Re: [PATCH 4/6] media: platform: venus: Add optional LLCC path

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On 04/08/2023 21:09, Konrad Dybcio wrote:
Some newer SoCs (such as SM8350) have a third interconnect path. Add
it and make it optional.

Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
---
  drivers/media/platform/qcom/venus/core.c       | 19 +++++++++++++++++++
  drivers/media/platform/qcom/venus/core.h       |  3 +++
  drivers/media/platform/qcom/venus/pm_helpers.c |  3 +++
  3 files changed, 25 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 0af45faec247..db363061748f 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -302,6 +302,15 @@ static int venus_probe(struct platform_device *pdev)
  	if (IS_ERR(core->cpucfg_path))
  		return PTR_ERR(core->cpucfg_path);
+ core->llcc_path = devm_of_icc_get(dev, "video-llcc");
+	if (IS_ERR(core->llcc_path)) {
+		/* LLCC path is optional */
+		if (PTR_ERR(core->llcc_path) == -ENODATA)
+			core->llcc_path = NULL;
+		else
+			return PTR_ERR(core->llcc_path);
+	}
+
  	core->irq = platform_get_irq(pdev, 0);
  	if (core->irq < 0)
  		return core->irq;
@@ -479,12 +488,18 @@ static __maybe_unused int venus_runtime_suspend(struct device *dev)
  	if (ret)
  		goto err_cpucfg_path;
+ ret = icc_set_bw(core->llcc_path, 0, 0);
+	if (ret)
+		goto err_llcc_path;
+
  	ret = icc_set_bw(core->video_path, 0, 0);
  	if (ret)
  		goto err_video_path;
return ret; +err_llcc_path:
+	icc_set_bw(core->video_path, kbps_to_icc(20000), 0);
  err_video_path:
  	icc_set_bw(core->cpucfg_path, kbps_to_icc(1000), 0);
  err_cpucfg_path:
@@ -504,6 +519,10 @@ static __maybe_unused int venus_runtime_resume(struct device *dev)
  	if (ret)
  		return ret;
+ ret = icc_set_bw(core->llcc_path, kbps_to_icc(20000), 0);
+	if (ret)
+		return ret;
+

I would scream if someone left me this comment but...

In probe we have

video_path =
cpu_cfgpath =

llc_path =

suspend

icc_set_bw(cpu_cfgpath,);
icc_set_bw(llc_path,);
icc_set_bw(video_path,);

resume
icc_set_bw(video_path,);
icc_set_bw(llc_path,);
icc_set_bw(cpu_cfgpath,);

it would be nice to have probe match the ordering ...

  	ret = icc_set_bw(core->cpucfg_path, kbps_to_icc(1000), 0);
  	if (ret)
  		return ret;
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 2999c24392f5..45ed1551c2db 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -65,6 +65,7 @@ struct venus_resources {
  	unsigned int bw_tbl_enc_size;
  	const struct bw_tbl *bw_tbl_dec;
  	unsigned int bw_tbl_dec_size;
+	bool has_llcc_path;

Why do you need this bool, you can get for llc_path == NULL

---
bod



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