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Subject[patch 34/86] drm/radeon/kms: fix TRAVIS panel setup
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------
From: Alex Deucher <alexander.deucher@amd.com>

commit 304a48400d9718f74ec35ae46f30868a5f4c4516 upstream.

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>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/radeon/atombios_dp.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -564,9 +564,21 @@ int radeon_dp_get_panel_mode(struct drm_
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;



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