diff options
| author | Dafna Hirschfeld <dafna.hirschfeld@collabora.com> | 2021-04-23 19:27:45 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-06-28 15:17:42 +0200 |
| commit | 11420749c6b4b237361750de3d5b5579175f8622 (patch) | |
| tree | 2f414a6dc59cfa4e0223c91b41f92410e5a8abf3 /drivers | |
| parent | 95778c2d0979618e3349b1d2324ec282a5a6adbf (diff) | |
media: mtk-vpu: on suspend, read/write regs only if vpu is running
If the vpu is not running, we should not rely on VPU_IDLE_REG
value. In this case, the suspend cb should only unprepare the
clock. This fixes a system-wide suspend to ram failure:
[ 273.073363] PM: suspend entry (deep)
[ 273.410502] mtk-msdc 11230000.mmc: phase: [map:ffffffff] [maxlen:32] [final:10]
[ 273.455926] Filesystems sync: 0.378 seconds
[ 273.589707] Freezing user space processes ... (elapsed 0.003 seconds) done.
[ 273.600104] OOM killer disabled.
[ 273.603409] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
[ 273.613361] mwifiex_sdio mmc2:0001:1: None of the WOWLAN triggers enabled
[ 274.784952] mtk_vpu 10020000.vpu: vpu idle timeout
[ 274.789764] PM: dpm_run_callback(): platform_pm_suspend+0x0/0x70 returns -5
[ 274.796740] mtk_vpu 10020000.vpu: PM: failed to suspend: error -5
[ 274.802842] PM: Some devices failed to suspend, or early wake event detected
[ 275.426489] OOM killer enabled.
[ 275.429718] Restarting tasks ...
[ 275.435765] done.
[ 275.447510] PM: suspend exit
Fixes: 1f565e263c3e ("media: mtk-vpu: VPU should be in idle state before system is suspended")
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/platform/mtk-vpu/mtk_vpu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index ef458b417fa7..ec290dde59cf 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -985,6 +985,12 @@ static int mtk_vpu_suspend(struct device *dev) return ret; } + if (!vpu_running(vpu)) { + vpu_clock_disable(vpu); + clk_unprepare(vpu->clk); + return 0; + } + mutex_lock(&vpu->vpu_mutex); /* disable vpu timer interrupt */ vpu_cfg_writel(vpu, vpu_cfg_readl(vpu, VPU_INT_STATUS) | VPU_IDLE_STATE, |