The patch ASoC: SOF: trace: move to opt-in with Kconfig and module parameter has been applied to the asoc tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.5 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 2ab4c50f6955514150f83b47b7aee3ba5fe3ac1d Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Date: Fri, 27 Sep 2019 15:05:28 -0500 Subject: [PATCH] ASoC: SOF: trace: move to opt-in with Kconfig and module parameter In a number of debug cases, the DMA-based trace can add problems (e.g. with HDaudio channel allocation). It also generates additional traffic on the bus and if the DMA handling is unreliable will prevent audio use-cases from working normally. Using the trace also requires tools to be installed on the target. The trace can be instead handled as dynamic debug. We can use a Kconfig to force the trace to be enabled in all cases, or use a module parameter to enable it on a need-basis, e.g. by setting "options snd_sof sof_debug=0x1" in a /etc/modprobe.d file. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20190927200538.660-4-pierre-louis.bossart@xxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> --- sound/soc/sof/Kconfig | 8 ++++++++ sound/soc/sof/core.c | 25 +++++++++++++++++++------ sound/soc/sof/sof-priv.h | 13 +++++++++---- sound/soc/sof/trace.c | 17 ++++++++++++++++- 4 files changed, 52 insertions(+), 11 deletions(-) diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig index bb8036ae567e..cc592bcadae7 100644 --- a/sound/soc/sof/Kconfig +++ b/sound/soc/sof/Kconfig @@ -142,6 +142,14 @@ config SND_SOC_SOF_DEBUG_ENABLE_DEBUGFS_CACHE Say Y if you want to enable caching the memory windows. If unsure, select "N". +config SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE + bool "SOF enable firmware trace" + help + The firmware trace can be enabled either at build-time with + this option, or dynamically by setting flags in the SOF core + module parameter (similar to dynamic debug) + If unsure, select "N". + config SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST bool "SOF enable IPC flood test" help diff --git a/sound/soc/sof/core.c b/sound/soc/sof/core.c index 81f28f7ff1a0..15167b8220ed 100644 --- a/sound/soc/sof/core.c +++ b/sound/soc/sof/core.c @@ -16,6 +16,11 @@ #include "sof-priv.h" #include "ops.h" +/* see SOF_DBG_ flags */ +int sof_core_debug; +module_param_named(sof_debug, sof_core_debug, int, 0444); +MODULE_PARM_DESC(sof_debug, "SOF core debug options (0x0 all off)"); + /* SOF defaults if not provided by the platform in ms */ #define TIMEOUT_DEFAULT_IPC_MS 500 #define TIMEOUT_DEFAULT_BOOT_MS 2000 @@ -350,12 +355,20 @@ static int sof_probe_continue(struct snd_sof_dev *sdev) goto fw_run_err; } - /* init DMA trace */ - ret = snd_sof_init_trace(sdev); - if (ret < 0) { - /* non fatal */ - dev_warn(sdev->dev, - "warning: failed to initialize trace %d\n", ret); + if (IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE) || + (sof_core_debug & SOF_DBG_ENABLE_TRACE)) { + sdev->dtrace_is_supported = true; + + /* init DMA trace */ + ret = snd_sof_init_trace(sdev); + if (ret < 0) { + /* non fatal */ + dev_warn(sdev->dev, + "warning: failed to initialize trace %d\n", + ret); + } + } else { + dev_dbg(sdev->dev, "SOF firmware trace disabled\n"); } /* hereafter all FW boot flows are for PM reasons */ diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index 730f3259dd02..d5b1a4f895da 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -28,10 +28,14 @@ #include <uapi/sound/sof/fw.h> /* debug flags */ -#define SOF_DBG_REGS BIT(1) -#define SOF_DBG_MBOX BIT(2) -#define SOF_DBG_TEXT BIT(3) -#define SOF_DBG_PCI BIT(4) +#define SOF_DBG_ENABLE_TRACE BIT(0) +#define SOF_DBG_REGS BIT(1) +#define SOF_DBG_MBOX BIT(2) +#define SOF_DBG_TEXT BIT(3) +#define SOF_DBG_PCI BIT(4) + +/* global debug state set by SOF_DBG_ flags */ +extern int sof_core_debug; /* max BARs mmaped devices can use */ #define SND_SOF_BARS 8 @@ -434,6 +438,7 @@ struct snd_sof_dev { int dma_trace_pages; wait_queue_head_t trace_sleep; u32 host_offset; + u32 dtrace_is_supported; /* set with Kconfig or module parameter */ u32 dtrace_is_enabled; u32 dtrace_error; u32 dtrace_draining; diff --git a/sound/soc/sof/trace.c b/sound/soc/sof/trace.c index 4c3cff031fd6..b0e4556c8536 100644 --- a/sound/soc/sof/trace.c +++ b/sound/soc/sof/trace.c @@ -162,6 +162,9 @@ int snd_sof_init_trace_ipc(struct snd_sof_dev *sdev) struct sof_ipc_reply ipc_reply; int ret; + if (!sdev->dtrace_is_supported) + return 0; + if (sdev->dtrace_is_enabled || !sdev->dma_trace_pages) return -EINVAL; @@ -222,6 +225,9 @@ int snd_sof_init_trace(struct snd_sof_dev *sdev) { int ret; + if (!sdev->dtrace_is_supported) + return 0; + /* set false before start initialization */ sdev->dtrace_is_enabled = false; @@ -277,6 +283,9 @@ EXPORT_SYMBOL(snd_sof_init_trace); int snd_sof_trace_update_pos(struct snd_sof_dev *sdev, struct sof_ipc_dma_trace_posn *posn) { + if (!sdev->dtrace_is_supported) + return 0; + if (sdev->dtrace_is_enabled && sdev->host_offset != posn->host_offset) { sdev->host_offset = posn->host_offset; wake_up(&sdev->trace_sleep); @@ -293,6 +302,9 @@ int snd_sof_trace_update_pos(struct snd_sof_dev *sdev, /* an error has occurred within the DSP that prevents further trace */ void snd_sof_trace_notify_for_error(struct snd_sof_dev *sdev) { + if (!sdev->dtrace_is_supported) + return; + if (sdev->dtrace_is_enabled) { dev_err(sdev->dev, "error: waking up any trace sleepers\n"); sdev->dtrace_error = true; @@ -305,7 +317,7 @@ void snd_sof_release_trace(struct snd_sof_dev *sdev) { int ret; - if (!sdev->dtrace_is_enabled) + if (!sdev->dtrace_is_supported || !sdev->dtrace_is_enabled) return; ret = snd_sof_dma_trace_trigger(sdev, SNDRV_PCM_TRIGGER_STOP); @@ -326,6 +338,9 @@ EXPORT_SYMBOL(snd_sof_release_trace); void snd_sof_free_trace(struct snd_sof_dev *sdev) { + if (!sdev->dtrace_is_supported) + return; + snd_sof_release_trace(sdev); snd_dma_free_pages(&sdev->dmatb); -- 2.20.1 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
