drm/radeon/kms: add pll quirk for toshiba laptop panel
The panel on the Toshiba A300-1BU laptop does not like the
PLL dividers selected by the avivo pll algo, but works fine
using the older method. Add a quirk to handle it.
Should fix fdo bug 26358.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 667f099..d33fb41 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1073,6 +1073,21 @@
return ss;
}
+static void radeon_atom_apply_lvds_quirks(struct drm_device *dev,
+ struct radeon_encoder_atom_dig *lvds)
+{
+
+ /* Toshiba A300-1BU laptop panel doesn't like new pll divider algo */
+ if ((dev->pdev->device == 0x95c4) &&
+ (dev->pdev->subsystem_vendor == 0x1179) &&
+ (dev->pdev->subsystem_device == 0xff50)) {
+ if ((lvds->native_mode.hdisplay == 1280) &&
+ (lvds->native_mode.vdisplay == 800))
+ lvds->pll_algo = PLL_ALGO_LEGACY;
+ }
+
+}
+
union lvds_info {
struct _ATOM_LVDS_INFO info;
struct _ATOM_LVDS_INFO_V12 info_12;
@@ -1151,6 +1166,9 @@
} else
lvds->pll_algo = PLL_ALGO_LEGACY;
+ /* LVDS quirks */
+ radeon_atom_apply_lvds_quirks(dev, lvds);
+
encoder->native_mode = lvds->native_mode;
}
return lvds;