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>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 667f099e84af..d33fb4174b13 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1073,6 +1073,21 @@ static struct radeon_atom_ss *radeon_atombios_get_ss_info(struct
         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 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
                 } else
                         lvds->pll_algo = PLL_ALGO_LEGACY;
 
+                /* LVDS quirks */
+                radeon_atom_apply_lvds_quirks(dev, lvds);
+
                 encoder->native_mode = lvds->native_mode;
         }
         return lvds;