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Commit 10337b07 authored by Richard Fitzgerald's avatar Richard Fitzgerald Committed by Mark Brown
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ASoC: wm_adsp: Dump scratch registers on DSP shutdown 



The SCRATCH registers are used by firmwares to hold diagnostic
information. Log this during shutdown to assist analysis and debug
of firmwares.

Signed-off-by: default avatarRichard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 26c22a19

sound/soc/codecs/wm_adsp.c

+27 −0
Original line number Diff line number Diff line
@@ -121,6 +121,11 @@ 
#define ADSP2_WDMA_CONFIG_2 0x31

#define ADSP2_RDMA_CONFIG_1 0x34



#define ADSP2_SCRATCH0        0x40

#define ADSP2_SCRATCH1        0x41

#define ADSP2_SCRATCH2        0x42

#define ADSP2_SCRATCH3        0x43



/*

 * ADSP2 Control

 */
@@ -364,6 +369,25 @@ static unsigned int wm_adsp_region_to_reg(struct wm_adsp_region const *mem, 
	}

}



static void wm_adsp2_show_fw_status(struct wm_adsp *dsp)

{

	u16 scratch[4];

	int ret;



	ret = regmap_raw_read(dsp->regmap, dsp->base + ADSP2_SCRATCH0,

				scratch, sizeof(scratch));

	if (ret) {

		adsp_err(dsp, "Failed to read SCRATCH regs: %d\n", ret);

		return;

	}



	adsp_dbg(dsp, "FW SCRATCH 0:0x%x 1:0x%x 2:0x%x 3:0x%x\n",

		 be16_to_cpu(scratch[0]),

		 be16_to_cpu(scratch[1]),

		 be16_to_cpu(scratch[2]),

		 be16_to_cpu(scratch[3]));

}



static int wm_coeff_info(struct snd_kcontrol *kcontrol,

			 struct snd_ctl_elem_info *uinfo)

{
@@ -1898,6 +1922,9 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, 
		break;



	case SND_SOC_DAPM_PRE_PMD:

		/* Log firmware state, it can be useful for analysis */

		wm_adsp2_show_fw_status(dsp);



		dsp->running = false;



		regmap_update_bits(dsp->regmap, dsp->base + ADSP2_CONTROL,