Re: [PATCH 4/7] ASoC: codecs: lpass-va-macro: Change bulk voting to individual clock voting

From: Srinivas Kandagatla
Date: Tue Sep 21 2021 - 04:50:16 EST




On 21/09/2021 09:14, Srinivasa Rao Mandadapu wrote:

On 9/20/2021 6:55 PM, Srinivas Kandagatla wrote:


Thanks for Your time Srini!!!
On 20/09/2021 08:35, Srinivasa Rao Mandadapu wrote:
Change bulk clock frequency voting to individual voting.

Can you please explain why do we need to move out using clk bulk apis?

Am not seeing any thing obvious behavior changing as part of this patch, more details please..

In ADSP bypass use case, few clocks like macro and decode, are optional. So is the main reason for move out.


Have you tried using clk_bulk_get_optional()

--srini

And sometimes we are seeing bulk voting failed in Kodiak setup.

Fixes: 908e6b1df26e (ASoC: codecs: lpass-va-macro: Add support to VA Macro)

Why this has Fixes tag? Are we fixing any bug with this patch?
Okay. As such we are not fixing any bug. Will remove this fixes tag on your suggestion.


Signed-off-by: Venkata Prasad Potturu <potturu@xxxxxxxxxxxxxx>
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@xxxxxxxxxxxxxx>
---
  sound/soc/codecs/lpass-va-macro.c | 46 ++++++++++++++++++++++++---------------
  1 file changed, 28 insertions(+), 18 deletions(-)

diff --git a/sound/soc/codecs/lpass-va-macro.c b/sound/soc/codecs/lpass-va-macro.c
index d312a14..0ea39ae 100644
--- a/sound/soc/codecs/lpass-va-macro.c
+++ b/sound/soc/codecs/lpass-va-macro.c
@@ -193,7 +193,10 @@ struct va_macro {
        int dec_mode[VA_MACRO_NUM_DECIMATORS];
      struct regmap *regmap;
-    struct clk_bulk_data clks[VA_NUM_CLKS_MAX];
+    struct clk *mclk;
+    struct clk *macro;
+    struct clk *dcodec;
+
      struct clk_hw hw;
        s32 dmic_0_1_clk_cnt;
@@ -1321,7 +1324,7 @@ static const struct clk_ops fsgen_gate_ops = {
    static int va_macro_register_fsgen_output(struct va_macro *va)
  {
-    struct clk *parent = va->clks[2].clk;
+    struct clk *parent = va->mclk;
      struct device *dev = va->dev;
      struct device_node *np = dev->of_node;
      const char *parent_clk_name;
@@ -1404,15 +1407,18 @@ static int va_macro_probe(struct platform_device *pdev)
          return -ENOMEM;
        va->dev = dev;
-    va->clks[0].id = "macro";
-    va->clks[1].id = "dcodec";
-    va->clks[2].id = "mclk";
  -    ret = devm_clk_bulk_get(dev, VA_NUM_CLKS_MAX, va->clks);
-    if (ret) {
-        dev_err(dev, "Error getting VA Clocks (%d)\n", ret);
-        return ret;
-    }
+    va->macro = devm_clk_get_optional(dev, "macro");
+    if (IS_ERR(va->macro))
+        return PTR_ERR(va->macro);
+
+    va->dcodec = devm_clk_get_optional(dev, "dcodec");
+    if (IS_ERR(va->dcodec))
+        return PTR_ERR(va->dcodec);
+
+    va->mclk = devm_clk_get(dev, "mclk");
+    if (IS_ERR(va->mclk))
+        return PTR_ERR(va->mclk);
        ret = of_property_read_u32(dev->of_node, "qcom,dmic-sample-rate",
                     &sample_rate);
@@ -1426,10 +1432,11 @@ static int va_macro_probe(struct platform_device *pdev)
      }
        /* mclk rate */
-    clk_set_rate(va->clks[1].clk, VA_MACRO_MCLK_FREQ);
-    ret = clk_bulk_prepare_enable(VA_NUM_CLKS_MAX, va->clks);
-    if (ret)
-        return ret;
+    clk_set_rate(va->mclk, VA_MACRO_MCLK_FREQ);
+
+    clk_prepare_enable(va->mclk);
+    clk_prepare_enable(va->macro);
+    clk_prepare_enable(va->dcodec);
        base = devm_platform_ioremap_resource(pdev, 0);
      if (IS_ERR(base)) {
@@ -1457,8 +1464,9 @@ static int va_macro_probe(struct platform_device *pdev)
      return ret;
    err:
-    clk_bulk_disable_unprepare(VA_NUM_CLKS_MAX, va->clks);
-
+    clk_disable_unprepare(va->mclk);
+    clk_disable_unprepare(va->macro);
+    clk_disable_unprepare(va->dcodec);
      return ret;
  }
  @@ -1466,8 +1474,10 @@ static int va_macro_remove(struct platform_device *pdev)
  {
      struct va_macro *va = dev_get_drvdata(&pdev->dev);
  -    clk_bulk_disable_unprepare(VA_NUM_CLKS_MAX, va->clks);
-
+    of_clk_del_provider(pdev->dev.of_node);

fsgen clk is registered using devm_* variant of clk apis, so why do we need this here?

Okay. Will remove it and post new patch.

--srini
+    clk_disable_unprepare(va->mclk);
+    clk_disable_unprepare(va->macro);
+    clk_disable_unprepare(va->dcodec);
      return 0;
  }