ASoC: intel: cht_bsw_max98090_ti: Add quirk for boards using pmc_plt_clk_0

Some boards such as the Swanky model Chromebooks use pmc_plt_clk_0 for the
mclk instead of pmc_plt_clk_3.

This commit adds a DMI based quirk for this.

This fixing audio no longer working on these devices after
commit 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
that commit fixes us unnecessary keeping unused clocks on, but in case
of the Swanky that was breaking audio support since we were not using
the right clock in the cht_bsw_max98090_ti machine driver.

Cc: stable@vger.kernel.org
Fixes: 648e921888ad ("clk: x86: Stop marking clocks as CLK_IS_CRITICAL")
Reported-and-tested-by: Dean Wallace <duffydack73@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/intel/boards/cht_bsw_max98090_ti.c b/sound/soc/intel/boards/cht_bsw_max98090_ti.c
index db6976f4ddaa28b9eb0e123b93d9952cd1869634..9d9f6e41d81c079796cb7bec6d9422bd6cbb5c67 100644 (file)
--- a/sound/soc/intel/boards/cht_bsw_max98090_ti.c
+++ b/sound/soc/intel/boards/cht_bsw_max98090_ti.c
@@ -19,6 +19,7 @@
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */
 
+#include <linux/dmi.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -35,6 +36,8 @@
 #define CHT_PLAT_CLK_3_HZ      19200000
 #define CHT_CODEC_DAI  "HiFi"
 
+#define QUIRK_PMC_PLT_CLK_0                            0x01
+
 struct cht_mc_private {
        struct clk *mclk;
        struct snd_soc_jack jack;
@@ -385,11 +388,29 @@ static struct snd_soc_card snd_soc_card_cht = {
        .num_controls = ARRAY_SIZE(cht_mc_controls),
 };
 
+static const struct dmi_system_id cht_max98090_quirk_table[] = {
+       {
+               /* Swanky model Chromebook (Toshiba Chromebook 2) */
+               .matches = {
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Swanky"),
+               },
+               .driver_data = (void *)QUIRK_PMC_PLT_CLK_0,
+       },
+       {}
+};
+
 static int snd_cht_mc_probe(struct platform_device *pdev)
 {
+       const struct dmi_system_id *dmi_id;
        struct device *dev = &pdev->dev;
        int ret_val = 0;
        struct cht_mc_private *drv;
+       const char *mclk_name;
+       int quirks = 0;
+
+       dmi_id = dmi_first_match(cht_max98090_quirk_table);
+       if (dmi_id)
+               quirks = (unsigned long)dmi_id->driver_data;
 
        drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
        if (!drv)
@@ -411,11 +432,16 @@ static int snd_cht_mc_probe(struct platform_device *pdev)
        snd_soc_card_cht.dev = &pdev->dev;
        snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
 
-       drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
+       if (quirks & QUIRK_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));
+                       "Failed to get MCLK from %s: %ld\n",
+                       mclk_name, PTR_ERR(drv->mclk));
                return PTR_ERR(drv->mclk);
        }