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authorMatthew Garrett <mjg@redhat.com>2011-08-08 16:21:15 +0000
committerDave Airlie <airlied@redhat.com>2011-08-12 11:02:46 +0100
commit13bb9430cd6154d1f088549656c4a3ed10eaf35e (patch)
tree0a8c3e19bcbcb80e5ec9ba06fce9b7e3c8b6aa33 /drivers/gpu/drm
parent92bdfd4a35415dd3741b95df60782a32c586d399 (diff)
drm/radeon: Allow panel preferred EDID to override BIOS native mode
We have two sources of information about panel capabilities on mobile radeon - the BIOS, which gives us a native mode, and the panel's preferred mode. In theory these two will always match, but there's some corner cases where the BIOS hasn't been fully initialised and so the native mode in it ends up with default values. However, if we get a panel with reasonable EDID, it's probably the case that the panel's preferred mode does actually represent the panel capabilities. This patch handles that case by replacing the native mode with the panel's preferred mode if the resolutions don't match. Systems without a valid internal panel EDID will still use the BIOS native mode. Signed-off-by: Matthew Garrett <mjg@redhat.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/radeon/radeon_connectors.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 519b5e2f1ee..441e0705485 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -478,11 +478,19 @@ static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
{
struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
struct drm_display_mode *native_mode = &radeon_encoder->native_mode;
+ struct drm_display_mode *t, *mode;
+
+ /* If the EDID preferred mode doesn't match the native mode, use it */
+ list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
+ if (mode->type & DRM_MODE_TYPE_PREFERRED) {
+ if (mode->hdisplay != native_mode->hdisplay ||
+ mode->vdisplay != native_mode->vdisplay)
+ memcpy(native_mode, mode, sizeof(*mode));
+ }
+ }
/* Try to get native mode details from EDID if necessary */
if (!native_mode->clock) {
- struct drm_display_mode *t, *mode;
-
list_for_each_entry_safe(mode, t, &connector->probed_modes, head) {
if (mode->hdisplay == native_mode->hdisplay &&
mode->vdisplay == native_mode->vdisplay) {
@@ -493,6 +501,7 @@ static void radeon_fixup_lvds_native_mode(struct drm_encoder *encoder,
}
}
}
+
if (!native_mode->clock) {
DRM_DEBUG_KMS("No LVDS native mode details, disabling RMX\n");
radeon_encoder->rmx_type = RMX_OFF;