From 2434caf098588856d1c332d2f60b8a2d8a198450 Mon Sep 17 00:00:00 2001 From: Jeeja KP Date: Mon, 23 Nov 2015 22:26:27 +0530 Subject: [PATCH] ASoC: Intel: Skylake: Poll CLDMA RUN bit when set This patch adds polling of CLDMA stream run bit when set to confirm the HW reports the same value. Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul Signed-off-by: Mark Brown --- sound/soc/intel/skylake/skl-sst-cldma.c | 43 +++++++++++++++++-------- 1 file changed, 29 insertions(+), 14 deletions(-) diff --git a/sound/soc/intel/skylake/skl-sst-cldma.c b/sound/soc/intel/skylake/skl-sst-cldma.c index 947a08e42e86..8c7e8576cba3 100644 --- a/sound/soc/intel/skylake/skl-sst-cldma.c +++ b/sound/soc/intel/skylake/skl-sst-cldma.c @@ -18,6 +18,7 @@ #include #include #include +#include #include "../common/sst-dsp.h" #include "../common/sst-dsp-priv.h" @@ -33,6 +34,32 @@ void skl_cldma_int_disable(struct sst_dsp *ctx) SKL_ADSP_REG_ADSPIC, SKL_ADSPIC_CL_DMA, 0); } +static void skl_cldma_stream_run(struct sst_dsp *ctx, bool enable) +{ + unsigned char val; + int timeout; + + sst_dsp_shim_update_bits_unlocked(ctx, + SKL_ADSP_REG_CL_SD_CTL, + CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(enable)); + + udelay(3); + timeout = 300; + do { + /* waiting for hardware to report that the stream Run bit set */ + val = sst_dsp_shim_read(ctx, SKL_ADSP_REG_CL_SD_CTL) & + CL_SD_CTL_RUN_MASK; + if (enable && val) + break; + else if (!enable && !val) + break; + udelay(3); + } while (--timeout); + + if (timeout == 0) + dev_err(ctx->dev, "Failed to set Run bit=%d enable=%d\n", val, enable); +} + /* Code loader helper APIs */ static void skl_cldma_setup_bdle(struct sst_dsp *ctx, struct snd_dma_buffer *dmab_data, @@ -107,18 +134,6 @@ static void skl_cldma_cleanup_spb(struct sst_dsp *ctx) sst_dsp_shim_write_unlocked(ctx, SKL_ADSP_REG_CL_SPBFIFO_SPIB, 0); } -static void skl_cldma_trigger(struct sst_dsp *ctx, bool enable) -{ - if (enable) - sst_dsp_shim_update_bits_unlocked(ctx, - SKL_ADSP_REG_CL_SD_CTL, - CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(1)); - else - sst_dsp_shim_update_bits_unlocked(ctx, - SKL_ADSP_REG_CL_SD_CTL, - CL_SD_CTL_RUN_MASK, CL_SD_CTL_RUN(0)); -} - static void skl_cldma_cleanup(struct sst_dsp *ctx) { skl_cldma_cleanup_spb(ctx); @@ -167,7 +182,7 @@ static int skl_cldma_wait_interruptible(struct sst_dsp *ctx) static void skl_cldma_stop(struct sst_dsp *ctx) { - ctx->cl_dev.ops.cl_trigger(ctx, false); + skl_cldma_stream_run(ctx, false); } static void skl_cldma_fill_buffer(struct sst_dsp *ctx, unsigned int size, @@ -309,7 +324,7 @@ int skl_cldma_prepare(struct sst_dsp *ctx) ctx->cl_dev.ops.cl_setup_controller = skl_cldma_setup_controller; ctx->cl_dev.ops.cl_setup_spb = skl_cldma_setup_spb; ctx->cl_dev.ops.cl_cleanup_spb = skl_cldma_cleanup_spb; - ctx->cl_dev.ops.cl_trigger = skl_cldma_trigger; + ctx->cl_dev.ops.cl_trigger = skl_cldma_stream_run; ctx->cl_dev.ops.cl_cleanup_controller = skl_cldma_cleanup; ctx->cl_dev.ops.cl_copy_to_dmabuf = skl_cldma_copy_to_buf; ctx->cl_dev.ops.cl_stop_dma = skl_cldma_stop;