github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-03 20:14:06 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/amd/display: Update test link rate DPCD bit field to match spec

Browse Source 
[Why]
An SCR was made to the DP2.0 spec that updated the bit field definition
for UHBR13.5 in the test link rate DPCD register.

[How]
Add new translation to match the SCR update. Keep old translation for
backwards compatibility.

Reviewed-by: Wenjing Liu <wenjing.liu@amd.com>
Acked-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
George Shen 2023-10-19 22:03:41 -04:00 committed by Alex Deucher
parent 8df0d7d33a
commit f031ba1208
2 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/amd/display/dc/dc_dp_types.h
View File

@ -142,7 +142,8 @@ enum dp_test_link_rate {
DP_TEST_LINK_RATE_HBR3 = 0x1E,
DP_TEST_LINK_RATE_UHBR10 = 0x01,
DP_TEST_LINK_RATE_UHBR20 = 0x02,
DP_TEST_LINK_RATE_UHBR13_5 = 0x03,
DP_TEST_LINK_RATE_UHBR13_5_LEGACY = 0x03, /* For backward compatibility*/
DP_TEST_LINK_RATE_UHBR13_5 = 0x04,
};
struct dc_link_settings {

8
drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
View File

@ -53,6 +53,7 @@ static enum dc_link_rate get_link_rate_from_test_link_rate(uint8_t test_rate)
return LINK_RATE_UHBR10;
case DP_TEST_LINK_RATE_UHBR20:
return LINK_RATE_UHBR20;
case DP_TEST_LINK_RATE_UHBR13_5_LEGACY:
case DP_TEST_LINK_RATE_UHBR13_5:
return LINK_RATE_UHBR13_5;
default:
@ -119,6 +120,11 @@ static void dp_test_send_link_training(struct dc_link *link)
1);
link_settings.link_rate = get_link_rate_from_test_link_rate(test_rate);
if (link_settings.link_rate == LINK_RATE_UNKNOWN) {
DC_LOG_ERROR("%s: Invalid test link rate.", __func__);
ASSERT(0);
}
/* Set preferred link settings */
link->verified_link_cap.lane_count = link_settings.lane_count;
link->verified_link_cap.link_rate = link_settings.link_rate;
@ -457,7 +463,7 @@ static void set_crtc_test_pattern(struct dc_link *link,
controller_color_space = pipe_ctx->stream_res.test_pattern_params.color_space;
if (controller_color_space == CONTROLLER_DP_COLOR_SPACE_UDEFINED) {
DC_LOG_WARNING("%s: Color space must be defined for test pattern", __func__);
DC_LOG_ERROR("%s: Color space must be defined for test pattern", __func__);
ASSERT(0);
}