From: Alex Deucher <alexdeucher@gmail.com>
Date: Tue, 2 Feb 2010 17:06:28 +0000 (-0500)
Subject: drm/radeon/kms: add pll quirk for toshiba laptop panel
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=093972788f009cabf8f8fb726dc5267b60b3d09e;p=openwrt%2Fstaging%2Fblogic.git

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 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;