| Message ID | 20210423172745.30092-1-dafna.hirschfeld@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | media: mtk-vpu: on suspend, read/write regs only if vpu is running | expand |
diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c index 043894f7188c..f49f6d53a941 100644 --- a/drivers/media/platform/mtk-vpu/mtk_vpu.c +++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c @@ -987,6 +987,12 @@ 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,
If the vpu is not running, we should not relay 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> --- drivers/media/platform/mtk-vpu/mtk_vpu.c | 6 ++++++ 1 file changed, 6 insertions(+)