drm/radeon/kms/atom/dce3: fix up usPixelClock calculation for Transmitter tables

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index 2aa5994a29d5..355b0fbed927 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -725,10 +725,10 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action)
 
         if (ASIC_IS_DCE32(rdev)) {
                 if (radeon_encoder->pixel_clock > 165000) {
-                        args.v2.usPixelClock = cpu_to_le16((radeon_encoder->pixel_clock * 10 * 2) / 100);
+                        args.v2.usPixelClock = cpu_to_le16((radeon_encoder->pixel_clock / 2) / 10);
                         args.v2.acConfig.fDualLinkConnector = 1;
                 } else {
-                        args.v2.usPixelClock = cpu_to_le16((radeon_encoder->pixel_clock * 10 * 4) / 100);
+                        args.v2.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
                 }
                 if (dig->dig_block)
                         args.v2.acConfig.ucEncoderSel = 1;
@@ -754,7 +754,10 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action)
                 }
         } else {
                 args.v1.ucConfig = ATOM_TRANSMITTER_CONFIG_CLKSRC_PPLL;
-                args.v1.usPixelClock = cpu_to_le16((radeon_encoder->pixel_clock) / 10);
+                if (radeon_encoder->pixel_clock > 165000)
+                        args.v1.usPixelClock = cpu_to_le16((radeon_encoder->pixel_clock / 2) / 10);
+                else
+                        args.v1.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
 
                 switch (radeon_encoder->encoder_id) {
                 case ENCODER_OBJECT_ID_INTERNAL_UNIPHY: