[PATCH 2/7] drm/radeon: use hw cts/n values for deep color

[Alex Deucher]

I'm not really sure how these should be calculated
for deep color.  The hw generated values seem to work.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/evergreen_hdmi.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c 
b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index 05b0c95..8579721 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -293,10 +293,12 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, 
struct drm_display_mode
        struct radeon_device *rdev = dev->dev_private;
        struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
        struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
+       struct drm_connector *connector = 
radeon_get_connector_for_encoder(encoder);
        u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
        struct hdmi_avi_infoframe frame;
        uint32_t offset;
        ssize_t err;
+       int bpc = 8;

        if (!dig || !dig->afmt)
                return;
@@ -306,6 +308,12 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, 
struct drm_display_mode
                return;
        offset = dig->afmt->offset;

+       /* hdmi deep color mode general control packets setup, if bpc > 8 */
+       if (encoder->crtc) {
+               struct radeon_crtc *radeon_crtc = to_radeon_crtc(encoder->crtc);
+               bpc = radeon_crtc->bpc;
+       }
+
        /* disable audio prior to setting up hw */
        if (ASIC_IS_DCE6(rdev)) {
                dig->afmt->pin = dce6_audio_get_pin(rdev);
@@ -348,9 +356,13 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, 
struct drm_display_mode

        /* fglrx clears sth in AFMT_AUDIO_PACKET_CONTROL2 here */

-       WREG32(HDMI_ACR_PACKET_CONTROL + offset,
-              HDMI_ACR_SOURCE | /* select SW CTS value */
-              HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets when 
required */
+       if (bpc > 8)
+               WREG32(HDMI_ACR_PACKET_CONTROL + offset,
+                      HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets 
when required */
+       else
+               WREG32(HDMI_ACR_PACKET_CONTROL + offset,
+                      HDMI_ACR_SOURCE | /* select SW CTS value */
+                      HDMI_ACR_AUTO_SEND); /* allow hw to sent ACR packets 
when required */

        evergreen_hdmi_update_ACR(encoder, mode->clock);

-- 
1.8.3.1