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drm/vc4: Fix bitwise OR versus ternary operator in vc4_plane_mode_set
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Clang warns:

drivers/gpu/drm/vc4/vc4_plane.c:901:27: warning: operator '?:' has lower
precedence than '|'; '|' will be evaluated first
[-Wbitwise-conditional-parentheses]
                                fb->format->has_alpha ?
                                ~~~~~~~~~~~~~~~~~~~~~ ^
drivers/gpu/drm/vc4/vc4_plane.c:901:27: note: place parentheses around
the '|' expression to silence this warning
                                fb->format->has_alpha ?
                                ~~~~~~~~~~~~~~~~~~~~~ ^
drivers/gpu/drm/vc4/vc4_plane.c:901:27: note: place parentheses around
the '?:' expression to evaluate it first
                                fb->format->has_alpha ?
                                ~~~~~~~~~~~~~~~~~~~~~~^
1 warning generated.

Add the parentheses as that was clearly intended, otherwise
SCALER5_CTL2_ALPHA_PREMULT won't be added to the list.

Fixes: c54619b ("drm/vc4: Add support for the BCM2711 HVS5")
Signed-off-by: Nathan Chancellor <[email protected]>
Link: ClangBuiltLinux/linux#1150
Signed-off-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
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nathanchance authored and popcornmix committed Sep 13, 2020
1 parent b727d99 commit 2aa8dbe
Showing 1 changed file with 2 additions and 2 deletions.
4 changes: 2 additions & 2 deletions drivers/gpu/drm/vc4/vc4_plane.c
Original file line number Diff line number Diff line change
Expand Up @@ -965,8 +965,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(state->alpha >> 4,
SCALER5_CTL2_ALPHA) |
fb->format->has_alpha ?
SCALER5_CTL2_ALPHA_PREMULT : 0 |
(fb->format->has_alpha ?
SCALER5_CTL2_ALPHA_PREMULT : 0) |
(mix_plane_alpha ?
SCALER5_CTL2_ALPHA_MIX : 0) |
VC4_SET_FIELD(fb->format->has_alpha ?
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