Patch "drm/amdgpu/cgs: always set reference clock in mode_info" has been added to the 4.12-stable tree

Patch "drm/amdgpu/cgs: always set reference clock in mode_info" has been added to the 4.12-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu/cgs: always set reference clock in mode_info

to the 4.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-cgs-always-set-reference-clock-in-mode_info.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 73cc90798ff765341a1d9c2cfe18153ab231c9bb Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 30 Jun 2017 09:58:34 -0400
Subject: drm/amdgpu/cgs: always set reference clock in mode_info
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Alex Deucher <alexander.deucher@amd.com>

commit 73cc90798ff765341a1d9c2cfe18153ab231c9bb upstream.

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
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>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cgs.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- 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_display
 		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,


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.12/drm-amd-amdgpu-return-error-if-initiating-read-out-of-range-on-vram.patch
queue-4.12/drm-radeon-fix-edp-for-single-display-imac10-1-v2.patch
queue-4.12/drm-amdgpu-gfx8-drop-per-apu-cu-limits.patch
queue-4.12/drm-amdgpu-cgs-always-set-reference-clock-in-mode_info.patch
queue-4.12/drm-amdgpu-don-t-call-amd_powerplay_destroy-if-we-don-t-have-powerplay.patch
queue-4.12/drm-radeon-ci-disable-mclk-switching-for-high-refresh-rates-v2.patch
queue-4.12/drm-amdgpu-fix-the-memory-corruption-on-s3.patch
queue-4.12/drm-amdgpu-fix-vblank_time-when-displays-are-off.patch
queue-4.12/drm-ttm-fix-use-after-free-in-ttm_bo_clean_mm.patch