drm/amd/display: update DSC MST DP virtual DPCD peer device enumeration policy

[why]
Current policy assumes virtual DPCD peer device as
an individual MST branch device with 1 input and 1 output.
However this is only true for virtual DP-to-DP peer device.
In general there are three types of virtual DP peer devices.
1. Sink peer device with virtual DPCD.
2. Virtual DP-to-DP Peer device with virtual DPCD.
3. Virtual DP-to-HDMI Protocol Converter Peer Device with
Virtual DPCD.
So we should break the assumption and handle all three types.

[how]
DP-to-DP peer device will have virtual DPCD cap upstream.
Sink peer device will have virtual DPCD on the logical port.
Dp to HDMI protocol converter peer device will have virtual DPCD
on its converter port.
For DSC capable Synaptics non VGA port we workaround by enumerating
a virutal DPCD peer device on its upstream
even if it doesn't have one.

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 0 insertions, 168 deletions

diff --git a/drivers/gpu/drm/amd/display/include/dpcd_structs.h b/drivers/gpu/drm/amd/display/include/dpcd_structs.h
deleted file mode 100644
index ca9c5e0c062f..000000000000
--- a/drivers/gpu/drm/amd/display/include/dpcd_structs.h
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * dpcd_structs.h
- *
- *  Created on: Oct 31, 2018
- *      Author: jlei
- */
-
-#ifndef DAL_INCLUDE_DPCD_STRUCTS_H_
-#define DAL_INCLUDE_DPCD_STRUCTS_H_
-
-struct dpcd_receive_port0_cap01 {
-	union {
-		struct {
-			// Byte 0
-			unsigned char reserved0				:1; // Bit0
-			unsigned char local_edid_present		:1;
-			unsigned char associated_to_preceding_port	:1;
-			unsigned char hblank_expansion_capable		:1;
-			unsigned char buffer_size_unit			:1; // Bit4
-			unsigned char buffer_size_per_port		:1;
-			unsigned char reserved1				:2;
-
-			// Byte 1
-			unsigned char buffer_size			:8;
-		} fields;
-		unsigned char raw[2];
-	};
-};
-
-#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-
-struct dpcd_dsc_basic_capabilities {
-	union {
-		struct {
-			// Byte 0
-			struct {
-				unsigned char dsc_support		:1; // Bit0
-				unsigned char dsc_passthrough_support	:1; // Bit1
-				unsigned char reserved			:6;
-			} dsc_support;
-
-			// Byte 1
-			struct {
-				unsigned char dsc_version_major	:4;
-				unsigned char dsc_version_minor	:4;
-			} dsc_algorithm_revision;
-
-			// Byte 2
-			struct {
-				unsigned char rc_block_buffer_size	:2;
-				unsigned char reserved	:6;
-			} dsc_rc_buffer_block_size;
-
-			// Byte 3
-			unsigned char dsc_rc_buffer_size;
-
-			// Byte 4
-			struct {
-				unsigned char one_slice_per_dp_dsc_sink_device		:1; // Bit0
-				unsigned char two_slices_per_dp_dsc_sink_device		:1;
-				unsigned char reserved					:1;
-				unsigned char four_slices_per_dp_dsc_sink_device	:1;
-				unsigned char six_slices_per_dp_dsc_sink_device		:1; // Bit 4
-				unsigned char eight_slices_per_dp_dsc_sink_device	:1;
-				unsigned char ten_slices_per_dp_dsc_sink_device		:1;
-				unsigned char twelve_slices_per_dp_dsc_sink_device	:1;
-			} dsc_slice_capabilities_1;
-
-			// Byte 5
-			struct {
-				unsigned char line_buffer_bit_depth	:4;
-				unsigned char reserved			:4;
-			} dsc_line_buffer_bit_depth;
-
-			// Byte 6
-			struct {
-				unsigned char block_prediction_support	:1;
-				unsigned char reserved			:7;
-			} dsc_block_prediction_support;
-
-			// Byte 7,8
-			struct {
-				unsigned char maximum_bits_per_pixel_supported_by_the_decompressor_low	:7;
-				unsigned char maximum_bits_per_pixel_supported_by_the_decompressor_high	:7;
-			} maximum_bits_per_pixel_supported_by_the_decompressor;
-
-			// Byte 9
-			struct {
-				unsigned char rgb_support			:1; // Bit0
-				unsigned char y_cb_cr_444_support		:1;
-				unsigned char y_cb_cr_simple_422_support	:1;
-				unsigned char y_cb_cr_native_422_support	:1;
-				unsigned char y_cb_cr_native_420_support	:1; // Bit 4
-				unsigned char reserved				:3;
-			} dsc_decoder_color_format_capabilities;
-
-			// Byte 10
-			struct {
-				unsigned char reserved0				:1; // Bit0
-				unsigned char eight_bits_per_color_support	:1;
-				unsigned char ten_bits_per_color_support	:1;
-				unsigned char twelve_bits_per_color_support	:1;
-				unsigned char reserved1				:4; // Bit 4
-			} dsc_decoder_color_depth_capabilities;
-
-			// Byte 11
-			struct {
-				unsigned char throughput_mode_0			:4;
-				unsigned char throughput_mode_1			:4;
-			} peak_dsc_throughput_dsc_sink;
-
-			// Byte 12
-			unsigned char dsc_maximum_slice_width;
-
-			// Byte 13
-			struct {
-				unsigned char sixteen_slices_per_dsc_sink_device	:1;
-				unsigned char twenty_slices_per_dsc_sink_device		:1;
-				unsigned char twentyfour_slices_per_dsc_sink_device	:1;
-				unsigned char reserved					:5;
-			} dsc_slice_capabilities_2;
-
-			// Byte 14
-			unsigned char reserved;
-
-			// Byte 15
-			struct {
-				unsigned char increment_of_bits_per_pixel_supported	:3;
-				unsigned char reserved					:5;
-			} bits_per_pixel_increment;
-		} fields;
-		unsigned char raw[16];
-	};
-};
-
-struct dpcd_dsc_ext_capabilities {
-	union {
-		struct {
-			unsigned char branch_overall_throughput_0; // Byte 0
-			unsigned char branch_overall_throughput_1; // Byte 1
-			unsigned char branch_max_line_width; // Byte 2
-		} fields;
-		unsigned char raw[3];
-	};
-};
-
-struct dpcd_dsc_capabilities {
-	struct dpcd_dsc_basic_capabilities dsc_basic_caps;
-	struct dpcd_dsc_ext_capabilities dsc_ext_caps;
-};
-
-struct dpcd_fec_capability {
-	union {
-		struct {
-			// Byte 0
-			unsigned char fec_capable				:1; // Bit0
-			unsigned char uncorrected_block_error_count_capable	:1;
-			unsigned char corrected_block_error_count_capable	:1;
-			unsigned char bit_error_count_capable			:1;
-			unsigned char reserved					:4; // Bit4
-		} fields;
-		unsigned char raw[1];
-	};
-};
-
-#endif
-
-#endif /* DAL_INCLUDE_DPCD_STRUCTS_H_ */