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drm/amd/display: Add monitor patch for AUO dpcd issue

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[Why]
dpcd cap mismatch in 2200 vs base

[How]
Add monitor patch which using based caps to overwrite 2200

Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lewis Huang 2019-12-24 09:50:21 +08:00 committed by Alex Deucher
parent 4134aaa11b
commit 8547058b17
4 changed files with 74 additions and 0 deletions
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7
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View file

@ -3371,3 +3371,10 @@ const struct dc_link_settings *dc_link_get_link_cap(
return &link->preferred_link_setting;
return &link->verified_link_cap;
}
void dc_link_overwrite_extended_receiver_cap(
struct dc_link *link)
{
dp_overwrite_extended_receiver_cap(link);
}

62
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
View file

@ -3446,6 +3446,68 @@ static bool retrieve_link_cap(struct dc_link *link)
return true;
}
bool dp_overwrite_extended_receiver_cap(struct dc_link *link)
{
uint8_t dpcd_data[16];
uint32_t read_dpcd_retry_cnt = 3;
enum dc_status status = DC_ERROR_UNEXPECTED;
union dp_downstream_port_present ds_port = { 0 };
union down_stream_port_count down_strm_port_count;
union edp_configuration_cap edp_config_cap;
int i;
for (i = 0; i < read_dpcd_retry_cnt; i++) {
status = core_link_read_dpcd(
link,
DP_DPCD_REV,
dpcd_data,
sizeof(dpcd_data));
if (status == DC_OK)
break;
}
link->dpcd_caps.dpcd_rev.raw =
dpcd_data[DP_DPCD_REV - DP_DPCD_REV];
if (dpcd_data[DP_MAX_LANE_COUNT - DP_DPCD_REV] == 0)
return false;
ds_port.byte = dpcd_data[DP_DOWNSTREAMPORT_PRESENT -
DP_DPCD_REV];
get_active_converter_info(ds_port.byte, link);
down_strm_port_count.raw = dpcd_data[DP_DOWN_STREAM_PORT_COUNT -
DP_DPCD_REV];
link->dpcd_caps.allow_invalid_MSA_timing_param =
down_strm_port_count.bits.IGNORE_MSA_TIMING_PARAM;
link->dpcd_caps.max_ln_count.raw = dpcd_data[
DP_MAX_LANE_COUNT - DP_DPCD_REV];
link->dpcd_caps.max_down_spread.raw = dpcd_data[
DP_MAX_DOWNSPREAD - DP_DPCD_REV];
link->reported_link_cap.lane_count =
link->dpcd_caps.max_ln_count.bits.MAX_LANE_COUNT;
link->reported_link_cap.link_rate = dpcd_data[
DP_MAX_LINK_RATE - DP_DPCD_REV];
link->reported_link_cap.link_spread =
link->dpcd_caps.max_down_spread.bits.MAX_DOWN_SPREAD ?
LINK_SPREAD_05_DOWNSPREAD_30KHZ : LINK_SPREAD_DISABLED;
edp_config_cap.raw = dpcd_data[
DP_EDP_CONFIGURATION_CAP - DP_DPCD_REV];
link->dpcd_caps.panel_mode_edp =
edp_config_cap.bits.ALT_SCRAMBLER_RESET;
link->dpcd_caps.dpcd_display_control_capable =
edp_config_cap.bits.DPCD_DISPLAY_CONTROL_CAPABLE;
return true;
}
bool detect_dp_sink_caps(struct dc_link *link)
{
return retrieve_link_cap(link);

3
drivers/gpu/drm/amd/display/dc/dc_link.h
View file

@ -301,6 +301,9 @@ uint32_t dc_link_bandwidth_kbps(
const struct dc_link_settings *dc_link_get_link_cap(
const struct dc_link *link);
void dc_link_overwrite_extended_receiver_cap(
struct dc_link *link);
bool dc_submit_i2c(
struct dc *dc,
uint32_t link_index,

2
drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h
View file

@ -76,6 +76,8 @@ void dp_enable_mst_on_sink(struct dc_link *link, bool enable);
enum dp_panel_mode dp_get_panel_mode(struct dc_link *link);
void dp_set_panel_mode(struct dc_link *link, enum dp_panel_mode panel_mode);
bool dp_overwrite_extended_receiver_cap(struct dc_link *link);
void dp_set_fec_ready(struct dc_link *link, bool ready);
void dp_set_fec_enable(struct dc_link *link, bool enable);
bool dp_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable);