diff options
Diffstat (limited to 'libre/linux-libre-pae/0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch')
| -rw-r--r-- | libre/linux-libre-pae/0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/libre/linux-libre-pae/0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch b/libre/linux-libre-pae/0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch deleted file mode 100644 index 4c162d00b..000000000 --- a/libre/linux-libre-pae/0014-drm-amdgpu-Add-DC-feature-mask-to-disable-fractional.patch +++ /dev/null @@ -1,80 +0,0 @@ -From f247d4a6fe42acc60b775457e3c35b8289532590 Mon Sep 17 00:00:00 2001 -From: Leo Li <sunpeng.li@amd.com> -Date: Mon, 21 Oct 2019 14:58:47 -0400 -Subject: [PATCH 14/15] drm/amdgpu: Add DC feature mask to disable fractional - pwm -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -[Why] - -Some LED panel drivers might not like fractional PWM. In such cases, -backlight flickering may be observed. - -[How] - -Add a DC feature mask to disable fractional PWM, and associate it with -the preexisting dc_config flag. - -The flag is only plumbed through the dmcu firmware, so plumb it through -the driver path as well. - -To disable, add the following to the linux cmdline: -amdgpu.dcfeaturemask=0x4 - -Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204957 -Signed-off-by: Leo Li <sunpeng.li@amd.com> -Reviewed-by: Anthony Koo <anthony.koo@amd.com> -Tested-by: Lukáš Krejčí <lskrejci@gmail.com> -Signed-off-by: Alex Deucher <alexander.deucher@amd.com> ---- - drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++ - drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 4 ++++ - drivers/gpu/drm/amd/include/amd_shared.h | 1 + - 3 files changed, 8 insertions(+) - -diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c -index 4e9c15c409ba..25b72eb76add 100644 ---- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c -+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c -@@ -697,6 +697,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) - if (amdgpu_dc_feature_mask & DC_MULTI_MON_PP_MCLK_SWITCH_MASK) - init_data.flags.multi_mon_pp_mclk_switch = true; - -+ if (amdgpu_dc_feature_mask & DC_DISABLE_FRACTIONAL_PWM_MASK) -+ init_data.flags.disable_fractional_pwm = true; -+ - init_data.flags.power_down_display_on_boot = true; - - #ifdef CONFIG_DRM_AMD_DC_DCN2_0 -diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c -index 7700a855d77c..698b84acc44f 100644 ---- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c -+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c -@@ -404,6 +404,10 @@ static bool dce_abm_init_backlight(struct abm *abm) - /* Enable the backlight output */ - REG_UPDATE(BL_PWM_CNTL, BL_PWM_EN, 1); - -+ /* Disable fractional pwm if configured */ -+ REG_UPDATE(BL_PWM_CNTL, BL_PWM_FRACTIONAL_EN, -+ abm->ctx->dc->config.disable_fractional_pwm ? 0 : 1); -+ - /* Unlock group 2 backlight registers */ - REG_UPDATE(BL_PWM_GRP1_REG_LOCK, - BL_PWM_GRP1_REG_LOCK, 0); -diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h -index 8889aaceec60..5450ed762b7a 100644 ---- a/drivers/gpu/drm/amd/include/amd_shared.h -+++ b/drivers/gpu/drm/amd/include/amd_shared.h -@@ -143,6 +143,7 @@ enum PP_FEATURE_MASK { - enum DC_FEATURE_MASK { - DC_FBC_MASK = 0x1, - DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2, -+ DC_DISABLE_FRACTIONAL_PWM_MASK = 0x4, - }; - - enum amd_dpm_forced_level; --- -2.25.0 - |