drm/amdgpu: adjust default display clock

Increase the default display clock on newer asics to
accomodate some high res modes with really high refresh
rates.

bug: https://bugs.freedesktop.org/show_bug.cgi?id=93826
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 1cf78f4dd339f93ddd971088ec42a5146b9820fe..1e8e1123ddf416f18176cbc6e82fa791b3df9fb5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -693,6 +693,10 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev)
                        DRM_INFO("Changing default dispclk from %dMhz to 600Mhz\n",
                                 adev->clock.default_dispclk / 100);
                        adev->clock.default_dispclk = 60000;
+               } else if (adev->clock.default_dispclk <= 60000) {
+                       DRM_INFO("Changing default dispclk from %dMhz to 625Mhz\n",
+                                adev->clock.default_dispclk / 100);
+                       adev->clock.default_dispclk = 62500;
                }
                adev->clock.dp_extclk =
                        le16_to_cpu(firmware_info->info_21.usUniphyDPModeExtClkFreq);