Since commit e5d80e82e32e (ASoC: sgtl5000: Convert to use regmap directly) a kernel oops is observed after a suspend/resume sequence.

The kernel oops happens inside sgtl5000_restore_regs() as codec->reg_cache is no longer a valid pointer.

Add the remaining register entries into sgtl5000_reg_defaults[] and remove sgtl5000_restore_regs() completely, which allows suspend/resume to work fine and make the code simpler.

Tested on a im53-qsb board.

Reported-by: Shawn Guo shawn.guo@freescale.com Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- Changes since v4: - Remove sgtl5000_restore_regs() as suggested by Lars-Peter

sound/soc/codecs/sgtl5000.c | 75 +++++++++------------------------------------ 1 file changed, 15 insertions(+), 60 deletions(-)

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c index 9626ee0..3d39f0b 100644 --- a/sound/soc/codecs/sgtl5000.c +++ b/sound/soc/codecs/sgtl5000.c @@ -36,18 +36,32 @@

/* default value of sgtl5000 registers */ static const struct reg_default sgtl5000_reg_defaults[] = { + { SGTL5000_CHIP_DIG_POWER, 0x0000 }, { SGTL5000_CHIP_CLK_CTRL, 0x0008 }, { SGTL5000_CHIP_I2S_CTRL, 0x0010 }, { SGTL5000_CHIP_SSS_CTRL, 0x0010 }, + { SGTL5000_CHIP_ADCDAC_CTRL, 0x020c }, { SGTL5000_CHIP_DAC_VOL, 0x3c3c }, { SGTL5000_CHIP_PAD_STRENGTH, 0x015f }, + { SGTL5000_CHIP_ANA_ADC_CTRL, 0x0000 }, { SGTL5000_CHIP_ANA_HP_CTRL, 0x1818 }, { SGTL5000_CHIP_ANA_CTRL, 0x0111 }, + { SGTL5000_CHIP_LINREG_CTRL, 0x0000 }, + { SGTL5000_CHIP_REF_CTRL, 0x0000 }, + { SGTL5000_CHIP_MIC_CTRL, 0x0000 }, + { SGTL5000_CHIP_LINE_OUT_CTRL, 0x0000 }, { SGTL5000_CHIP_LINE_OUT_VOL, 0x0404 }, { SGTL5000_CHIP_ANA_POWER, 0x7060 }, { SGTL5000_CHIP_PLL_CTRL, 0x5000 }, + { SGTL5000_CHIP_CLK_TOP_CTRL, 0x0000 }, + { SGTL5000_CHIP_ANA_STATUS, 0x0000 }, + { SGTL5000_CHIP_SHORT_CTRL, 0x0000 }, + { SGTL5000_CHIP_ANA_TEST2, 0x0000 }, + { SGTL5000_DAP_CTRL, 0x0000 }, + { SGTL5000_DAP_PEQ, 0x0000 }, { SGTL5000_DAP_BASS_ENHANCE, 0x0040 }, { SGTL5000_DAP_BASS_ENHANCE_CTRL, 0x051f }, + { SGTL5000_DAP_AUDIO_EQ, 0x0000 }, { SGTL5000_DAP_SURROUND, 0x0040 }, { SGTL5000_DAP_EQ_BASS_BAND0, 0x002f }, { SGTL5000_DAP_EQ_BASS_BAND1, 0x002f }, @@ -55,6 +69,7 @@ static const struct reg_default sgtl5000_reg_defaults[] = { { SGTL5000_DAP_EQ_BASS_BAND3, 0x002f }, { SGTL5000_DAP_EQ_BASS_BAND4, 0x002f }, { SGTL5000_DAP_MAIN_CHAN, 0x8000 }, + { SGTL5000_DAP_MIX_CHAN, 0x0000 }, { SGTL5000_DAP_AVC_CTRL, 0x0510 }, { SGTL5000_DAP_AVC_THRESHOLD, 0x1473 }, { SGTL5000_DAP_AVC_ATTACK, 0x0028 }, @@ -1068,71 +1083,11 @@ static int sgtl5000_suspend(struct snd_soc_codec *codec) return 0; }

-/* - * restore all sgtl5000 registers, - * since a big hole between dap and regular registers, - * we will restore them respectively. - */ -static int sgtl5000_restore_regs(struct snd_soc_codec *codec) -{ - u16 *cache = codec->reg_cache; - u16 reg; - - /* restore regular registers */ - for (reg = 0; reg <= SGTL5000_CHIP_SHORT_CTRL; reg += 2) { - - /* These regs should restore in particular order */ - if (reg == SGTL5000_CHIP_ANA_POWER || - reg == SGTL5000_CHIP_CLK_CTRL || - reg == SGTL5000_CHIP_LINREG_CTRL || - reg == SGTL5000_CHIP_LINE_OUT_CTRL || - reg == SGTL5000_CHIP_REF_CTRL) - continue; - - snd_soc_write(codec, reg, cache[reg]); - } - - /* restore dap registers */ - for (reg = SGTL5000_DAP_REG_OFFSET; reg < SGTL5000_MAX_REG_OFFSET; reg += 2) - snd_soc_write(codec, reg, cache[reg]); - - /* - * restore these regs according to the power setting sequence in - * sgtl5000_set_power_regs() and clock setting sequence in - * sgtl5000_set_clock(). - * - * The order of restore is: - * 1. SGTL5000_CHIP_CLK_CTRL MCLK_FREQ bits (1:0) should be restore after - * SGTL5000_CHIP_ANA_POWER PLL bits set - * 2. SGTL5000_CHIP_LINREG_CTRL should be set before - * SGTL5000_CHIP_ANA_POWER LINREG_D restored - * 3. SGTL5000_CHIP_REF_CTRL controls Analog Ground Voltage, - * prefer to resotre it after SGTL5000_CHIP_ANA_POWER restored - */ - snd_soc_write(codec, SGTL5000_CHIP_LINREG_CTRL, - cache[SGTL5000_CHIP_LINREG_CTRL]); - - snd_soc_write(codec, SGTL5000_CHIP_ANA_POWER, - cache[SGTL5000_CHIP_ANA_POWER]); - - snd_soc_write(codec, SGTL5000_CHIP_CLK_CTRL, - cache[SGTL5000_CHIP_CLK_CTRL]); - - snd_soc_write(codec, SGTL5000_CHIP_REF_CTRL, - cache[SGTL5000_CHIP_REF_CTRL]); - - snd_soc_write(codec, SGTL5000_CHIP_LINE_OUT_CTRL, - cache[SGTL5000_CHIP_LINE_OUT_CTRL]); - return 0; -} - static int sgtl5000_resume(struct snd_soc_codec *codec) { /* Bring the codec back up to standby to enable regulators */ sgtl5000_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

- /* Restore registers by cached in memory */ - sgtl5000_restore_regs(codec); return 0; } #else