Re: [PATCH v3 3/5] ASoC: qcom: Add support for lpass hdmi driver

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Thanks Stephen for your time for review!!!

On 9/1/2020 1:06 PM, Stephen Boyd wrote:
Quoting Srinivasa Rao Mandadapu (2020-08-30 23:39:22)
diff --git a/sound/soc/qcom/lpass-hdmi.c b/sound/soc/qcom/lpass-hdmi.c
new file mode 100644
index 0000000..7e18113
--- /dev/null
+++ b/sound/soc/qcom/lpass-hdmi.c
@@ -0,0 +1,684 @@
+// SPDX-License-Identifier: GPL-2.0-only
[...]
+
+static int lpass_hdmi_daiops_hw_params(struct snd_pcm_substream *substream,
+               struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
[...]
+       data_format = LPASS_DATA_FORMAT_LINEAR;
+       ch_sts_buf0 = (((data_format << LPASS_DATA_FORMAT_SHIFT) & LPASS_DATA_FORMAT_MASK)
+                               | ((sampling_freq << LPASS_FREQ_BIT_SHIFT) & LPASS_FREQ_BIT_MASK));
+       ch_sts_buf1 = (word_length) & LPASS_WORDLENGTH_MASK;
+
+       ret = regmap_field_write(drvdata->tx_ctl->soft_reset, LPASS_TX_CTL_RESET);
+       if (ret) {
+               dev_err(dai->dev, "%s error writing to softreset enable : %d\n",
All of these strings bloat the kernel image. Can we just return ret
instead and if something goes wrong we can use a debug patch to figure
out which register write failed? Would a register write even fail to
begin with?
Will remove wherever possible.

+                                       __func__, ret);
+               return ret;
+       }
+
+       ret = regmap_field_write(drvdata->tx_ctl->soft_reset, LPASS_TX_CTL_CLEAR);
+       if (ret) {
+               dev_err(dai->dev, "%s error writing to softreset disable : %d\n",
+                                       __func__, ret);
+               return ret;
+       }
+
+       ret = regmap_field_write(drvdata->legacy->legacy_en,
+                               LPASS_HDMITX_LEGACY_DISABLE);
+       if (ret) {
+               dev_err(dai->dev, "%s error writing to legacy_en field : %d\n",
+                                       __func__, ret);
+               return ret;
+       }
+
[...]
  #define LPAIF_DMACTL_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, CTL)
  #define LPAIF_DMABASE_REG(v, chan, dir) __LPAIF_DMA_REG(v, chan, dir, BASE)
diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index df692ed..607f4c4 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -553,7 +702,21 @@ static irqreturn_t lpass_platform_lpaif_irq(int irq, void *data)
/* Handle per channel interrupts */
         for (chan = 0; chan < LPASS_MAX_DMA_CHANNELS; chan++) {
-               if (irqs & LPAIF_IRQ_ALL(chan) && drvdata->substream[chan]) {
+               switch (v->id) {
+               case HDMI_INTERFACE:
+                       val = LPAIF_IRQ_HDMI_REQ_ON_PRELOAD(chan) |
+                               LPAIF_IRQ_HDMI_METADONE |
+                               LPAIF_IRQ_HDMI_SDEEP_AUD_DIS(chan);
+                       break;
+               case I2S_INTERFACE:
+                       val = 0;
+                       break;
+               default:
+                       pr_err("%s: invalid  %d interface\n", __func__, v->id);
Any reason we can't use dev_err() here?

It's interrupt handler. Here dev variable is not available.

So we shall remove print as per your previous comment or keep as it is.


+                       return -EINVAL;
+               }
+               if (irqs & (LPAIF_IRQ_ALL(chan) | val)
+                       && drvdata->substream[chan]) {
                         rv = lpass_dma_interrupt_handler(
                                                 drvdata->substream[chan],
                                                 drvdata, chan, irqs);
@@ -644,15 +807,15 @@ int asoc_qcom_lpass_platform_register(struct platform_device *pdev)
/* ensure audio hardware is disabled */
         ret = regmap_write(drvdata->lpaif_map,
-                       LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST), 0);
+                       IRQ_EN(v, LPAIF_IRQ_PORT_HOST), 0);
         if (ret) {
                 dev_err(&pdev->dev, "error writing to irqen reg: %d\n", ret);
                 return ret;
         }
ret = devm_request_irq(&pdev->dev, drvdata->lpaif_irq,
-                       lpass_platform_lpaif_irq, IRQF_TRIGGER_RISING,
-                       "lpass-irq-lpaif", drvdata);
+               lpass_platform_lpaif_irq, IRQF_TRIGGER_RISING,
Can we use the irq flags from the firmware, i.e. whatever the DT or ACPI
tables say?
okay.

+               pdev->name, drvdata);
         if (ret) {
                 dev_err(&pdev->dev, "irq request failed: %d\n", ret);
                 return ret;

--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.




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