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authorVille Syrjälä <ville.syrjala@linux.intel.com>2022-10-20 12:39:38 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-02-01 10:34:35 +0300
commit7fa092a05791b17414e8888a07b1e3ef3f86633e (patch)
tree632f9e33b99cd79d658335fd2a8d74f6872286e0 /drivers/gpu/drm/i915/display
parent83b15fe00a45c5c24fed1b3398b77508980eca96 (diff)
downloadlinux-7fa092a05791b17414e8888a07b1e3ef3f86633e.tar.xz
drm/i915: Allow panel fixed modes to have differing sync polarities
[ Upstream commit 2bd0db4b3f0bd529f75b32538fc5a3775e3591c0 ] Apparently some panels declare multiple modes with random sync polarities. Seems a bit weird, but looks like Windows/GOP doesn't care, so let follow suit and accept alternate fixed modes regardless of their sync polarities. v2: Don't pollute the DRM_ namespace with a define (Jani) Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6968 Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221020093938.27200-1-ville.syrjala@linux.intel.com Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/i915/display')
-rw-r--r--drivers/gpu/drm/i915/display/intel_panel.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 41cec9dc4223..f72f4646c0d7 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -85,9 +85,10 @@ static bool is_alt_drrs_mode(const struct drm_display_mode *mode,
static bool is_alt_fixed_mode(const struct drm_display_mode *mode,
const struct drm_display_mode *preferred_mode)
{
- return drm_mode_match(mode, preferred_mode,
- DRM_MODE_MATCH_FLAGS |
- DRM_MODE_MATCH_3D_FLAGS) &&
+ u32 sync_flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC |
+ DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC;
+
+ return (mode->flags & ~sync_flags) == (preferred_mode->flags & ~sync_flags) &&
mode->hdisplay == preferred_mode->hdisplay &&
mode->vdisplay == preferred_mode->vdisplay;
}