drm/amd/display: Set DSC before DIG front-end is connected to its back-end

[why]
At the time DIG FE is connected to its BE, the clocks in OTG are enabled and
PHY will also be set up. When DSC has to be used to fit the stream into the
available bandwidth, without DSC being set DIG could get exposed to the
higer bandwidth it (or link) could handle. This causes the HW to "reject"
video enable setup (the register shows that video enable was attempted, but
the status bit shows it as disabled).

[how]
- Separate DSC setup into DSC register config and DSC PPS SDP setup

- Move most of the DSC setup (register config) to before
  dcn10_link_encoder_connect_dig_be_to_fe() is  called

- Set up DSC PPS SDP after DIG FE is connected to its BE. This is because
  setting DSC PPS SDP before that has no effect.

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h b/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
index 067ba6fc04c1..8bb3e3d56ac9 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/stream_encoder.h
@@ -122,9 +122,6 @@ struct enc_state {
 #endif
 
 struct stream_encoder_funcs {
-	#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-		void (*enc_read_state)(struct stream_encoder *enc, struct enc_state *s);
-	#endif
 	void (*dp_set_stream_attribute)(
 		struct stream_encoder *enc,
 		struct dc_crtc_timing *crtc_timing,
@@ -219,12 +216,17 @@ struct stream_encoder_funcs {
 
 #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
+	void (*enc_read_state)(struct stream_encoder *enc, struct enc_state *s);
+
 	void (*dp_set_dsc_config)(
 			struct stream_encoder *enc,
 			enum optc_dsc_mode dsc_mode,
 			uint32_t dsc_bytes_per_pixel,
-			uint32_t dsc_slice_width,
-			uint8_t *dsc_packed_pps);
+			uint32_t dsc_slice_width);
+
+	void (*dp_set_dsc_pps_info_packet)(struct stream_encoder *enc,
+				bool enable,
+				uint8_t *dsc_packed_pps);
 #endif
 
 	void (*set_dynamic_metadata)(struct stream_encoder *enc,