Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 307 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs40l50-codec.c b/sound/soc/codecs/cs40l50-codec.c
new file mode 100644
index 000000000..676367163
--- /dev/null
+++ b/sound/soc/codecs/cs40l50-codec.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// CS40L50 Advanced Haptic Driver with waveform memory,
+// integrated DSP, and closed-loop algorithms
+//
+// Copyright 2024 Cirrus Logic, Inc.
+//
+// Author: James Ogletree <james.ogletree@cirrus.com>
+
+#include <linux/bitfield.h>
+#include <linux/mfd/cs40l50.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define CS40L50_REFCLK_INPUT		0x2C04
+#define CS40L50_ASP_CONTROL2		0x4808
+#define CS40L50_ASP_DATA_CONTROL5	0x4840
+
+/* PLL Config */
+#define CS40L50_PLL_REFCLK_BCLK		0x0
+#define CS40L50_PLL_REFCLK_MCLK		0x5
+#define CS40L50_PLL_REEFCLK_MCLK_CFG	0x00
+#define CS40L50_PLL_REFCLK_LOOP_MASK	BIT(11)
+#define CS40L50_PLL_REFCLK_OPEN_LOOP	1
+#define CS40L50_PLL_REFCLK_CLOSED_LOOP	0
+#define CS40L50_PLL_REFCLK_LOOP_SHIFT	11
+#define CS40L50_PLL_REFCLK_FREQ_MASK	GENMASK(10, 5)
+#define CS40L50_PLL_REFCLK_FREQ_SHIFT	5
+#define CS40L50_PLL_REFCLK_SEL_MASK	GENMASK(2, 0)
+#define CS40L50_BCLK_RATIO_DEFAULT	32
+
+/* ASP Config */
+#define CS40L50_ASP_RX_WIDTH_SHIFT	24
+#define CS40L50_ASP_RX_WIDTH_MASK	GENMASK(31, 24)
+#define CS40L50_ASP_RX_WL_MASK		GENMASK(5, 0)
+#define CS40L50_ASP_FSYNC_INV_MASK	BIT(2)
+#define CS40L50_ASP_BCLK_INV_MASK	BIT(6)
+#define CS40L50_ASP_FMT_MASK		GENMASK(10, 8)
+#define CS40L50_ASP_FMT_I2S		0x2
+
+struct cs40l50_pll_config {
+	unsigned int freq;
+	unsigned int cfg;
+};
+
+struct cs40l50_codec {
+	struct device *dev;
+	struct regmap *regmap;
+	unsigned int daifmt;
+	unsigned int bclk_ratio;
+	unsigned int rate;
+};
+
+static const struct cs40l50_pll_config cs40l50_pll_cfg[] = {
+	{ 32768, 0x00 },
+	{ 1536000, 0x1B },
+	{ 3072000, 0x21 },
+	{ 6144000, 0x28 },
+	{ 9600000, 0x30 },
+	{ 12288000, 0x33 },
+};
+
+static int cs40l50_get_clk_config(const unsigned int freq, unsigned int *cfg)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cs40l50_pll_cfg); i++) {
+		if (cs40l50_pll_cfg[i].freq == freq) {
+			*cfg = cs40l50_pll_cfg[i].cfg;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int cs40l50_swap_ext_clk(struct cs40l50_codec *codec, const unsigned int clk_src)
+{
+	unsigned int cfg;
+	int ret;
+
+	switch (clk_src) {
+	case CS40L50_PLL_REFCLK_BCLK:
+		ret = cs40l50_get_clk_config(codec->bclk_ratio * codec->rate, &cfg);
+		if (ret)
+			return ret;
+		break;
+	case CS40L50_PLL_REFCLK_MCLK:
+		cfg = CS40L50_PLL_REEFCLK_MCLK_CFG;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+				 CS40L50_PLL_REFCLK_LOOP_MASK,
+				 CS40L50_PLL_REFCLK_OPEN_LOOP <<
+				 CS40L50_PLL_REFCLK_LOOP_SHIFT);
+	if (ret)
+		return ret;
+
+	ret = regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+				 CS40L50_PLL_REFCLK_FREQ_MASK |
+				 CS40L50_PLL_REFCLK_SEL_MASK,
+				 (cfg << CS40L50_PLL_REFCLK_FREQ_SHIFT) | clk_src);
+	if (ret)
+		return ret;
+
+	return regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+				  CS40L50_PLL_REFCLK_LOOP_MASK,
+				  CS40L50_PLL_REFCLK_CLOSED_LOOP <<
+				  CS40L50_PLL_REFCLK_LOOP_SHIFT);
+}
+
+static int cs40l50_clk_en(struct snd_soc_dapm_widget *w,
+			  struct snd_kcontrol *kcontrol,
+			  int event)
+{
+	struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+	struct cs40l50_codec *codec = snd_soc_component_get_drvdata(comp);
+	int ret;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		ret = cs40l50_dsp_write(codec->dev, codec->regmap, CS40L50_STOP_PLAYBACK);
+		if (ret)
+			return ret;
+
+		ret = cs40l50_dsp_write(codec->dev, codec->regmap, CS40L50_START_I2S);
+		if (ret)
+			return ret;
+
+		ret = cs40l50_swap_ext_clk(codec, CS40L50_PLL_REFCLK_BCLK);
+		if (ret)
+			return ret;
+		break;
+	case SND_SOC_DAPM_PRE_PMD:
+		ret = cs40l50_swap_ext_clk(codec, CS40L50_PLL_REFCLK_MCLK);
+		if (ret)
+			return ret;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget cs40l50_dapm_widgets[] = {
+	SND_SOC_DAPM_SUPPLY_S("ASP PLL", 0, SND_SOC_NOPM, 0, 0, cs40l50_clk_en,
+			      SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+	SND_SOC_DAPM_AIF_IN("ASPRX1", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("ASPRX2", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_OUTPUT("OUT"),
