drm/amdgpu: Fix GPU reset error.

Problem:
During GU reset PSP's sysfs was being wrongly reinitilized
during call to amdgpu_device_ip_late_init which was failing
with duplicate error.
Fix:
Move psp_sysfs_init to psp_sw_init to avoid this. Add guards
in sysfs file's read and write hook agains premature call
if PSP is not finished initialization.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 3836acc..6d9b05e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -117,16 +117,6 @@ static int psp_early_init(void *handle)
        return 0;
 }
 
-static int psp_late_init(void *handle)
-{
-       struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
-       if (adev->asic_type == CHIP_NAVI10)
-               return psp_sysfs_init(adev);
-
-       return 0;
-}
-
 static int psp_sw_init(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -150,6 +140,13 @@ static int psp_sw_init(void *handle)
                return ret;
        }
 
+       if (adev->asic_type == CHIP_NAVI10) {
+               ret= psp_sysfs_init(adev);
+               if (ret) {
+                       return ret;
+               }
+       }
+
        return 0;
 }
 
@@ -1843,6 +1840,11 @@ static ssize_t psp_usbc_pd_fw_sysfs_read(struct device *dev,
        uint32_t fw_ver;
        int ret;
 
+       if (!adev->ip_blocks[AMD_IP_BLOCK_TYPE_PSP].status.late_initialized) {
+               DRM_INFO("PSP block is not ready yet.");
+               return -EBUSY;
+       }
+
        mutex_lock(&adev->psp.mutex);
        ret = psp_read_usbc_pd_fw(&adev->psp, &fw_ver);
        mutex_unlock(&adev->psp.mutex);
@@ -1868,6 +1870,10 @@ static ssize_t psp_usbc_pd_fw_sysfs_write(struct device *dev,
        char fw_name[100];
        const struct firmware *usbc_pd_fw;
 
+       if (!adev->ip_blocks[AMD_IP_BLOCK_TYPE_PSP].status.late_initialized) {
+               DRM_INFO("PSP block is not ready yet.");
+               return -EBUSY;
+       }
 
        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s", buf);
        ret = request_firmware(&usbc_pd_fw, fw_name, adev->dev);
@@ -1919,7 +1925,7 @@ static DEVICE_ATTR(usbc_pd_fw, S_IRUGO | S_IWUSR,
 const struct amd_ip_funcs psp_ip_funcs = {
        .name = "psp",
        .early_init = psp_early_init,
-       .late_init = psp_late_init,
+       .late_init = NULL,
        .sw_init = psp_sw_init,
        .sw_fini = psp_sw_fini,
        .hw_init = psp_hw_init,