[PATCH v4 0/4] Venus - change clk enable, disable order and change bw values

[PATCH v4 0/4] Venus - change clk enable, disable order and change bw values

[Mansur Alisha Shaik]

The intention of this patchset is to correct clock enable and disable
order and vote for venus-ebi and cpucfg paths with average bandwidth
instad of peak bandwidth since with current implementation we are seeing
clock related warning during XO-SD and suspend device while video playback

---
Resending v4 series by correcting fixes tag for all patches in series`

Mansur Alisha Shaik (4):
  venus: core: change clk enable and disable order in resume and suspend
  venus: core: vote for video-mem path
  venus: core: vote with average bandwidth and peak bandwidth as zero
  venus: put dummy vote on video-mem path after last session release

 drivers/media/platform/qcom/venus/core.c       | 32 ++++++++++++++++++++------
 drivers/media/platform/qcom/venus/pm_helpers.c | 10 ++++++++
 2 files changed, 35 insertions(+), 7 deletions(-)

-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v4 1/4] venus: core: change clk enable and disable order in resume and suspend

[Mansur Alisha Shaik]

Currently video driver is voting after clk enable and un voting
before clk disable. This is incorrect, video driver should vote
before clk enable and unvote after clk disable.

Corrected this by changing the order of clk enable and clk disable.

Fixes: 07f8f22a33a9e ("media: venus: core: remove CNOC voting while device
suspend")
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/media/platform/qcom/venus/core.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 6103aaf..52a3886 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -355,13 +355,16 @@ static __maybe_unused int venus_runtime_suspend(struct device *dev)
 	if (ret)
 		return ret;
 
+	if (pm_ops->core_power) {
+		ret = pm_ops->core_power(dev, POWER_OFF);
+		if (ret)
+			return ret;
+	}
+
 	ret = icc_set_bw(core->cpucfg_path, 0, 0);
 	if (ret)
 		return ret;
 
-	if (pm_ops->core_power)
-		ret = pm_ops->core_power(dev, POWER_OFF);
-
 	return ret;
 }
 
@@ -371,16 +374,16 @@ static __maybe_unused int venus_runtime_resume(struct device *dev)
 	const struct venus_pm_ops *pm_ops = core->pm_ops;
 	int ret;
 
+	ret = icc_set_bw(core->cpucfg_path, 0, kbps_to_icc(1000));
+	if (ret)
+		return ret;
+
 	if (pm_ops->core_power) {
 		ret = pm_ops->core_power(dev, POWER_ON);
 		if (ret)
 			return ret;
 	}
 
-	ret = icc_set_bw(core->cpucfg_path, 0, kbps_to_icc(1000));
-	if (ret)
-		return ret;
-
 	return hfi_core_resume(core, false);
 }
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v4 2/4] venus: core: vote for video-mem path

[Mansur Alisha Shaik]

Currently video driver is voting for venus0-ebi path during buffer
processing with an average bandwidth of all the instances and
unvoting during session release.

While video streaming when we try to do XO-SD using the command
"echo mem > /sys/power/state command" , device is not entering
to suspend state and from interconnect summary seeing votes for venus0-ebi

Corrected this by voting for venus0-ebi path in venus_runtime_resume()
and unvote during venus_runtime_suspend().

Fixes: 07f8f22a33a9e ("media: venus: core: remove CNOC voting while device
suspend")
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
Changes in v4:
- As per Stanimir's comments, corrected fixes tag

 drivers/media/platform/qcom/venus/core.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 52a3886..fa363b8 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -363,7 +363,18 @@ static __maybe_unused int venus_runtime_suspend(struct device *dev)
 
 	ret = icc_set_bw(core->cpucfg_path, 0, 0);
 	if (ret)
-		return ret;
+		goto err_cpucfg_path;
+
+	ret = icc_set_bw(core->video_path, 0, 0);
+	if (ret)
+		goto err_video_path;
+
+	return ret;
+
+err_video_path:
+	icc_set_bw(core->cpucfg_path, kbps_to_icc(1000), 0);
+err_cpucfg_path:
+	pm_ops->core_power(dev, POWER_ON);
 
 	return ret;
 }
@@ -374,6 +385,10 @@ static __maybe_unused int venus_runtime_resume(struct device *dev)
 	const struct venus_pm_ops *pm_ops = core->pm_ops;
 	int ret;
 
+	ret = icc_set_bw(core->video_path, 0, kbps_to_icc(1000));
+	if (ret)
+		return ret;
+
 	ret = icc_set_bw(core->cpucfg_path, 0, kbps_to_icc(1000));
 	if (ret)
 		return ret;
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v4 3/4] venus: core: vote with average bandwidth and peak bandwidth as zero

[Mansur Alisha Shaik]

As per bandwidth table video driver is voting with average bandwidth
for "video-mem" and "cpu-cfg" paths as peak bandwidth is zero
in bandwidth table.

Fixes: 07f8f22a33a9e ("media: venus: core: remove CNOC voting while device
suspend")
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
Changes in v4:
- As per Stanimir's comments, corrected fixes tag

 drivers/media/platform/qcom/venus/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index fa363b8..d5bfd6f 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -385,11 +385,11 @@ static __maybe_unused int venus_runtime_resume(struct device *dev)
 	const struct venus_pm_ops *pm_ops = core->pm_ops;
 	int ret;
 
-	ret = icc_set_bw(core->video_path, 0, kbps_to_icc(1000));
+	ret = icc_set_bw(core->video_path, kbps_to_icc(20000), 0);
 	if (ret)
 		return ret;
 
-	ret = icc_set_bw(core->cpucfg_path, 0, kbps_to_icc(1000));
+	ret = icc_set_bw(core->cpucfg_path, kbps_to_icc(1000), 0);
 	if (ret)
 		return ret;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

[PATCH v4 4/4] venus: put dummy vote on video-mem path after last session release

[Mansur Alisha Shaik]

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.

Fixes: 07f8f22a33a9e ("media: venus: core: remove CNOC voting while device
suspend")
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
---
Changes in v4:
- As per Stanimir's comments, corrected fixes tag

 drivers/media/platform/qcom/venus/pm_helpers.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index 57877ea..0ebba8e 100644
--- 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);
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH v4 0/4] Venus - change clk enable, disable order and change bw values

[patchwork-bot+linux-arm-msm]

Hello:

This series was applied to qcom/linux.git (refs/heads/for-next):

On Mon, 19 Oct 2020 09:48:10 +0530 you wrote:
> The intention of this patchset is to correct clock enable and disable
> order and vote for venus-ebi and cpucfg paths with average bandwidth
> instad of peak bandwidth since with current implementation we are seeing
> clock related warning during XO-SD and suspend device while video playback
> 
> ---
> Resending v4 series by correcting fixes tag for all patches in series`
> 
> [...]

Here is the summary with links:
  - [v4,1/4] venus: core: change clk enable and disable order in resume and suspend
    https://git.kernel.org/qcom/c/21926d466e3a
  - [v4,2/4] venus: core: vote for video-mem path
    https://git.kernel.org/qcom/c/9e8efdb57879
  - [v4,3/4] venus: core: vote with average bandwidth and peak bandwidth as zero
    https://git.kernel.org/qcom/c/e44fb034b032
  - [v4,4/4] venus: put dummy vote on video-mem path after last session release
    https://git.kernel.org/qcom/c/eff5ce02e170

You are awesome, thank you!
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