Commit 8cf5c917 authored by Jesse Barnes's avatar Jesse Barnes Committed by Dave Airlie
Browse files

drm: add plane support v3 



Planes are a bit like half-CRTCs.  They have a location and fb, but
don't drive outputs directly.  Add support for handling them to the core
KMS code.

v2: fix ABI of get_plane - move format_type_ptr to the end
v3: add 'flags' field for interlaced support (from Ville)

Acked-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
Reviewed-by: default avatarRob Clark <rob.clark@linaro.org>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent e08e96de

drivers/gpu/drm/drm_crtc.c

+255 −2
Original line number Diff line number Diff line
@@ -324,6 +324,7 @@ void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 
{

	struct drm_device *dev = fb->dev;

	struct drm_crtc *crtc;

	struct drm_plane *plane;

	struct drm_mode_set set;

	int ret;
@@ -340,6 +341,15 @@ void drm_framebuffer_cleanup(struct drm_framebuffer *fb) 
		}

	}



	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {

		if (plane->fb == fb) {

			/* should turn off the crtc */

			ret = plane->funcs->disable_plane(plane);

			if (ret)

				DRM_ERROR("failed to disable plane with busy fb\n");

		}

	}



	drm_mode_object_put(dev, &fb->base);

	list_del(&fb->head);

	dev->mode_config.num_fb--;
@@ -540,6 +550,50 @@ void drm_encoder_cleanup(struct drm_encoder *encoder) 
}

EXPORT_SYMBOL(drm_encoder_cleanup);



int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,

		   unsigned long possible_crtcs,

		   const struct drm_plane_funcs *funcs,

		   uint32_t *formats, uint32_t format_count)

{

	mutex_lock(&dev->mode_config.mutex);



	plane->dev = dev;

	drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);

	plane->funcs = funcs;

	plane->format_types = kmalloc(sizeof(uint32_t) * format_count,

				      GFP_KERNEL);

	if (!plane->format_types) {

		DRM_DEBUG_KMS("out of memory when allocating plane\n");

		drm_mode_object_put(dev, &plane->base);

		return -ENOMEM;

	}



	memcpy(plane->format_types, formats, format_count);

	plane->format_count = format_count;

	plane->possible_crtcs = possible_crtcs;



	list_add_tail(&plane->head, &dev->mode_config.plane_list);

	dev->mode_config.num_plane++;



	mutex_unlock(&dev->mode_config.mutex);



	return 0;

}

EXPORT_SYMBOL(drm_plane_init);



void drm_plane_cleanup(struct drm_plane *plane)

{

	struct drm_device *dev = plane->dev;



	mutex_lock(&dev->mode_config.mutex);

	kfree(plane->format_types);

	drm_mode_object_put(dev, &plane->base);

	list_del(&plane->head);

	dev->mode_config.num_plane--;

	mutex_unlock(&dev->mode_config.mutex);

}

EXPORT_SYMBOL(drm_plane_cleanup);



/**

 * drm_mode_create - create a new display mode

 * @dev: DRM device
@@ -871,6 +925,7 @@ void drm_mode_config_init(struct drm_device *dev) 
	INIT_LIST_HEAD(&dev->mode_config.encoder_list);

	INIT_LIST_HEAD(&dev->mode_config.property_list);

	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);

	INIT_LIST_HEAD(&dev->mode_config.plane_list);

	idr_init(&dev->mode_config.crtc_idr);



	mutex_lock(&dev->mode_config.mutex);
@@ -947,6 +1002,7 @@ void drm_mode_config_cleanup(struct drm_device *dev) 
	struct drm_encoder *encoder, *enct;

	struct drm_framebuffer *fb, *fbt;

	struct drm_property *property, *pt;

	struct drm_plane *plane, *plt;



	list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,

				 head) {
@@ -971,6 +1027,10 @@ void drm_mode_config_cleanup(struct drm_device *dev) 
		crtc->funcs->destroy(crtc);

	}



	list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,

				 head) {

		plane->funcs->destroy(plane);

	}

}

EXPORT_SYMBOL(drm_mode_config_cleanup);
@@ -1470,6 +1530,197 @@ out: 
	return ret;

}



/**

 * drm_mode_getplane_res - get plane info

 * @dev: DRM device

 * @data: ioctl data

 * @file_priv: DRM file info

 *

 * Return an plane count and set of IDs.

 */

int drm_mode_getplane_res(struct drm_device *dev, void *data,

			    struct drm_file *file_priv)

{

	struct drm_mode_get_plane_res *plane_resp = data;

	struct drm_mode_config *config;

	struct drm_plane *plane;

	uint32_t __user *plane_ptr;

	int copied = 0, ret = 0;



	if (!drm_core_check_feature(dev, DRIVER_MODESET))

		return -EINVAL;



	mutex_lock(&dev->mode_config.mutex);

	config = &dev->mode_config;



	/*

	 * This ioctl is called twice, once to determine how much space is

	 * needed, and the 2nd time to fill it.

