[PATCH v4 16/16] drm/msm/dpu: sync mode_config limits to the FB limits in dpu_plane.c

[Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>]

Lift mode_config limits set by the DPU driver to the actual FB limits as
handled by the dpu_plane.c. Move 2*max_lm_width check where it belongs,
to the drm_crtc_helper_funcs::mode_valid() callback.

Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Tested-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 15 +++++++++++++++
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  |  9 ++-------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 2a87dd7188b8..f4ec3df45536 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1235,6 +1235,20 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
 	return 0;
 }
 
+static enum drm_mode_status dpu_crtc_mode_valid(struct drm_crtc *crtc,
+						const struct drm_display_mode *mode)
+{
+	struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
+
+	/*
+	 * max crtc width is equal to the max mixer width * 2 and max height is
+	 * is 4K
+	 */
+	return drm_mode_validate_size(mode,
+				      2 * dpu_kms->catalog->caps->max_mixer_width,
+				      4096);
+}
+
 int dpu_crtc_vblank(struct drm_crtc *crtc, bool en)
 {
 	struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc);
@@ -1450,6 +1464,7 @@ static const struct drm_crtc_helper_funcs dpu_crtc_helper_funcs = {
 	.atomic_check = dpu_crtc_atomic_check,
 	.atomic_begin = dpu_crtc_atomic_begin,
 	.atomic_flush = dpu_crtc_atomic_flush,
+	.mode_valid = dpu_crtc_mode_valid,
 	.get_scanout_position = dpu_crtc_get_scanout_position,
 };
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 40e4b829b9da..1c86f22859fa 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1191,13 +1191,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 
-	/*
-	 * max crtc width is equal to the max mixer width * 2 and max height is
-	 * is 4K
-	 */
-	dev->mode_config.max_width =
-			dpu_kms->catalog->caps->max_mixer_width * 2;
-	dev->mode_config.max_height = 4096;
+	dev->mode_config.max_width = DPU_MAX_IMG_WIDTH;
+	dev->mode_config.max_height = DPU_MAX_IMG_HEIGHT;
 
 	dev->max_vblank_count = 0xffffffff;
 	/* Disable vblank irqs aggressively for power-saving */

-- 
2.39.2