[PATCH v2 0/2] ASoC: Intel: Skylake: Driver updates on DSP firmware

[PATCH v2 0/2] ASoC: Intel: Skylake: Driver updates on DSP firmware

[jeeja.kp]

From: Jeeja KP <jeeja.kp@intel.com>

This patch series provides update on DSP firmware download by optimizing
o updating the dsp register poll method to use accurate timeout.
o optimizing ROM init retries.
o saving the firmware/library context at boot and use this ctx for
downloading the firmware to DSP memory.
o cleanup to store the library manifest data
o release the firmware in cleanup routine.

Changes in v2:
 - changed the title to remove fix as this is optimization.
 - removed already merged 4 patchs

Jeeja KP (2):
  ASoC: Intel: bxtn: Store the FW/Library context at boot
  ASoC: Intel: bxtn: optimize ROM init retries

 sound/soc/intel/skylake/bxt-sst.c | 82 +++++++++++++++++++++++++--------------
 1 file changed, 52 insertions(+), 30 deletions(-)

-- 
2.5.0

[PATCH v2 1/2] ASoC: Intel: bxtn: Store the FW/Library context at boot

[jeeja.kp]

From: Jeeja KP <jeeja.kp@intel.com>

Store the DSP firmware/library at boot, so that for S3 to S0 transition
use the stored ctx for downloading the firmware to DSP memory.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
---
 sound/soc/intel/skylake/bxt-sst.c | 55 +++++++++++++++++++++++++--------------
 1 file changed, 36 insertions(+), 19 deletions(-)

diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c
index 15a063a..7762d5a 100644
--- a/sound/soc/intel/skylake/bxt-sst.c
+++ b/sound/soc/intel/skylake/bxt-sst.c
@@ -50,33 +50,47 @@ static unsigned int bxt_get_errorcode(struct sst_dsp *ctx)
 	 return sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE);
 }
 
+static void sst_bxt_release_library(struct skl_lib_info *linfo, int lib_count)
+{
+	int i;
+
+	for (i = 1; i < lib_count; i++) {
+		if (linfo[i].fw) {
+			release_firmware(linfo[i].fw);
+			linfo[i].fw = NULL;
+		}
+	}
+}
+
 static int
 bxt_load_library(struct sst_dsp *ctx, struct skl_lib_info *linfo, int lib_count)
 {
 	struct snd_dma_buffer dmab;
 	struct skl_sst *skl = ctx->thread_context;
-	const struct firmware *fw = NULL;
 	struct firmware stripped_fw;
 	int ret = 0, i, dma_id, stream_tag;
 
 	/* library indices start from 1 to N. 0 represents base FW */
 	for (i = 1; i < lib_count; i++) {
-		ret = request_firmware(&fw, linfo[i].name, ctx->dev);
-		if (ret < 0) {
-			dev_err(ctx->dev, "Request lib %s failed:%d\n",
+		if (linfo[i].fw == NULL) {
+			ret = request_firmware(&linfo[i].fw, linfo[i].name,
+						ctx->dev);
+			if (ret < 0) {
+				dev_err(ctx->dev, "Request lib %s failed:%d\n",
 					linfo[i].name, ret);
-			return ret;
+				goto load_library_failed;
+			}
 		}
 
 		if (skl->is_first_boot) {
-			ret = snd_skl_parse_uuids(ctx, fw,
+			ret = snd_skl_parse_uuids(ctx, linfo[i].fw,
 					BXT_ADSP_FW_BIN_HDR_OFFSET, i);
 			if (ret < 0)
 				goto load_library_failed;
 		}
 
-		stripped_fw.data = fw->data;
-		stripped_fw.size = fw->size;
+		stripped_fw.data = linfo[i].fw->data;
+		stripped_fw.size = linfo[i].fw->size;
 		skl_dsp_strip_extended_manifest(&stripped_fw);
 
 		stream_tag = ctx->dsp_ops.prepare(ctx->dev, 0x40,
@@ -99,14 +113,12 @@ bxt_load_library(struct sst_dsp *ctx, struct skl_lib_info *linfo, int lib_count)
 
 		ctx->dsp_ops.trigger(ctx->dev, false, stream_tag);
 		ctx->dsp_ops.cleanup(ctx->dev, &dmab, stream_tag);
-		release_firmware(fw);
-		fw = NULL;
 	}
 
 	return ret;
 
 load_library_failed:
-	release_firmware(fw);
+	sst_bxt_release_library(linfo, lib_count);
 	return ret;
 }
 
