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| author |   Yongqiang Niu <yongqiang.niu@mediatek.com> | 2021-01-11 15:43:44 +0800 |
|---|---|---|
| committer |   Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2021-02-04 22:52:55 +0800 |
| commit | b1d685b6467ac0d98fc63989f71b4ca9186be5d4 (patch) | |
| tree | acdf235b465c192691e35c8763073b8cfc9803b8 | |
| parent | dt-bindings: mediatek: add description for mt8192 display (diff) | |
| download | wireguard-linux-b1d685b6467ac0d98fc63989f71b4ca9186be5d4.tar.xz wireguard-linux-b1d685b6467ac0d98fc63989f71b4ca9186be5d4.zip | |
drm/mediatek: Check if fb is null
It's possible that state->base.fb is null. Add a check before access its
format.
Fixes: b6b1bb980ec4 ("drm/mediatek: Turn off Alpha bit when plane format has no alpha")
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c index 266c5c5ca280..1c295c58a5e8 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c @@ -291,7 +291,7 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx, } con = ovl_fmt_convert(ovl, fmt); - if (state->base.fb->format->has_alpha) + if (state->base.fb && state->base.fb->format->has_alpha) con |= OVL_CON_AEN | OVL_CON_ALPHA; if (pending->rotation & DRM_MODE_REFLECT_Y) { |