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@xxxxxxxxxxxxxxxx>
---
Changes since v1:
- Format the source names using plane IDs instead of plane indices
---
drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 156 +++++++++++++++++++++++++++++++--
drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 19 ++++
drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 7 ++
3 files changed, 176 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index c4420538ec85..d71d709fe3d9 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -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, ©->state);
+
+ return ©->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);
@@ -710,15 +756,111 @@ 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 = 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 = 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,
+ .set_crc_source = rcar_du_crtc_set_crc_source,
};
/* -----------------------------------------------------------------------------
@@ -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;
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index fdc2bf99bda1..518ee2c60eb8 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -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 +71,23 @@ 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.source: source for CRC calculation
+ * @crc.index: index of the CRC source plane (when crc.source is set to plane)
+ */
+struct rcar_du_crtc_state {
+ struct drm_crtc_state state;
+
+ struct {
+ enum vsp1_du_crc_source source;
+ unsigned int index;
+ } 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,
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
index bdcec201591f..ce19b883ad16 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
@@ -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 +105,11 @@ 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.source = state->crc.source;
+ cfg.crc.index = state->crc.index;
vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
}
--
Regards,
Laurent Pinchart
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