apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

drm/msm: Turn off hardware clock gating before reading A5XX registers

Browse Source 
On A5XX GPU hardware clock gating needs to be turned off before
reading certain GPU registers via AHB. Turn off HWCG before calling
adreno_show() to safely dump all the registers without a system hang.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Jordan Crouse
2017-07-27 10:42:32 -06:00
committed by Rob Clark
parent 6e749e5971
commit a23cb3b52f
1 changed files with 7 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+7
View File
@@ -995,7 +995,14 @@ static void a5xx_show(struct msm_gpu *gpu, struct seq_file *m)
{
seq_printf(m, "status: %08x\n",
gpu_read(gpu, REG_A5XX_RBBM_STATUS));
/*
* Temporarily disable hardware clock gating before going into
* adreno_show to avoid issues while reading the registers
*/
a5xx_set_hwcg(gpu, false);
adreno_show(gpu, m);
a5xx_set_hwcg(gpu, true);
}
#endif