+};
+
+static const struct snd_soc_dapm_route cs40l50_dapm_routes[] = {
+	{ "ASP Playback", NULL, "ASP PLL" },
+	{ "ASPRX1", NULL, "ASP Playback" },
+	{ "ASPRX2", NULL, "ASP Playback" },
+
+	{ "OUT", NULL, "ASPRX1" },
+	{ "OUT", NULL, "ASPRX2" },
+};
+
+static int cs40l50_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+	struct cs40l50_codec *codec = snd_soc_component_get_drvdata(codec_dai->component);
+
+	if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBC_CFC)
+		return -EINVAL;
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		codec->daifmt = 0;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		codec->daifmt = CS40L50_ASP_FSYNC_INV_MASK;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		codec->daifmt = CS40L50_ASP_BCLK_INV_MASK;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		codec->daifmt = CS40L50_ASP_FSYNC_INV_MASK | CS40L50_ASP_BCLK_INV_MASK;
+		break;
+	default:
+		dev_err(codec->dev, "Invalid clock invert\n");
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		codec->daifmt |= FIELD_PREP(CS40L50_ASP_FMT_MASK, CS40L50_ASP_FMT_I2S);
+		break;
+	default:
+		dev_err(codec->dev, "Unsupported DAI format\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cs40l50_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *params,
+			     struct snd_soc_dai *dai)
+{
+	struct cs40l50_codec *codec = snd_soc_component_get_drvdata(dai->component);
+	unsigned int asp_rx_wl = params_width(params);
+	int ret;
+
+	codec->rate = params_rate(params);
+
+	ret = regmap_update_bits(codec->regmap, CS40L50_ASP_DATA_CONTROL5,
+				 CS40L50_ASP_RX_WL_MASK, asp_rx_wl);
+	if (ret)
+		return ret;
+
+	codec->daifmt |= (asp_rx_wl << CS40L50_ASP_RX_WIDTH_SHIFT);
+
+	return regmap_update_bits(codec->regmap, CS40L50_ASP_CONTROL2,
+				  CS40L50_ASP_FSYNC_INV_MASK |
+				  CS40L50_ASP_BCLK_INV_MASK |
+				  CS40L50_ASP_FMT_MASK |
+				  CS40L50_ASP_RX_WIDTH_MASK, codec->daifmt);
+}
+
+static int cs40l50_set_dai_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
+{
+	struct cs40l50_codec *codec = snd_soc_component_get_drvdata(dai->component);
+
+	codec->bclk_ratio = ratio;
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops cs40l50_dai_ops = {
+	.set_fmt = cs40l50_set_dai_fmt,
+	.set_bclk_ratio = cs40l50_set_dai_bclk_ratio,
+	.hw_params = cs40l50_hw_params,
+};
+
+static struct snd_soc_dai_driver cs40l50_dai[] = {
+	{
+		.name = "cs40l50-pcm",
+		.id = 0,
+		.playback = {
+			.stream_name = "ASP Playback",
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = SNDRV_PCM_RATE_48000,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+		},
+		.ops = &cs40l50_dai_ops,
+	},
+};
+
+static int cs40l50_codec_probe(struct snd_soc_component *component)
+{
+	struct cs40l50_codec *codec = snd_soc_component_get_drvdata(component);
+
+	codec->bclk_ratio = CS40L50_BCLK_RATIO_DEFAULT;
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver soc_codec_dev_cs40l50 = {
+	.probe = cs40l50_codec_probe,
+	.dapm_widgets = cs40l50_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(cs40l50_dapm_widgets),
+	.dapm_routes = cs40l50_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(cs40l50_dapm_routes),
+};
+
+static int cs40l50_codec_driver_probe(struct platform_device *pdev)
+{
+	struct cs40l50 *cs40l50 = dev_get_drvdata(pdev->dev.parent);
+	struct cs40l50_codec *codec;
+
+	codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL);
+	if (!codec)
+		return -ENOMEM;
+
+	codec->regmap = cs40l50->regmap;
+	codec->dev = &pdev->dev;
+
+	return devm_snd_soc_register_component(&pdev->dev, &soc_codec_dev_cs40l50,
+					       cs40l50_dai, ARRAY_SIZE(cs40l50_dai));
+}
+
+static const struct platform_device_id cs40l50_id[] = {
+	{ .name = "cs40l50-codec" },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, cs40l50_id);
+
+static struct platform_driver cs40l50_codec_driver = {
+	.probe = cs40l50_codec_driver_probe,
+	.id_table = cs40l50_id,
+	.driver = {
+		.name = "cs40l50-codec",
+	},
+};
+module_platform_driver(cs40l50_codec_driver);
+
+MODULE_DESCRIPTION("ASoC CS40L50 driver");
+MODULE_AUTHOR("James Ogletree <james.ogletree@cirrus.com>");
+MODULE_LICENSE("GPL");