@@ -208,16 +220,14 @@ static int bxt_load_base_firmware(struct sst_dsp *ctx)
 	struct skl_sst *skl = ctx->thread_context;
 	int ret;
 
-	ret = request_firmware(&ctx->fw, ctx->fw_name, ctx->dev);
-	if (ret < 0) {
-		dev_err(ctx->dev, "Request firmware failed %d\n", ret);
-		goto sst_load_base_firmware_failed;
+	if (ctx->fw == NULL) {
+		ret = request_firmware(&ctx->fw, ctx->fw_name, ctx->dev);
+		if (ret < 0) {
+			dev_err(ctx->dev, "Request firmware failed %d\n", ret);
+			return ret;
+		}
 	}
 
-	/* check for extended manifest */
-	if (ctx->fw == NULL)
-		goto sst_load_base_firmware_failed;
-
 	/* prase uuids on first boot */
 	if (skl->is_first_boot) {
 		ret = snd_skl_parse_uuids(ctx, ctx->fw, BXT_ADSP_FW_BIN_HDR_OFFSET, 0);
@@ -265,8 +275,11 @@ static int bxt_load_base_firmware(struct sst_dsp *ctx)
 		}
 	}
 
+	return ret;
+
 sst_load_base_firmware_failed:
 	release_firmware(ctx->fw);
+	ctx->fw = NULL;
 	return ret;
 }
 
@@ -635,6 +648,10 @@ EXPORT_SYMBOL_GPL(bxt_sst_init_fw);
 
 void bxt_sst_dsp_cleanup(struct device *dev, struct skl_sst *ctx)
 {
+
+	sst_bxt_release_library(ctx->lib_info, ctx->lib_count);
+	if (ctx->dsp->fw)
+		release_firmware(ctx->dsp->fw);
 	skl_freeup_uuid_list(ctx);
 	skl_ipc_free(&ctx->ipc);
 	ctx->dsp->cl_dev.ops.cl_cleanup_controller(ctx->dsp);
-- 
2.5.0

[PATCH v2 2/2] ASoC: Intel: bxtn: optimize ROM init retries

[jeeja.kp]

From: Jeeja KP <jeeja.kp@intel.com>

During S3->S0 transition, sometime ROM init fails because of
authentication engine loads later than the OS. In this case driver
waits for a longer period and then retries the FW download causing
huge delay in resume time of audio device.

To avoid this, ROM INIT wait time is set to a optimal value and
increased the retries for firmware download.

Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
---
 sound/soc/intel/skylake/bxt-sst.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c
index 7762d5a..d3be1be 100644
--- a/sound/soc/intel/skylake/bxt-sst.c
+++ b/sound/soc/intel/skylake/bxt-sst.c
@@ -25,7 +25,8 @@
 #include "skl-sst-ipc.h"
 
 #define BXT_BASEFW_TIMEOUT	3000
-#define BXT_INIT_TIMEOUT	500
+#define BXT_INIT_TIMEOUT	300
+#define BXT_ROM_INIT_TIMEOUT	70
 #define BXT_IPC_PURGE_FW	0x01004000
 
 #define BXT_ROM_INIT		0x5
@@ -45,6 +46,8 @@
 /* Delay before scheduling D0i3 entry */
 #define BXT_D0I3_DELAY 5000
 
+#define BXT_FW_ROM_INIT_RETRY 3
+
 static unsigned int bxt_get_errorcode(struct sst_dsp *ctx)
 {
 	 return sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE);
@@ -185,7 +188,7 @@ static int sst_bxt_prepare_fw(struct sst_dsp *ctx,
 
 	/* Step 7: Wait for ROM init */
 	ret = sst_dsp_register_poll(ctx, BXT_ADSP_FW_STATUS, SKL_FW_STS_MASK,
-			SKL_FW_INIT, BXT_INIT_TIMEOUT, "ROM Load");
+			SKL_FW_INIT, BXT_ROM_INIT_TIMEOUT, "ROM Load");
 	if (ret < 0) {
 		dev_err(ctx->dev, "Timeout for ROM init, ret:%d\n", ret);
 		goto base_fw_load_failed;
@@ -218,7 +221,7 @@ static int bxt_load_base_firmware(struct sst_dsp *ctx)
 {
 	struct firmware stripped_fw;
 	struct skl_sst *skl = ctx->thread_context;
-	int ret;
+	int ret, i;
 
 	if (ctx->fw == NULL) {
 		ret = request_firmware(&ctx->fw, ctx->fw_name, ctx->dev);
@@ -239,18 +242,20 @@ static int bxt_load_base_firmware(struct sst_dsp *ctx)
 	stripped_fw.size = ctx->fw->size;
 	skl_dsp_strip_extended_manifest(&stripped_fw);
 
