ASoC: SOF: remove const qualifier for 'struct snd_sof_dsp_ops'

Now that we start having multiple platforms with minor variants, the
use of the const qualifier for 'dsp_ops' is starting to be
sub-optimal: the structures are copied across platforms, with only a
couple of members that differ.

This patch removes the const qualifier without any functionality
changes, and adds an optional initialization callback. In follow-up
patches, the dsp_ops will revisited for Intel HDaudio platforms, with
the differences added programmatically over a common baseline.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220414184817.362215-9-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof.h

@@ -16,6 +16,7 @@
 #include <sound/soc-acpi.h>
 
 struct snd_sof_dsp_ops;
+struct snd_sof_dev;
 
 /**
  * enum sof_fw_state - DSP firmware state definitions
@@ -135,7 +136,8 @@ struct sof_dev_desc {
 	/* default firmware name */
 	const char *default_fw_filename[SOF_IPC_TYPE_COUNT];
 
-	const struct snd_sof_dsp_ops *ops;
+	struct snd_sof_dsp_ops *ops;
+	int (*ops_init)(struct snd_sof_dev *sdev);
 };
 
 int sof_dai_get_mclk(struct snd_soc_pcm_runtime *rtd);

sound/soc/sof/amd/acp.h

@@ -204,7 +204,7 @@ int acp_pcm_hw_params(struct snd_sof_dev *sdev, struct snd_pcm_substream *substr
 		      struct snd_pcm_hw_params *params,
 		      struct snd_sof_platform_stream_params *platform_params);
 
-extern const struct snd_sof_dsp_ops sof_renoir_ops;
+extern struct snd_sof_dsp_ops sof_renoir_ops;
 
 /* Machine configuration */
 int snd_amd_acp_find_config(struct pci_dev *pci);

sound/soc/sof/amd/renoir.c

@@ -123,7 +123,7 @@ static struct snd_soc_acpi_mach *amd_sof_machine_select(struct snd_sof_dev *sdev
 }
 
 /* AMD Renoir DSP ops */
-const struct snd_sof_dsp_ops sof_renoir_ops = {
+struct snd_sof_dsp_ops sof_renoir_ops = {
 	/* probe and remove */
 	.probe			= amd_sof_acp_probe,
 	.remove			= amd_sof_acp_remove,

sound/soc/sof/core.c

@@ -357,6 +357,9 @@ int snd_sof_device_probe(struct device *dev, struct snd_sof_pdata *plat_data)
 	sdev->first_boot = true;
 	dev_set_drvdata(dev, sdev);
 
+	/* init ops, if necessary */
+	sof_ops_init(sdev);
+
 	/* check all mandatory ops */
 	if (!sof_ops(sdev) || !sof_ops(sdev)->probe || !sof_ops(sdev)->run ||
 	    !sof_ops(sdev)->block_read || !sof_ops(sdev)->block_write ||

sound/soc/sof/debug.c

@@ -331,7 +331,7 @@ EXPORT_SYMBOL_GPL(snd_sof_dbg_memory_info_init);
 
 int snd_sof_dbg_init(struct snd_sof_dev *sdev)
 {
-	const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
+	struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 	const struct snd_sof_debugfs_map *map;
 	int i;
 	int err;

sound/soc/sof/imx/imx8.c

@@ -487,7 +487,7 @@ static int imx8_dsp_set_power_state(struct snd_sof_dev *sdev,
 }
 
 /* i.MX8 ops */
-static const struct snd_sof_dsp_ops sof_imx8_ops = {
+static struct snd_sof_dsp_ops sof_imx8_ops = {
 	/* probe and remove */
 	.probe		= imx8_probe,
 	.remove		= imx8_remove,
@@ -550,7 +550,7 @@ static const struct snd_sof_dsp_ops sof_imx8_ops = {
 };
 
 /* i.MX8X ops */
-static const struct snd_sof_dsp_ops sof_imx8x_ops = {
+static struct snd_sof_dsp_ops sof_imx8x_ops = {
 	/* probe and remove */
 	.probe		= imx8_probe,
 	.remove		= imx8_remove,

sound/soc/sof/imx/imx8m.c

@@ -412,7 +412,7 @@ static int imx8m_dsp_suspend(struct snd_sof_dev *sdev, unsigned int target_state
 }
 
 /* i.MX8 ops */
-static const struct snd_sof_dsp_ops sof_imx8m_ops = {
+static struct snd_sof_dsp_ops sof_imx8m_ops = {
 	/* probe and remove */
 	.probe		= imx8m_probe,
 	.remove		= imx8m_remove,

sound/soc/sof/intel/apl.c

@@ -26,7 +26,7 @@ static const struct snd_sof_debugfs_map apl_dsp_debugfs[] = {
 };
 
 /* apollolake ops */
-const struct snd_sof_dsp_ops sof_apl_ops = {
+struct snd_sof_dsp_ops sof_apl_ops = {
 	/* probe/remove/shutdown */
 	.probe		= hda_dsp_probe,
 	.remove		= hda_dsp_remove,

sound/soc/sof/intel/bdw.c

@@ -567,7 +567,7 @@ static struct snd_soc_dai_driver bdw_dai[] = {
 };
 
