[PATCH] drm: Allow CAP_PRIME on !MODESET

[Daniel Vetter]

vgem (and our igt tests using vgem) need this. I suspect etnaviv will
fare similarly.

Fixes: d5264ed3823a ("drm: Return -ENOTSUPP when called for KMS cap with a non-KMS driver")
Cc: Michel Dänzer <michel.daenzer at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/drm_ioctl.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 0a900bd4575d..60bf95644739 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -234,10 +234,15 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
 
 	req->value = 0;
 
-	/* Only one cap makes sense with a UMS driver: */
-	if (req->capability == DRM_CAP_TIMESTAMP_MONOTONIC) {
+	/* Only some caps make sense with UMS/render-only drivers. */
+	switch (req->capability) ) {
+	case DRM_CAP_TIMESTAMP_MONOTONIC:
 		req->value = drm_timestamp_monotonic;
 		return 0;
+	case DRM_CAP_PRIME:
+		req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
+		req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
+		return 0;
 	}
 
 	/* Other caps only work with KMS drivers */
@@ -258,10 +263,6 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
 	case DRM_CAP_DUMB_PREFER_SHADOW:
 		req->value = dev->mode_config.prefer_shadow;
 		break;
-	case DRM_CAP_PRIME:
-		req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
-		req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
-		break;
 	case DRM_CAP_ASYNC_PAGE_FLIP:
 		req->value = dev->mode_config.async_page_flip;
 		break;
-- 
2.10.2