-	ret = sst_bxt_prepare_fw(ctx, stripped_fw.data, stripped_fw.size);
-	/* Retry Enabling core and ROM load. Retry seemed to help */
-	if (ret < 0) {
+
+	for (i = 0; i < BXT_FW_ROM_INIT_RETRY; i++) {
 		ret = sst_bxt_prepare_fw(ctx, stripped_fw.data, stripped_fw.size);
-		if (ret < 0) {
-			dev_err(ctx->dev, "Error code=0x%x: FW status=0x%x\n",
+		if (ret == 0)
+			break;
+	}
+
+	if (ret < 0) {
+		dev_err(ctx->dev, "Error code=0x%x: FW status=0x%x\n",
 			sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE),
 			sst_dsp_shim_read(ctx, BXT_ADSP_FW_STATUS));
 
-			dev_err(ctx->dev, "Core En/ROM load fail:%d\n", ret);
-			goto sst_load_base_firmware_failed;
-		}
+		dev_err(ctx->dev, "Core En/ROM load fail:%d\n", ret);
+		goto sst_load_base_firmware_failed;
 	}
 
 	ret = sst_transfer_fw_host_dma(ctx);
-- 
2.5.0

Re: [PATCH v2 1/2] ASoC: Intel: bxtn: Store the FW/Library context at boot

[Liam Girdwood]

On Thu, 2017-01-12 at 09:54 +0530, jeeja.kp@intel.com wrote:
> From: Jeeja KP <jeeja.kp@intel.com>
> 
> Store the DSP firmware/library at boot, so that for S3 to S0 transition
> use the stored ctx for downloading the firmware to DSP memory.
> 
> Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
> ---
>  sound/soc/intel/skylake/bxt-sst.c | 55 +++++++++++++++++++++++++--------------
>  1 file changed, 36 insertions(+), 19 deletions(-)
> 
> diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c
> index 15a063a..7762d5a 100644
> --- a/sound/soc/intel/skylake/bxt-sst.c
> +++ b/sound/soc/intel/skylake/bxt-sst.c
> @@ -50,33 +50,47 @@ static unsigned int bxt_get_errorcode(struct sst_dsp *ctx)
>  	 return sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE);
>  }
>  
> +static void sst_bxt_release_library(struct skl_lib_info *linfo, int lib_count)
> +{
> +	int i;
> +
> +	for (i = 1; i < lib_count; i++) {

It probably makes sense to replace 1 with a macro here to indicate the
first non base FW ID number. This can be done in other places too to
make the  code more readable for library management.

Liam

Re: [PATCH v2 1/2] ASoC: Intel: bxtn: Store the FW/Library context at boot

[Jeeja KP]

On Thu, Jan 12, 2017 at 08:11:21AM +0000, Liam Girdwood wrote:
> On Thu, 2017-01-12 at 09:54 +0530, jeeja.kp@intel.com wrote:
> > From: Jeeja KP <jeeja.kp@intel.com>
> > 
> > Store the DSP firmware/library at boot, so that for S3 to S0 transition
> > use the stored ctx for downloading the firmware to DSP memory.
> > 
> > Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
> > ---
> >  sound/soc/intel/skylake/bxt-sst.c | 55 +++++++++++++++++++++++++--------------
> >  1 file changed, 36 insertions(+), 19 deletions(-)
> > 
> > diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c
> > index 15a063a..7762d5a 100644
> > --- a/sound/soc/intel/skylake/bxt-sst.c
> > +++ b/sound/soc/intel/skylake/bxt-sst.c
> > @@ -50,33 +50,47 @@ static unsigned int bxt_get_errorcode(struct sst_dsp *ctx)
> >  	 return sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE);
> >  }
> >  
> > +static void sst_bxt_release_library(struct skl_lib_info *linfo, int lib_count)
> > +{
> > +	int i;
> > +
> > +	for (i = 1; i < lib_count; i++) {
> 
> It probably makes sense to replace 1 with a macro here to indicate the
> first non base FW ID number. This can be done in other places too to
> make the  code more readable for library management.
>
sure, will add a macro for the non base FW ID and will address this 
as a separate patch as this is used in other places as well. 

> Liam
> 
> 

--