drm/radeon/kms: add query for crtc hw id from crtc id to get info V2

Userspace need to know the hw crtc id (0, 1, 2, ...) from the drm
crtc id. Bump the minor version so userspace can enable conditionaly
features depend on this.

V2 use num_crtc and avoid DRM_ERROR

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index d3657dcfdd26..021572a3dd9c 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -98,11 +98,15 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 {
         struct radeon_device *rdev = dev->dev_private;
         struct drm_radeon_info *info;
+        struct radeon_mode_info *minfo = &rdev->mode_info;
         uint32_t *value_ptr;
         uint32_t value;
+        struct drm_crtc *crtc;
+        int i, found;
 
         info = data;
         value_ptr = (uint32_t *)((unsigned long)info->value);
+        value = *value_ptr;
         switch (info->request) {
         case RADEON_INFO_DEVICE_ID:
                 value = dev->pci_device;
@@ -116,6 +120,20 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
         case RADEON_INFO_ACCEL_WORKING:
                 value = rdev->accel_working;
                 break;
+        case RADEON_INFO_CRTC_FROM_ID:
+                for (i = 0, found = 0; i < rdev->num_crtc; i++) {
+                        crtc = (struct drm_crtc *)minfo->crtcs[i];
+                        if (crtc && crtc->base.id == value) {
+                                value = i;
+                                found = 1;
+                                break;
+                        }
+                }
+                if (!found) {
+                        DRM_DEBUG("unknown crtc id %d\n", value);
+                        return -EINVAL;
+                }
+                break;
         default:
                 DRM_DEBUG("Invalid request %d\n", info->request);
                 return -EINVAL;