	 */

	if (config->num_plane &&

	    (plane_resp->count_planes >= config->num_plane)) {

		plane_ptr = (uint32_t *)(unsigned long)plane_resp->plane_id_ptr;



		list_for_each_entry(plane, &config->plane_list, head) {

			if (put_user(plane->base.id, plane_ptr + copied)) {

				ret = -EFAULT;

				goto out;

			}

			copied++;

		}

	}

	plane_resp->count_planes = config->num_plane;



out:

	mutex_unlock(&dev->mode_config.mutex);

	return ret;

}



/**

 * drm_mode_getplane - get plane info

 * @dev: DRM device

 * @data: ioctl data

 * @file_priv: DRM file info

 *

 * Return plane info, including formats supported, gamma size, any

 * current fb, etc.

 */

int drm_mode_getplane(struct drm_device *dev, void *data,

			struct drm_file *file_priv)

{

	struct drm_mode_get_plane *plane_resp = data;

	struct drm_mode_object *obj;

	struct drm_plane *plane;

	uint32_t __user *format_ptr;

	int ret = 0;



	if (!drm_core_check_feature(dev, DRIVER_MODESET))

		return -EINVAL;



	mutex_lock(&dev->mode_config.mutex);

	obj = drm_mode_object_find(dev, plane_resp->plane_id,

				   DRM_MODE_OBJECT_PLANE);

	if (!obj) {

		ret = -ENOENT;

		goto out;

	}

	plane = obj_to_plane(obj);



	if (plane->crtc)

		plane_resp->crtc_id = plane->crtc->base.id;

	else

		plane_resp->crtc_id = 0;



	if (plane->fb)

		plane_resp->fb_id = plane->fb->base.id;

	else

		plane_resp->fb_id = 0;



	plane_resp->plane_id = plane->base.id;

	plane_resp->possible_crtcs = plane->possible_crtcs;

	plane_resp->gamma_size = plane->gamma_size;



	/*

	 * This ioctl is called twice, once to determine how much space is

	 * needed, and the 2nd time to fill it.

	 */

	if (plane->format_count &&

	    (plane_resp->count_format_types >= plane->format_count)) {

		format_ptr = (uint32_t *)(unsigned long)plane_resp->format_type_ptr;

		if (copy_to_user(format_ptr,

				 plane->format_types,

				 sizeof(uint32_t) * plane->format_count)) {

			ret = -EFAULT;

			goto out;

		}

	}

	plane_resp->count_format_types = plane->format_count;



out:

	mutex_unlock(&dev->mode_config.mutex);

	return ret;

}



/**

 * drm_mode_setplane - set up or tear down an plane

 * @dev: DRM device

 * @data: ioctl data*

 * @file_prive: DRM file info

 *

 * Set plane info, including placement, fb, scaling, and other factors.

 * Or pass a NULL fb to disable.

 */

int drm_mode_setplane(struct drm_device *dev, void *data,

			struct drm_file *file_priv)

{

	struct drm_mode_set_plane *plane_req = data;

	struct drm_mode_object *obj;

	struct drm_plane *plane;

	struct drm_crtc *crtc;

	struct drm_framebuffer *fb;

	int ret = 0;



	if (!drm_core_check_feature(dev, DRIVER_MODESET))

		return -EINVAL;



	mutex_lock(&dev->mode_config.mutex);



	/*

	 * First, find the plane, crtc, and fb objects.  If not available,

	 * we don't bother to call the driver.

	 */

	obj = drm_mode_object_find(dev, plane_req->plane_id,

				   DRM_MODE_OBJECT_PLANE);

	if (!obj) {

		DRM_DEBUG_KMS("Unknown plane ID %d\n",

			      plane_req->plane_id);

		ret = -ENOENT;

		goto out;

	}

	plane = obj_to_plane(obj);



	/* No fb means shut it down */

	if (!plane_req->fb_id) {

		plane->funcs->disable_plane(plane);

		goto out;

	}



	obj = drm_mode_object_find(dev, plane_req->crtc_id,

				   DRM_MODE_OBJECT_CRTC);

	if (!obj) {

		DRM_DEBUG_KMS("Unknown crtc ID %d\n",

			      plane_req->crtc_id);

		ret = -ENOENT;

		goto out;

	}

	crtc = obj_to_crtc(obj);



	obj = drm_mode_object_find(dev, plane_req->fb_id,

				   DRM_MODE_OBJECT_FB);

	if (!obj) {

		DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",

			      plane_req->fb_id);

		ret = -ENOENT;

		goto out;

	}

	fb = obj_to_fb(obj);



	ret = plane->funcs->update_plane(plane, crtc, fb,

					 plane_req->crtc_x, plane_req->crtc_y,

					 plane_req->crtc_w, plane_req->crtc_h,

					 plane_req->src_x, plane_req->src_y,

					 plane_req->src_w, plane_req->src_h);

	if (!ret) {

		plane->crtc = crtc;

		plane->fb = fb;

	}



out:

	mutex_unlock(&dev->mode_config.mutex);



	return ret;

