[PATCH] drm/amd/amdgpu: Add GPIO resources required for amdisp

[Pratap Nirujogi]

ISP is a child device to GFX, and its device specific information
is not available in ACPI. Adding the 2 GPIO resources required for
ISP_v4_1_1 in amdgpu_isp driver.

- GPIO 0 to allow sensor driver to enable and disable sensor module.
- GPIO 85 to allow ISP driver to enable and disable ISP RGB streaming mode.

Signed-off-by: Pratap Nirujogi <pratap.niruj...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c | 46 +++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c 
b/drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c
index 69dd92f6e86d..c488af6c8013 100644
--- a/drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c
@@ -25,6 +25,7 @@
  *
  */
 
+#include <linux/gpio/machine.h>
 #include "amdgpu.h"
 #include "isp_v4_1_1.h"
 
@@ -39,15 +40,60 @@ static const unsigned int 
isp_4_1_1_int_srcid[MAX_ISP411_INT_SRC] = {
        ISP_4_1__SRCID__ISP_RINGBUFFER_WPT16
 };
 
+static struct gpiod_lookup_table isp_gpio_table = {
+       .dev_id = "amd_isp_capture",
+       .table = {
+               GPIO_LOOKUP("AMDI0030:00", 85, "enable_isp", GPIO_ACTIVE_HIGH),
+               { }
+       },
+};
+
+static struct gpiod_lookup_table isp_sensor_gpio_table = {
+       .dev_id = "i2c-ov05c10",
+       .table = {
+               GPIO_LOOKUP("amdisp-pinctrl", 0, "enable", GPIO_ACTIVE_HIGH),
+               { }
+       },
+};
+
+static const struct acpi_device_id isp_sensor_ids[] = {
+       { "OMNI5C10" },
+       { }
+};
+
+static int isp_match_acpi_device_ids(struct device *dev, const void *data)
+{
+       return acpi_match_device(data, dev) ? 1 : 0;
+}
+
 static int isp_v4_1_1_hw_init(struct amdgpu_isp *isp)
 {
        struct amdgpu_device *adev = isp->adev;
+       struct acpi_device *acpi_pdev;
        int idx, int_idx, num_res, r;
+       struct device *pdev;
        u64 isp_base;
 
        if (adev->rmmio_size == 0 || adev->rmmio_size < 0x5289)
                return -EINVAL;
 
+       pdev = bus_find_device(&platform_bus_type, NULL, isp_sensor_ids,
+                              isp_match_acpi_device_ids);
+       if (!pdev) {
+               drm_dbg(&adev->ddev, "Invalid isp platform detected:%ld",
+                       PTR_ERR(pdev));
+               /* allow GPU init to progress */
+               return 0;
+       }
+       acpi_pdev = ACPI_COMPANION(pdev);
+
+       /* add GPIO resources required for OMNI5C10 sensor */
+       if (!strcmp("OMNI5C10", acpi_device_hid(acpi_pdev))) {
+               gpiod_add_lookup_table(&isp_gpio_table);
+               gpiod_add_lookup_table(&isp_sensor_gpio_table);
+       }
+       put_device(pdev);
+
        isp_base = adev->rmmio_base;
 
        isp->isp_cell = kcalloc(3, sizeof(struct mfd_cell), GFP_KERNEL);
-- 
2.43.0