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[Oneiric,2/2] drm/radeon/kms: fix TRAVIS panel setup

Message ID 651e8aabdedaa00043c5da7112b6bf85b893cafa.1329290089.git.jesse.sung@canonical.com
State New
Headers show

Commit Message

Wen-chien Jesse Sung Feb. 16, 2012, 8:41 a.m. UTC 
BugLink: http://bugs.launchpad.net/bugs/825777

Different versions of the DP to LVDS bridge chip
need different panel mode settings depending on
the chip version used.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=41569

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 304a48400d9718f74ec35ae46f30868a5f4c4516)
Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
---
 drivers/gpu/drm/radeon/atombios_dp.c |   18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 03a347a..6a1879a 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -564,9 +564,21 @@  static void radeon_dp_set_panel_mode(struct drm_encoder *encoder,
 	    ENCODER_OBJECT_ID_NUTMEG)
 		panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
 	else if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
-		 ENCODER_OBJECT_ID_TRAVIS)
-		panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
-	else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
+		 ENCODER_OBJECT_ID_TRAVIS) {
+		u8 id[6];
+		int i;
+		for (i = 0; i < 6; i++)
+			id[i] = radeon_read_dpcd_reg(radeon_connector, 0x503 + i);
+		if (id[0] == 0x73 &&
+		    id[1] == 0x69 &&
+		    id[2] == 0x76 &&
+		    id[3] == 0x61 &&
+		    id[4] == 0x72 &&
+		    id[5] == 0x54)
+			panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
+		else
+			panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
+	} else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
 		u8 tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
 		if (tmp & 1)
 			panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;