drm/amd/display: Add power down display on boot flag (27eaa492) · Commits · 戴 / test

[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>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);

drivers/gpu/drm/amd/display/dc/dc.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -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 {

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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];

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