From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 15 Jun 2017 15:12:28 +0000 (-0400)
Subject: drm/amdgpu: adjust default display clock
X-Git-Tag: release-20171130_firefly~4^2~100^2~1^2~1^2~11
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=525e496a9722a6189f7ece9236a76f00cb8abef0;p=firefly-linux-kernel-4.4.55.git

drm/amdgpu: adjust default display clock

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>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
index 51a9942cdb40..f4cae5357e40 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
@@ -681,6 +681,10 @@ 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);