 /* broadwell ops */
-static const struct snd_sof_dsp_ops sof_bdw_ops = {
+static struct snd_sof_dsp_ops sof_bdw_ops = {
 	/*Device init */
 	.probe          = bdw_probe,
 

sound/soc/sof/intel/byt.c

@@ -216,7 +216,7 @@ irq:
 }
 
 /* baytrail ops */
-static const struct snd_sof_dsp_ops sof_byt_ops = {
+static struct snd_sof_dsp_ops sof_byt_ops = {
 	/* device init */
 	.probe		= byt_acpi_probe,
 	.remove		= byt_remove,
@@ -298,7 +298,7 @@ static const struct sof_intel_dsp_desc byt_chip_info = {
 };
 
 /* cherrytrail and braswell ops */
-static const struct snd_sof_dsp_ops sof_cht_ops = {
+static struct snd_sof_dsp_ops sof_cht_ops = {
 	/* device init */
 	.probe		= byt_acpi_probe,
 	.remove		= byt_remove,

sound/soc/sof/intel/cnl.c

@@ -244,7 +244,7 @@ void cnl_ipc_dump(struct snd_sof_dev *sdev)
 }
 
 /* cannonlake ops */
-const struct snd_sof_dsp_ops sof_cnl_ops = {
+struct snd_sof_dsp_ops sof_cnl_ops = {
 	/* probe/remove/shutdown */
 	.probe		= hda_dsp_probe,
 	.remove		= hda_dsp_remove,

sound/soc/sof/intel/hda.h

@@ -687,10 +687,10 @@ extern struct snd_soc_dai_driver skl_dai[];
 /*
  * Platform Specific HW abstraction Ops.
  */
-extern const struct snd_sof_dsp_ops sof_apl_ops;
-extern const struct snd_sof_dsp_ops sof_cnl_ops;
-extern const struct snd_sof_dsp_ops sof_tgl_ops;
-extern const struct snd_sof_dsp_ops sof_icl_ops;
+extern struct snd_sof_dsp_ops sof_apl_ops;
+extern struct snd_sof_dsp_ops sof_cnl_ops;
+extern struct snd_sof_dsp_ops sof_tgl_ops;
+extern struct snd_sof_dsp_ops sof_icl_ops;
 
 extern const struct sof_intel_dsp_desc apl_chip_info;
 extern const struct sof_intel_dsp_desc cnl_chip_info;

sound/soc/sof/intel/icl.c

@@ -88,7 +88,7 @@ static int icl_dsp_post_fw_run(struct snd_sof_dev *sdev)
 }
 
 /* Icelake ops */
-const struct snd_sof_dsp_ops sof_icl_ops = {
+struct snd_sof_dsp_ops sof_icl_ops = {
 	/* probe/remove/shutdown */
 	.probe		= hda_dsp_probe,
 	.remove		= hda_dsp_remove,

sound/soc/sof/intel/pci-tng.c

@@ -136,7 +136,7 @@ irq:
 	return ret;
 }
 
-const struct snd_sof_dsp_ops sof_tng_ops = {
+struct snd_sof_dsp_ops sof_tng_ops = {
 	/* device init */
 	.probe		= tangier_pci_probe,
 

sound/soc/sof/intel/shim.h

@@ -173,7 +173,7 @@ struct sof_intel_dsp_desc {
 	bool (*check_sdw_irq)(struct snd_sof_dev *sdev);
 };
 
-extern const struct snd_sof_dsp_ops sof_tng_ops;
+extern struct snd_sof_dsp_ops sof_tng_ops;
 
 extern const struct sof_intel_dsp_desc tng_chip_info;
 

sound/soc/sof/intel/tgl.c

@@ -59,7 +59,7 @@ static int tgl_dsp_core_put(struct snd_sof_dev *sdev, int core)
 }
 
 /* Tigerlake ops */
-const struct snd_sof_dsp_ops sof_tgl_ops = {
+struct snd_sof_dsp_ops sof_tgl_ops = {
 	/* probe/remove/shutdown */
 	.probe		= hda_dsp_probe,
 	.remove		= hda_dsp_remove,

sound/soc/sof/mediatek/mt8195/mt8195.c

@@ -393,7 +393,7 @@ static struct snd_soc_dai_driver mt8195_dai[] = {
 };
 
 /* mt8195 ops */
-static const struct snd_sof_dsp_ops sof_mt8195_ops = {
+static struct snd_sof_dsp_ops sof_mt8195_ops = {
 	/* probe and remove */
 	.probe		= mt8195_dsp_probe,
 	.remove		= mt8195_dsp_remove,

sound/soc/sof/ops.h

@@ -21,6 +21,12 @@
 #define sof_ops(sdev) \
 	((sdev)->pdata->desc->ops)
 
+static inline void sof_ops_init(struct snd_sof_dev *sdev)
+{
+	if (sdev->pdata->desc->ops_init)
+		sdev->pdata->desc->ops_init(sdev);
+}
+
 /* Mandatory operations are verified during probing */
 
 /* init */

sound/soc/sof/pcm.c

@@ -393,7 +393,7 @@ static int sof_pcm_open(struct snd_soc_component *component,
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(component);
-	const struct snd_sof_dsp_ops *ops = sof_ops(sdev);
+	struct snd_sof_dsp_ops *ops = sof_ops(sdev);
 	struct snd_sof_pcm *spcm;
 	struct snd_soc_tplg_stream_caps *caps;
 	int ret;