[PATCH 5.4 076/110] ASoC: Intel: cht_bsw_rt5645: Add quirk for boards using pmc_plt_clk_0

Greg Kroah-Hartman
2020-01-30T18:45:03Z

From: Sam McNally <sammc@chromium.org>

[ Upstream commit adebb11139029ddf1fba6f796c4a476f17eacddc ]

As of commit 648e921888ad ("clk: x86: Stop marking clocks as
CLK_IS_CRITICAL"), the cht_bsw_rt5645 driver needs to enable the clock
it's using for the codec's mclk. It does this from commit 7735bce05a9c
("ASoC: Intel: boards: use devm_clk_get() unconditionally"), enabling
pmc_plt_clk_3. However, Strago family Chromebooks use pmc_plt_clk_0 for
the codec mclk, resulting in white noise with some digital microphones.
Add a DMI-based quirk for Strago family Chromebooks to use pmc_plt_clk_0
instead - mirroring the changes made to cht_bsw_max98090_ti in
commit a182ecd3809c ("ASoC: intel: cht_bsw_max98090_ti: Add quirk for
boards using pmc_plt_clk_0") and making use of the existing
dmi_check_system() call and related infrastructure added in
commit 22af29114eb4 ("ASoC: Intel: cht-bsw-rt5645: add quirks for
SSP0/AIF1/AIF2 routing").

Signed-off-by: Sam McNally <sammc@chromium.org>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190917054933.209335-1-sammc@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/soc/intel/boards/cht_bsw_rt5645.c | 26 +++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/sound/soc/intel/boards/cht_bsw_rt5645.c b/sound/soc/intel/boards/cht_bsw_rt5645.c
index 8879c3be29d5a..c68a5b85a4a03 100644
--- a/sound/soc/intel/boards/cht_bsw_rt5645.c
+++ b/sound/soc/intel/boards/cht_bsw_rt5645.c
@@ -48,6 +48,7 @@ struct cht_mc_private {
#define CHT_RT5645_SSP2_AIF2 BIT(16) /* default is using AIF1 */
#define CHT_RT5645_SSP0_AIF1 BIT(17)
#define CHT_RT5645_SSP0_AIF2 BIT(18)
+#define CHT_RT5645_PMC_PLT_CLK_0 BIT(19)

static unsigned long cht_rt5645_quirk = 0;

@@ -59,6 +60,8 @@ static void log_quirks(struct device *dev)
dev_info(dev, "quirk SSP0_AIF1 enabled");
if (cht_rt5645_quirk & CHT_RT5645_SSP0_AIF2)
dev_info(dev, "quirk SSP0_AIF2 enabled");
+ if (cht_rt5645_quirk & CHT_RT5645_PMC_PLT_CLK_0)
+ dev_info(dev, "quirk PMC_PLT_CLK_0 enabled");
}

static int platform_clock_control(struct snd_soc_dapm_widget *w,
@@ -226,15 +229,21 @@ static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
return 0;
}

-/* uncomment when we have a real quirk
static int cht_rt5645_quirk_cb(const struct dmi_system_id *id)
{
cht_rt5645_quirk = (unsigned long)id->driver_data;
return 1;
}
-*/

static const struct dmi_system_id cht_rt5645_quirk_table[] = {
+ {
+ /* Strago family Chromebooks */
+ .callback = cht_rt5645_quirk_cb,
+ .matches = {
+ DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
+ },
+ .driver_data = (void *)CHT_RT5645_PMC_PLT_CLK_0,
+ },
{
},
};
@@ -526,6 +535,7 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
int dai_index = 0;
int ret_val = 0;
int i;
+ const char *mclk_name;

drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
if (!drv)
@@ -662,11 +672,15 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
if (ret_val)
return ret_val;

- drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
+ if (cht_rt5645_quirk & CHT_RT5645_PMC_PLT_CLK_0)
+ mclk_name = "pmc_plt_clk_0";
+ else
+ mclk_name = "pmc_plt_clk_3";
+
+ drv->mclk = devm_clk_get(&pdev->dev, mclk_name);
if (IS_ERR(drv->mclk)) {
- dev_err(&pdev->dev,
- "Failed to get MCLK from pmc_plt_clk_3: %ld\n",
- PTR_ERR(drv->mclk));
+ dev_err(&pdev->dev, "Failed to get MCLK from %s: %ld\n",
+ mclk_name, PTR_ERR(drv->mclk));
return PTR_ERR(drv->mclk);
}

--
2.20.1