the DRM
debugfs-based CRC API. The CRC source can be configured to any input
plane or the pipeline output.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Laurent Pinchart 2017-12-01 06:59:55 -05:00 committed by Mauro Carvalho Chehab
parent 5e824f989e
commit 47a52d024e
3 changed files with 171 additions and 6 deletions
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156
drivers/gpu/drm/rcar-du/rcar_du_crtc.c
View File

@ -691,6 +691,52 @@ static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
.atomic_disable = rcar_du_crtc_atomic_disable,
};
static struct drm_crtc_state *
rcar_du_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
{
struct rcar_du_crtc_state *state;
struct rcar_du_crtc_state *copy;
if (WARN_ON(!crtc->state))
return NULL;
state = to_rcar_crtc_state(crtc->state);
copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
if (copy == NULL)
return NULL;
__drm_atomic_helper_crtc_duplicate_state(crtc, &copy->state);
return &copy->state;
}
static void rcar_du_crtc_atomic_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
__drm_atomic_helper_crtc_destroy_state(state);
kfree(to_rcar_crtc_state(state));
}
static void rcar_du_crtc_reset(struct drm_crtc *crtc)
{
struct rcar_du_crtc_state *state;
if (crtc->state) {
rcar_du_crtc_atomic_destroy_state(crtc, crtc->state);
crtc->state = NULL;
}
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state == NULL)
return;
state->crc.source = VSP1_DU_CRC_NONE;
state->crc.index = 0;
crtc->state = &state->state;
crtc->state->crtc = crtc;
}
static int rcar_du_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
@ -710,17 +756,113 @@ static void rcar_du_crtc_disable_vblank(struct drm_crtc *crtc)
rcrtc->vblank_enable = false;
}
static const struct drm_crtc_funcs crtc_funcs = {
.reset = drm_atomic_helper_crtc_reset,
static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc,
const char *source_name,
size_t *values_cnt)
{
struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
struct drm_modeset_acquire_ctx ctx;
struct drm_crtc_state *crtc_state;
struct drm_atomic_state *state;
enum vsp1_du_crc_source source;
unsigned int index = 0;
unsigned int i;
int ret;
/*
* Parse the source name. Supported values are "plane%u" to compute the
* CRC on an input plane (%u is the plane ID), and "auto" to compute the
* CRC on the composer (VSP) output.
*/
if (!source_name) {
source = VSP1_DU_CRC_NONE;
} else if (!strcmp(source_name, "auto")) {
source = VSP1_DU_CRC_OUTPUT;
} else if (strstarts(source_name, "plane")) {
source = VSP1_DU_CRC_PLANE;
ret = kstrtouint(source_name + strlen("plane"), 10, &index);
if (ret < 0)
return ret;
for (i = 0; i < rcrtc->vsp->num_planes; ++i) {
if (index == rcrtc->vsp->planes[i].plane.base.id) {
index = i;
break;
}
}
if (i >= rcrtc->vsp->num_planes)
return -EINVAL;
} else {
return -EINVAL;
}
*values_cnt = 1;
/* Perform an atomic commit to set the CRC source. */
drm_modeset_acquire_init(&ctx, 0);
state = drm_atomic_state_alloc(crtc->dev);
if (!state) {
ret = -ENOMEM;
goto unlock;
}
state->acquire_ctx = &ctx;
retry:
crtc_state = drm_atomic_get_crtc_state(state, crtc);
if (!IS_ERR(crtc_state)) {
struct rcar_du_crtc_state *rcrtc_state;
rcrtc_state = to_rcar_crtc_state(crtc_state);
rcrtc_state->crc.source = source;
rcrtc_state->crc.index = index;
ret = drm_atomic_commit(state);
} else {
ret = PTR_ERR(crtc_state);
}
if (ret == -EDEADLK) {
drm_atomic_state_clear(state);
drm_modeset_backoff(&ctx);
goto retry;
}
drm_atomic_state_put(state);
unlock:
drm_modeset_drop_locks(&ctx);
drm_modeset_acquire_fini(&ctx);
return 0;
}
static const struct drm_crtc_funcs crtc_funcs_gen2 = {
.reset = rcar_du_crtc_reset,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_duplicate_state = rcar_du_crtc_atomic_duplicate_state,
.atomic_destroy_state = rcar_du_crtc_atomic_destroy_state,
.enable_vblank = rcar_du_crtc_enable_vblank,
.disable_vblank = rcar_du_crtc_disable_vblank,
};
static const struct drm_crtc_funcs crtc_funcs_gen3 = {
.reset = rcar_du_crtc_reset,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = rcar_du_crtc_atomic_duplicate_state,
.atomic_destroy_state = rcar_du_crtc_atomic_destroy_state,
.enable_vblank = rcar_du_crtc_enable_vblank,
.disable_vblank = rcar_du_crtc_disable_vblank,
.set_crc_source = rcar_du_crtc_set_crc_source,
};
/* -----------------------------------------------------------------------------
* Interrupt Handling
*/
@ -821,8 +963,10 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
else
primary = &rgrp->planes[index % 2].plane;
ret = drm_crtc_init_with_planes(rcdu->ddev, crtc, primary,
NULL, &crtc_funcs, NULL);
ret = drm_crtc_init_with_planes(rcdu->ddev, crtc, primary, NULL,
rcdu->info->gen <= 2 ?
&crtc_funcs_gen2 : &crtc_funcs_gen3,
NULL);
if (ret < 0)
return ret;

15
drivers/gpu/drm/rcar-du/rcar_du_crtc.h
View File

@ -21,6 +21,8 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <media/vsp1.h>
struct rcar_du_group;
struct rcar_du_vsp;
@ -69,6 +71,19 @@ struct rcar_du_crtc {
#define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
/**
* struct rcar_du_crtc_state - Driver-specific CRTC state
* @state: base DRM CRTC state
* @crc: CRC computation configuration
*/
struct rcar_du_crtc_state {
struct drm_crtc_state state;
struct vsp1_du_crc_config crc;
};
#define to_rcar_crtc_state(s) container_of(s, struct rcar_du_crtc_state, state)
enum rcar_du_output {
RCAR_DU_OUTPUT_DPAD0,
RCAR_DU_OUTPUT_DPAD1,

6
drivers/gpu/drm/rcar-du/rcar_du_vsp.c
View File

@ -40,6 +40,8 @@ static void rcar_du_vsp_complete(void *private, bool completed, u32 crc)
if (completed)
rcar_du_crtc_finish_page_flip(crtc);
drm_crtc_add_crc_entry(&crtc->crtc, false, 0, &crc);
}
void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
@ -103,6 +105,10 @@ void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
{
struct vsp1_du_atomic_pipe_config cfg = { { 0, } };
struct rcar_du_crtc_state *state;
state = to_rcar_crtc_state(crtc->crtc.state);
cfg.crc = state->crc;
vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
}