drm/amdgpu: Move VBIOS version to sysfs

sysfs is more stable, and doesn't require root to access

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 23 insertions, 31 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index da0a667a911b..1c5c44acaad2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -66,7 +66,6 @@ static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev);
 static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev);
 static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device *adev);
 static int amdgpu_debugfs_vbios_dump_init(struct amdgpu_device *adev);
-static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device *adev);
 
 static const char *amdgpu_asic_name[] = {
         "TAHITI",
@@ -889,6 +888,20 @@ static uint32_t cail_ioreg_read(struct card_info *info, uint32_t reg)
         return r;
 }
 
+static ssize_t amdgpu_atombios_get_vbios_version(struct device *dev,
+                                                 struct device_attribute *attr,
+                                                 char *buf)
+{
+        struct drm_device *ddev = dev_get_drvdata(dev);
+        struct amdgpu_device *adev = ddev->dev_private;
+        struct atom_context *ctx = adev->mode_info.atom_context;
+
+        return snprintf(buf, PAGE_SIZE, "%s\n", ctx->vbios_version);
+}
+
+static DEVICE_ATTR(vbios_version, 0444, amdgpu_atombios_get_vbios_version,
+                   NULL);
+
 /**
  * amdgpu_atombios_fini - free the driver info and callbacks for atombios
  *
@@ -908,6 +921,7 @@ static void amdgpu_atombios_fini(struct amdgpu_device *adev)
         adev->mode_info.atom_context = NULL;
         kfree(adev->mode_info.atom_card_info);
         adev->mode_info.atom_card_info = NULL;
+        device_remove_file(adev->dev, &dev_attr_vbios_version);
 }
 
 /**
@@ -924,6 +938,7 @@ static int amdgpu_atombios_init(struct amdgpu_device *adev)
 {
         struct card_info *atom_card_info =
             kzalloc(sizeof(struct card_info), GFP_KERNEL);
+        int ret;
 
         if (!atom_card_info)
                 return -ENOMEM;
@@ -960,6 +975,13 @@ static int amdgpu_atombios_init(struct amdgpu_device *adev)
                 amdgpu_atombios_scratch_regs_init(adev);
                 amdgpu_atombios_allocate_fb_scratch(adev);
         }
+
+        ret = device_create_file(adev->dev, &dev_attr_vbios_version);
+        if (ret) {
+                DRM_ERROR("Failed to create device file for VBIOS version\n");
+                return ret;
+        }
+
         return 0;
 }
 
@@ -2207,10 +2229,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
         if (r)
                 DRM_ERROR("Creating vbios dump debugfs failed (%d).\n", r);
 
-        r = amdgpu_debugfs_vbios_version_init(adev);
-        if (r)
-                DRM_ERROR("Creating vbios version debugfs failed (%d).\n", r);
-
         if ((amdgpu_testing & 1)) {
                 if (adev->accel_working)
                         amdgpu_test_moves(adev);
@@ -3775,39 +3793,17 @@ static int amdgpu_debugfs_get_vbios_dump(struct seq_file *m, void *data)
         return 0;
 }
 
-static int amdgpu_debugfs_get_vbios_version(struct seq_file *m, void *data)
-{
-        struct drm_info_node *node = (struct drm_info_node *) m->private;
-        struct drm_device *dev = node->minor->dev;
-        struct amdgpu_device *adev = dev->dev_private;
-        struct atom_context *ctx = adev->mode_info.atom_context;
-
-        seq_printf(m, "%s\n", ctx->vbios_version);
-        return 0;
-}
-
 static const struct drm_info_list amdgpu_vbios_dump_list[] = {
                 {"amdgpu_vbios",
                  amdgpu_debugfs_get_vbios_dump,
                  0, NULL},
 };
 
-static const struct drm_info_list amdgpu_vbios_version_list[] = {
-                {"amdgpu_vbios_version",
-                 amdgpu_debugfs_get_vbios_version,
-                 0, NULL},
-};
-
 static int amdgpu_debugfs_vbios_dump_init(struct amdgpu_device *adev)
 {
         return amdgpu_debugfs_add_files(adev,
                                         amdgpu_vbios_dump_list, 1);
 }
-static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device *adev)
-{
-        return amdgpu_debugfs_add_files(adev,
-                                        amdgpu_vbios_version_list, 1);
-}
 #else
 static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device *adev)
 {
@@ -3821,9 +3817,5 @@ static int amdgpu_debugfs_vbios_dump_init(struct amdgpu_device *adev)
 {
         return 0;
 }
-static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device *adev)
-{
-        return 0;
-}
 static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev) { }
 #endif