Update CMM settings at in the atomic commit tail helper method.
The CMM is updated with new gamma values provided to the driver
in the GAMMA_LUT blob property.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 35 +++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index b79cda2f5531..f9aece78ca5f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
@@ -21,6 +21,7 @@
#include <linux/of_platform.h>
#include <linux/wait.h>
+#include "rcar_cmm.h"
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_encoder.h"
@@ -287,6 +288,37 @@ rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
* Atomic Check and Update
*/
+static void rcar_du_atomic_commit_update_cmm(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_state)
+{
+ struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+ struct rcar_cmm_config cmm_config = {};
+
+ if (!rcrtc->cmm || !crtc->state->color_mgmt_changed)
+ return;
+
+ if (!crtc->state->gamma_lut) {
+ cmm_config.lut.enable = false;
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+
+ return;
+ }
+
+ cmm_config.lut.enable = true;
+ cmm_config.lut.table = (struct drm_color_lut *)
+ crtc->state->gamma_lut->data;
+
+ /* Set LUT table size to 0 if entries should not be updated. */
+ if (!old_state->gamma_lut ||
+ old_state->gamma_lut->base.id != crtc->state->gamma_lut->base.id)
+ cmm_config.lut.size = crtc->state->gamma_lut->length
+ / sizeof(cmm_config.lut.table[0]);
+ else
+ cmm_config.lut.size = 0;
+
+ rcar_cmm_setup(rcrtc->cmm, &cmm_config);
+}
+
static int rcar_du_atomic_check(struct drm_device *dev,
struct drm_atomic_state *state)
{
@@ -329,6 +361,9 @@ static void rcar_du_atomic_commit_tail(struct drm_atomic_state *old_state)
rcdu->dpad1_source = rcrtc->index;
}
+ for_each_old_crtc_in_state(old_state, crtc, crtc_state, i)
+ rcar_du_atomic_commit_update_cmm(crtc, crtc_state);
+
/* Apply the atomic update. */
drm_atomic_helper_commit_modeset_disables(dev, old_state);
drm_atomic_helper_commit_planes(dev, old_state,
--
2.21.0
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