Attachment 132374 Details for Bug 101653 – possible fix

[patch] possible fix

0001-drm-amdgpu-cgs-always-set-reference-clock-in-mode_in.patch (text/plain), 1.35 KB, created by Alex Deucher on 2017-06-30 14:02:56 UTC

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Creator: Alex Deucher

Created: 2017-06-30 14:02:56 UTC

Size: 1.35 KB

patch

obsolete

>From 288214575722c69339b4fd1268907323d7a5c07e Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Fri, 30 Jun 2017 09:58:34 -0400
>Subject: [PATCH] drm/amdgpu/cgs: always set reference clock in mode_info
>
>It's relevent regardless of whether there are displays
>enabled.  Fixes garbage values for ref clock in powerplay
>leading to incorrect fan speed reporting when displays
>are disabled.
>
>bug: https://bugs.freedesktop.org/show_bug.cgi?id=101653
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
>index 8b8eda7..c0a8062 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c
>@@ -838,9 +838,12 @@ static int amdgpu_cgs_get_active_displays_info(struct cgs_device *cgs_device,
> 		return -EINVAL;
> 
> 	mode_info = info->mode_info;
>-	if (mode_info)
>+	if (mode_info) {
> 		/* if the displays are off, vblank time is max */
> 		mode_info->vblank_time_us = 0xffffffff;
>+		/* always set the reference clock */
>+		mode_info->ref_clock = adev->clock.spll.reference_freq;
>+	}
> 
> 	if (adev->mode_info.num_crtc && adev->mode_info.mode_config_initialized) {
> 		list_for_each_entry(crtc,
>-- 
>2.5.5
>

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