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drm/amd/display: Get panel replay capability from DPCD

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[Why&How]
Read Panel replay caps from DPCD when retrieving link capability

Reviewed-by: Robin Chen <robin.chen@amd.com>
Signed-off-by: Jack Chang <jack.chang@amd.com>
Signed-off-by: Leon Huang <Leon.Huang1@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jack Chang
2025-08-20 16:59:08 +08:00
committed by Alex Deucher
parent 2e6c79e473
commit c798836bb7
2 changed files with 16 additions and 0 deletions
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11
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@@ -1157,6 +1157,16 @@ struct dprx_states {
bool cable_id_written;
};
union dpcd_panel_replay_capability_supported {
struct {
unsigned char PANEL_REPLAY_SUPPORT :1;
unsigned char SELECTIVE_UPDATE_SUPPORT :1;
unsigned char EARLY_TRANSPORT_SUPPORT :1;
unsigned char RESERVED :5;
} bits;
unsigned char raw;
};
enum dpcd_downstream_port_max_bpc {
DOWN_STREAM_MAX_8BPC = 0,
DOWN_STREAM_MAX_10BPC,
@@ -1280,6 +1290,7 @@ struct dpcd_caps {
struct edp_psr_info psr_info;
struct replay_info pr_info;
union dpcd_panel_replay_capability_supported pr_caps_supported;
uint16_t edp_oled_emission_rate;
union dp_receive_port0_cap receive_port0_cap;
/* Indicates the number of SST links supported by MSO (Multi-Stream Output) */

5
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
View File

@@ -2091,6 +2091,11 @@ static bool retrieve_link_cap(struct dc_link *link)
link->dpcd_caps.max_uncompressed_pixel_rate_cap.raw,
sizeof(link->dpcd_caps.max_uncompressed_pixel_rate_cap.raw));
core_link_read_dpcd(link,
DP_PANEL_REPLAY_CAPABILITY_SUPPORT,
&link->dpcd_caps.pr_caps_supported.raw,
sizeof(link->dpcd_caps.pr_caps_supported.raw));
/* Read DP tunneling information. */
status = dpcd_get_tunneling_device_data(link);
if (status != DC_OK)