drm/radeon: fix dig encoder selection on DCE61

Was using the DCE41 code which was wrong. Fixes
blank displays on a number of Trinity systems.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 4a7f95e5550da09bb0182c1a3d706b2715c4e675..6e8803a1170c24b052a0193ce58294605fed01fd 100644 (file)
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1769,13 +1769,34 @@ static int radeon_atom_pick_dig_encoder(struct drm_encoder *encoder)
        struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
        struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
        struct drm_encoder *test_encoder;
-       struct radeon_encoder_atom_dig *dig;
+       struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
        uint32_t dig_enc_in_use = 0;
 
-       /* DCE4/5 */
-       if (ASIC_IS_DCE4(rdev)) {
-               dig = radeon_encoder->enc_priv;
-               if (ASIC_IS_DCE41(rdev)) {
+       if (ASIC_IS_DCE6(rdev)) {
+               /* DCE6 */
+               switch (radeon_encoder->encoder_id) {
+               case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+                       if (dig->linkb)
+                               return 1;
+                       else
+                               return 0;
+                       break;
+               case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+                       if (dig->linkb)
+                               return 3;
+                       else
+                               return 2;
+                       break;
+               case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+                       if (dig->linkb)
+                               return 5;
+                       else
+                               return 4;
+                       break;
+               }
+       } else if (ASIC_IS_DCE4(rdev)) {
+               /* DCE4/5 */
+               if (ASIC_IS_DCE41(rdev) && !ASIC_IS_DCE61(rdev)) {
                        /* ontario follows DCE4 */
                        if (rdev->family == CHIP_PALM) {
                                if (dig->linkb)