git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-23 05:56:14 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/display: Enabling eDP no power sequencing with DAL feature mask

Browse Source 
[Why]
Sometimes, DP receiver chip power-controlled externally by an
Embedded Controller could be treated and used as eDP,
if it drives mobile display. In this case,
we shouldn't be doing power-sequencing, hence we can skip
waiting for T7-ready and T9-ready."

[How]
Added a feature mask to enable eDP no power sequencing feature.

To enable this, set 0x10 flag in amdgpu.dcfeaturemask on
Linux command line.

Signed-off-by: Zhan Liu <zhan.liu@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Zhan Liu
2021-06-14 14:54:14 -04:00
committed by Alex Deucher
parent b322a50d17
commit a51482458d
5 changed files with 38 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/amd/include/amd_shared.h
View File

@@ -223,10 +223,12 @@ enum amd_harvest_ip_mask {
};
enum DC_FEATURE_MASK {
DC_FBC_MASK = 0x1,
DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2,
DC_DISABLE_FRACTIONAL_PWM_MASK = 0x4,
DC_PSR_MASK = 0x8,
//Default value can be found at "uint amdgpu_dc_feature_mask"
DC_FBC_MASK = (1 << 0), //0x1, disabled by default
DC_MULTI_MON_PP_MCLK_SWITCH_MASK = (1 << 1), //0x2, enabled by default
DC_DISABLE_FRACTIONAL_PWM_MASK = (1 << 2), //0x4, disabled by default
DC_PSR_MASK = (1 << 3), //0x8, disabled by default
DC_EDP_NO_POWER_SEQUENCING = (1 << 4), //0x10, disabled by default
};
enum DC_DEBUG_MASK {