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drm: add DRM_CAPs for cursor size

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Some hardware may not support standard 64x64 cursors.  Add
a drm cap to query the cursor size from the kernel.  Some examples
include radeon CIK parts (128x128 cursors) and armada (32x64 or 64x32).
This allows things like device specific ddxes to remove asics specific
logic and also allows xf86-video-modesetting to work properly with hw
cursors on this hardware. Default to 64 if the driver doesn't specify
a size.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Alex Deucher 2014-02-12 12:48:23 -05:00
parent 7d5a33b071
commit 8716ed4e7b
3 changed files with 17 additions and 0 deletions
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12
drivers/gpu/drm/drm_ioctl.c
View file

@ -296,6 +296,18 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
case DRM_CAP_ASYNC_PAGE_FLIP:
req->value = dev->mode_config.async_page_flip;
break;
case DRM_CAP_CURSOR_WIDTH:
if (dev->mode_config.cursor_width)
req->value = dev->mode_config.cursor_width;
else
req->value = 64;
break;
case DRM_CAP_CURSOR_HEIGHT:
if (dev->mode_config.cursor_height)
req->value = dev->mode_config.cursor_height;
else
req->value = 64;
break;
default:
return -EINVAL;
}

3
include/drm/drm_crtc.h
View file

@ -907,6 +907,9 @@ struct drm_mode_config {
/* whether async page flip is supported or not */
bool async_page_flip;
/* cursor size */
uint32_t cursor_width, cursor_height;
};
#define obj_to_crtc(x) container_of(x, struct drm_crtc, base)

2
include/uapi/drm/drm.h
View file

@ -619,6 +619,8 @@ struct drm_gem_open {
#define DRM_PRIME_CAP_EXPORT 0x2
#define DRM_CAP_TIMESTAMP_MONOTONIC 0x6
#define DRM_CAP_ASYNC_PAGE_FLIP 0x7
#define DRM_CAP_CURSOR_WIDTH 0x8
#define DRM_CAP_CURSOR_HEIGHT 0x9
/** DRM_IOCTL_GET_CAP ioctl argument type */
struct drm_get_cap {