The patch
ASoC: Intel: Add helper to poll register for DSP status
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
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.
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Thanks, Mark
From 7a2c52b61fd71eddda3385006962630444d15b9e Mon Sep 17 00:00:00 2001
From: "Subhransu S. Prusty" subhransu.s.prusty@intel.com Date: Thu, 9 Jul 2015 21:38:52 +0530 Subject: [PATCH] ASoC: Intel: Add helper to poll register for DSP status
This patch adds helper to poll register for DSP status.
Signed-off-by: Subhransu S. Prusty subhransu.s.prusty@intel.com Signed-off-by: Kp, Jeeja jeeja.kp@intel.com Signed-off-by: Vinod Koul vinod.koul@intel.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/intel/common/sst-dsp.c | 43 ++++++++++++++++++++++++++++++++++++++++ sound/soc/intel/common/sst-dsp.h | 2 ++ 2 files changed, 45 insertions(+)
diff --git a/sound/soc/intel/common/sst-dsp.c b/sound/soc/intel/common/sst-dsp.c index 64e94212d2d2..cc25f4c202af 100644 --- a/sound/soc/intel/common/sst-dsp.c +++ b/sound/soc/intel/common/sst-dsp.c @@ -20,6 +20,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> +#include <linux/delay.h>
#include "sst-dsp.h" #include "sst-dsp-priv.h" @@ -222,6 +223,48 @@ int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset, } EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
+int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask, + u32 target, u32 timeout, char *operation) +{ + int time, ret; + u32 reg; + bool done = false; + + /* + * we will poll for couple of ms using mdelay, if not successful + * then go to longer sleep using usleep_range + */ + + /* check if set state successful */ + for (time = 0; time < 5; time++) { + if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) { + done = true; + break; + } + mdelay(1); + } + + if (done == false) { + /* sleeping in 10ms steps so adjust timeout value */ + timeout /= 10; + + for (time = 0; time < timeout; time++) { + if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) + break; + + usleep_range(5000, 10000); + } + } + + reg = sst_dsp_shim_read_unlocked(ctx, offset); + dev_info(ctx->dev, "FW Poll Status: reg=%#x %s %s\n", reg, operation, + (time < timeout) ? "successful" : "timedout"); + ret = time < timeout ? 0 : -ETIME; + + return ret; +} +EXPORT_SYMBOL_GPL(sst_dsp_register_poll); + void sst_dsp_dump(struct sst_dsp *sst) { if (sst->ops->dump) diff --git a/sound/soc/intel/common/sst-dsp.h b/sound/soc/intel/common/sst-dsp.h index 96aeb2556ad4..cc3197be4cf7 100644 --- a/sound/soc/intel/common/sst-dsp.h +++ b/sound/soc/intel/common/sst-dsp.h @@ -278,6 +278,8 @@ void sst_dsp_inbox_read(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_outbox_write(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_outbox_read(struct sst_dsp *dsp, void *message, size_t bytes); void sst_dsp_mailbox_dump(struct sst_dsp *dsp, size_t bytes); +int sst_dsp_register_poll(struct sst_dsp *dsp, u32 offset, u32 mask, + u32 expected_value, u32 timeout, char *operation);
/* Debug */ void sst_dsp_dump(struct sst_dsp *sst);