media: venus: put dummy vote on video-mem path after last session release

As per current implementation, video driver is unvoting "videom-mem" path
for last video session during vdec_session_release().
While video playback when we try to suspend device, we see video clock
warnings since votes are already removed during vdec_session_release().

corrected this by putting dummy vote on "video-mem" after last video
session release and unvoting it during suspend.

suspend")

Fixes: 07f8f22a33a9e ("media: venus: core: remove CNOC voting while device
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index 57877eacecf08758af00459e6abc3e687bcebcd2..0ebba8e3bd75cd655fac912c8b5ec74d4372816a 100644 (file)
--- a/drivers/media/platform/qcom/venus/pm_helpers.c
+++ b/drivers/media/platform/qcom/venus/pm_helpers.c
@@ -212,6 +212,16 @@ static int load_scale_bw(struct venus_core *core)
        }
        mutex_unlock(&core->lock);
 
+       /*
+        * keep minimum bandwidth vote for "video-mem" path,
+        * so that clks can be disabled during vdec_session_release().
+        * Actual bandwidth drop will be done during device supend
+        * so that device can power down without any warnings.
+        */
+
+       if (!total_avg && !total_peak)
+               total_avg = kbps_to_icc(1000);
+
        dev_dbg(core->dev, VDBGL "total: avg_bw: %u, peak_bw: %u\n",
                total_avg, total_peak);