On Mon, 04 Jul 2016 18:53:48 +0200, Stephen Just wrote:
The Surface 3 uses an RT5645 audio codec, but the ACPI identifier used is that for the RT5640. Use a DMI match to override the driver_data provided by ACPI to workaround ID conflict.
Cc: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Cc: Mark Brown broonie@kernel.org Cc: Vinod Koul vinod.koul@intel.com Signed-off-by: Stephen Just stephenjust@gmail.com
sound/soc/intel/atom/sst/sst_acpi.c | 29 ++++++++++++++++++++++++++++- sound/soc/intel/boards/cht_bsw_rt5645.c | 1 + 2 files changed, 29 insertions(+), 1 deletion(-)
v1 -> v2: No change
diff --git a/sound/soc/intel/atom/sst/sst_acpi.c b/sound/soc/intel/atom/sst/sst_acpi.c index 3bc4b63..ef40608 100644 --- a/sound/soc/intel/atom/sst/sst_acpi.c +++ b/sound/soc/intel/atom/sst/sst_acpi.c @@ -19,6 +19,7 @@ */
#include <linux/module.h> +#include <linux/dmi.h> #include <linux/fs.h> #include <linux/interrupt.h> #include <linux/slab.h> @@ -131,6 +132,8 @@ static struct sst_platform_info chv_platform_data = { .platform = "sst-mfld-platform", };
+static const struct dmi_system_id dmi_platform_quirk_table[];
static int sst_platform_get_resources(struct intel_sst_drv *ctx) { struct resource *rsrc; @@ -224,6 +227,7 @@ static int sst_acpi_probe(struct platform_device *pdev) struct platform_device *mdev; struct platform_device *plat_dev; struct sst_platform_info *pdata;
const struct dmi_system_id *dmi_match; unsigned int dev_id;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
@@ -231,7 +235,13 @@ static int sst_acpi_probe(struct platform_device *pdev) return -ENODEV; dev_dbg(dev, "for %s", id->id);
- mach = (struct sst_acpi_mach *)id->driver_data;
- /* check for quirk when getting driver_data */
- dmi_match = dmi_first_match(dmi_platform_quirk_table);
- if (dmi_match)
mach = (struct sst_acpi_mach *)dmi_match->driver_data;
dmi_system_id.driver_data is void*, so you need no cast here (unlike acpi_device_id below).
- else
mach = (struct sst_acpi_mach *)id->driver_data;- mach = sst_acpi_find_machine(mach); if (mach == NULL) { dev_err(dev, "No matching machine driver found\n");
@@ -345,7 +355,24 @@ static struct sst_acpi_mach sst_acpi_chv[] = { /* some CHT-T platforms rely on RT5640, use Baytrail machine driver */ {"10EC5640", "bytcr_rt5640", "intel/fw_sst_22a8.bin", "bytcr_rt5640", NULL, &chv_platform_data },
- {},
+};
+static struct sst_acpi_mach sst_acpi_chv_quirk[] = {
- /* some CHT-T platforms rely on RT5645 but use the ID from RT5640 */
- {"10EC5640", "cht-bsw-rt5645", "intel/fw_sst_22a8.bin", "cht-bsw", NULL,
&chv_platform_data },- {},
+};
+static const struct dmi_system_id dmi_platform_quirk_table[] = {
- {
.matches = {DMI_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"),DMI_MATCH(DMI_PRODUCT_NAME, "Surface 3"),},.driver_data = (unsigned long *) &sst_acpi_chv_quirk,
Why cast to unsigned long pointer...?
Takashi