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Subject[PATCH v3] ASoC: wm_adsp: Dump scratch registers on DSP shutdown
Date
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: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
---
sound/soc/codecs/wm_adsp.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index f6642c1..477390a 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -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,
--
1.7.2.5


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