[PATCH v3 9/9] drm/msm/dpu: sync mode_config limits to the FB limits in dpu_plane.c

[Dmitry Baryshkov]

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.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 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 5dbf5254d310..44531666edf2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -1236,6 +1236,20 @@ 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);
@@ -1451,6 +1465,7 @@ 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 0d1dcc94455c..d1b937e127b0 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1147,13 +1147,8 @@ 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