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drm/amd/display: Add power down display on boot flag

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[Why]

Due to the generic introduction of seamless boot, the display is no
longer blanked upon boot. However, this causes corruption on some
systems that does not lock the memory in the non-secure boot case,
resulting in brief corruption on boot due to garbage being written into
the frame buffer.

[How]
Add a flag, read during DC init, to determine whether display should be
blanked on boot. Default to true.

Signed-off-by: Thomas Lim <Thomas.Lim@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Thomas Lim 2019-04-10 17:06:07 -04:00 committed by Alex Deucher
parent 91f287566d
commit 27eaa4927d
3 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
View File

@ -534,6 +534,8 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
if (amdgpu_dc_feature_mask & DC_FBC_MASK)
init_data.flags.fbc_support = true;
init_data.flags.power_down_display_on_boot = true;
/* Display Core create. */
adev->dm.dc = dc_create(&init_data);

1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -204,6 +204,7 @@ struct dc_config {
bool optimize_edp_link_rate;
bool disable_fractional_pwm;
bool allow_seamless_boot_optimization;
bool power_down_display_on_boot;
};
enum visual_confirm {

2
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View File

@ -1118,7 +1118,7 @@ static void dcn10_init_hw(struct dc *dc)
* Otherwise, if taking control is not possible, we need to power
* everything down.
*/
if (dcb->funcs->is_accelerated_mode(dcb)) {
if (dcb->funcs->is_accelerated_mode(dcb) || dc->config.power_down_display_on_boot) {
for (i = 0; i < dc->res_pool->pipe_count; i++) {
struct hubp *hubp = dc->res_pool->hubps[i];
struct dpp *dpp = dc->res_pool->dpps[i];