[PATCH v3] 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>
---
Changes v2 -> v3:

* Add NULL check for acpi_device handle in amdgpu_acpi_get_isp4_dev_hid()

 drivers/gpu/drm/amd/amdgpu/amdgpu.h      |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 31 ++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/isp_v4_1_1.c  | 31 ++++++++++++++++++++++++
 3 files changed, 64 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cc26cf1bd843..2aa7e89a190e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1657,10 +1657,12 @@ static inline void 
amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_cap
 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev);
 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev);
 void amdgpu_choose_low_power_state(struct amdgpu_device *adev);
+int amdgpu_acpi_get_isp4_dev_hid(u8 (*hid)[ACPI_ID_LEN]);
 #else
 static inline bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) { 
return false; }
 static inline bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev) { 
return false; }
 static inline void amdgpu_choose_low_power_state(struct amdgpu_device *adev) { 
}
+static int amdgpu_acpi_get_isp4_dev_hid(u8 (*hid)[ACPI_ID_LEN]) { }
 #endif
 
 void amdgpu_register_gpu_instance(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index b7f8f2ff143d..78441d5f3231 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -1551,4 +1551,35 @@ void amdgpu_choose_low_power_state(struct amdgpu_device 
*adev)
                adev->in_s3 = true;
 }
 
+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;
+}
+
+int amdgpu_acpi_get_isp4_dev_hid(u8 (*hid)[ACPI_ID_LEN])
+{
+       struct acpi_device *acpi_pdev;
+       struct device *pdev;
+
+       pdev = bus_find_device(&platform_bus_type, NULL, isp_sensor_ids,
+                              isp_match_acpi_device_ids);
+       if (!pdev)
+               return -EINVAL;
+
+       acpi_pdev = ACPI_COMPANION(pdev);
+       if (!acpi_pdev)
+               return -ENODEV;
+
+       strscpy(*hid, acpi_device_hid(acpi_pdev));
+
+       put_device(pdev);
+
+       return 0;
+}
+
 #endif /* CONFIG_SUSPEND */
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..574880d67009 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 +40,45 @@ 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 int isp_v4_1_1_hw_init(struct amdgpu_isp *isp)
 {
        struct amdgpu_device *adev = isp->adev;
        int idx, int_idx, num_res, r;
+       u8 isp_dev_hid[ACPI_ID_LEN];
        u64 isp_base;
 
        if (adev->rmmio_size == 0 || adev->rmmio_size < 0x5289)
                return -EINVAL;
 
+       r = amdgpu_acpi_get_isp4_dev_hid(&isp_dev_hid);
+       if (r) {
+               drm_dbg(&adev->ddev, "Invalid isp platform detected (%d)", r);
+               /* allow GPU init to progress */
+               return 0;
+       }
+
+       /* add GPIO resources required for OMNI5C10 sensor */
+       if (!strcmp("OMNI5C10", isp_dev_hid)) {
+               gpiod_add_lookup_table(&isp_gpio_table);
+               gpiod_add_lookup_table(&isp_sensor_gpio_table);
+       }
+
        isp_base = adev->rmmio_base;
 
        isp->isp_cell = kcalloc(3, sizeof(struct mfd_cell), GFP_KERNEL);
-- 
2.43.0