There might be some comp that doesn't have funcs, eg. hdmi-connector.
Check for comp->funcs otherwise there will be NULL pointer dereference
crash.
Fixes: bd3de8cd782b ("drm/mediatek: Add gamma property according to hardware capability")
Fixes: 7395eab077f9 ("drm/mediatek: Add ctm property support")
Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
---
This patch is based on mediatek's drm branch:
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-next-5.6
After
https://patchwork.freedesktop.org/patch/344477/?series=63328&rev=59,
there will also be funcs for hdmi-connector.
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index fb142fcfc353..7b392d6c71cc 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -808,11 +808,13 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
mtk_crtc->ddp_comp[i] = comp;
- if (comp->funcs->ctm_set)
- has_ctm = true;
+ if (comp->funcs) {
+ if (comp->funcs->ctm_set)
+ has_ctm = true;
- if (comp->funcs->gamma_set)
- gamma_lut_size = MTK_LUT_SIZE;
+ if (comp->funcs->gamma_set)
+ gamma_lut_size = MTK_LUT_SIZE;
+ }
}
for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
--
2.25.0.rc1.283.g88dfdc4193-goog
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