On devices with 2 cameras and no _DSM / EFI-vars providing CsiPort clock info, defaulting to CsiPort 0 obviously is wrong for 1 of the 2 cameras. The Intel Cherry Trail (ISP2401) reference design combines: pmc_plt_clk_2 with CsiPort 0 pmc_plt_clk_4 with CsiPort 1 The Intel Bay Trail (ISP2400) reference design combines: pmc_plt_clk_1 with CsiPort 0 pmc_plt_clk_0 with CsiPort 1 Use this knowledge to set the default CsiPort value based on the detected CLK for the sensor. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- .../media/atomisp/pci/atomisp_gmin_platform.c | 23 +++++++++++++------ 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c index 84a453118bd9..544e3e7b3aaf 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c +++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c @@ -540,7 +540,7 @@ static int gmin_subdev_add(struct gmin_subdev *gs) struct i2c_client *client = v4l2_get_subdevdata(gs->subdev); struct device *dev = &client->dev; struct acpi_device *adev = ACPI_COMPANION(dev); - int ret, clock_num = -1; + int ret, default_val, clock_num = -1; dev_info(dev, "%s: ACPI path is %pfw\n", __func__, dev_fwnode(dev)); @@ -548,7 +548,20 @@ static int gmin_subdev_add(struct gmin_subdev *gs) gs->clock_src = gmin_get_var_int(dev, false, "ClkSrc", VLV2_CLK_PLL_19P2MHZ); - gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", 0); + /* + * Get ACPI _PR0 derived clock here already because it is used + * to determine the csi_port default. + */ + if (acpi_device_power_manageable(adev)) + clock_num = atomisp_get_acpi_power(dev); + + /* Compare clock to CsiPort 1 pmc-clock used in the CHT/BYT reference designs */ + if (IS_ISP2401) + default_val = clock_num == 4 ? 1 : 0; + else + default_val = clock_num == 0 ? 1 : 0; + + gs->csi_port = gmin_get_var_int(dev, false, "CsiPort", default_val); gs->csi_lanes = gmin_get_var_int(dev, false, "CsiLanes", 1); gs->gpio0 = gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); @@ -629,11 +642,7 @@ static int gmin_subdev_add(struct gmin_subdev *gs) * otherwise. */ - /* Try first to use ACPI to get the clock resource */ - if (acpi_device_power_manageable(adev)) - clock_num = atomisp_get_acpi_power(dev); - - /* Fall-back use EFI and/or DMI match */ + /* If getting the clock from _PR0 above failed, fall-back to EFI and/or DMI match */ if (clock_num < 0) clock_num = gmin_get_var_int(dev, false, "CamClk", 0); -- 2.33.1
