Commit 7a572b1e authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/cgs: add refresh rate checking to non-DC display code 



Clamp the vblank period to 0 if the refresh rate is larger than
120 hz for non-DC.  This allows us to remove the refresh rate
checks from powerplay for mclk switching.

Reviewed-by: default avatarEric Huang <JinhuiEric.Huang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent a9b3c001

drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c

+5 −0
Original line number Diff line number Diff line
@@ -953,6 +953,11 @@ static int amdgpu_cgs_get_active_displays_info(struct cgs_device *cgs_device, 
								(amdgpu_crtc->v_border * 2);

					mode_info->vblank_time_us = vblank_lines * line_time_us;

					mode_info->refresh_rate = drm_mode_vrefresh(&amdgpu_crtc->hw_mode);

					/* we have issues with mclk switching with refresh rates

					 * over 120 hz on the non-DC code.

					 */

					if (mode_info->refresh_rate > 120)

						mode_info->vblank_time_us = 0;

					mode_info = NULL;

				}

			}

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