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drm/amdgpu: adjust default display clock

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commit 52b482b0f4fd6d5267faf29fe91398e203f3c230 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Deucher 2017-06-15 11:12:28 -04:00 committed by Greg Kroah-Hartman
parent 217e035d51
commit 581659a878
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
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@ -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);