}



/**

 * drm_mode_setcrtc - set CRTC configuration

 * @inode: inode from the ioctl
@@ -1693,11 +1944,13 @@ int drm_mode_addfb(struct drm_device *dev, 
		return -EINVAL;



	if ((config->min_width > r->width) || (r->width > config->max_width)) {

		DRM_ERROR("mode new framebuffer width not within limits\n");

		DRM_ERROR("bad framebuffer width %d, should be >= %d && <= %d\n",

			  r->width, config->min_width, config->max_width);

		return -EINVAL;

	}

	if ((config->min_height > r->height) || (r->height > config->max_height)) {

		DRM_ERROR("mode new framebuffer height not within limits\n");

		DRM_ERROR("bad framebuffer height %d, should be >= %d && <= %d\n",

			  r->height, config->min_height, config->max_height);

		return -EINVAL;

	}

drivers/gpu/drm/drm_drv.c

+3 −0
Original line number Diff line number Diff line
@@ -136,8 +136,11 @@ static struct drm_ioctl_desc drm_ioctls[] = { 
	DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),



	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),

	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),

include/drm/drm.h

+3 −0
Original line number Diff line number Diff line
@@ -714,6 +714,9 @@ struct drm_get_cap { 
#define DRM_IOCTL_MODE_CREATE_DUMB DRM_IOWR(0xB2, struct drm_mode_create_dumb)

#define DRM_IOCTL_MODE_MAP_DUMB    DRM_IOWR(0xB3, struct drm_mode_map_dumb)

#define DRM_IOCTL_MODE_DESTROY_DUMB    DRM_IOWR(0xB4, struct drm_mode_destroy_dumb)

#define DRM_IOCTL_MODE_GETPLANERESOURCES DRM_IOWR(0xB5, struct drm_mode_get_plane_res)

#define DRM_IOCTL_MODE_GETPLANE	DRM_IOWR(0xB6, struct drm_mode_get_plane)

#define DRM_IOCTL_MODE_SETPLANE	DRM_IOWR(0xB7, struct drm_mode_set_plane)



/**

 * Device specific ioctls should only be in their respective headers

include/drm/drm_crtc.h

+74 −1
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ struct drm_framebuffer; 
#define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0

#define DRM_MODE_OBJECT_FB 0xfbfbfbfb

#define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb

#define DRM_MODE_OBJECT_PLANE 0xeeeeeeee



struct drm_mode_object {

	uint32_t id;
@@ -278,6 +279,7 @@ struct drm_crtc; 
struct drm_connector;

struct drm_encoder;

struct drm_pending_vblank_event;

struct drm_plane;



/**

 * drm_crtc_funcs - control CRTCs for a given device
@@ -535,6 +537,62 @@ struct drm_connector { 
	int null_edid_counter; /* needed to workaround some HW bugs where we get all 0s */

};



/**

 * drm_plane_funcs - driver plane control functions

 * @update_plane: update the plane configuration

 * @disable_plane: shut down the plane

 * @destroy: clean up plane resources

 */

struct drm_plane_funcs {

	int (*update_plane)(struct drm_plane *plane,

			    struct drm_crtc *crtc, struct drm_framebuffer *fb,

			    int crtc_x, int crtc_y,

			    unsigned int crtc_w, unsigned int crtc_h,

			    uint32_t src_x, uint32_t src_y,

			    uint32_t src_w, uint32_t src_h);

	int (*disable_plane)(struct drm_plane *plane);

	void (*destroy)(struct drm_plane *plane);

};



/**

 * drm_plane - central DRM plane control structure

 * @dev: DRM device this plane belongs to

 * @head: for list management

 * @base: base mode object

 * @possible_crtcs: pipes this plane can be bound to

 * @format_types: array of formats supported by this plane

 * @format_count: number of formats supported

 * @crtc: currently bound CRTC

 * @fb: currently bound fb

 * @gamma_size: size of gamma table

 * @gamma_store: gamma correction table

 * @enabled: enabled flag

 * @funcs: helper functions

 * @helper_private: storage for drver layer

 */

struct drm_plane {

	struct drm_device *dev;

	struct list_head head;



	struct drm_mode_object base;



	uint32_t possible_crtcs;

	uint32_t *format_types;

	uint32_t format_count;



	struct drm_crtc *crtc;

	struct drm_framebuffer *fb;



	/* CRTC gamma size for reporting to userspace */

	uint32_t gamma_size;

	uint16_t *gamma_store;



	bool enabled;



	const struct drm_plane_funcs *funcs;

	void *helper_private;

};



/**

 * struct drm_mode_set

 *
@@ -589,6 +647,8 @@ struct drm_mode_config { 
	struct list_head connector_list;

	int num_encoder;

	struct list_head encoder_list;

	int num_plane;

	struct list_head plane_list;



	int num_crtc;

	struct list_head crtc_list;
@@ -641,6 +701,7 @@ struct drm_mode_config { 
#define obj_to_fb(x) container_of(x, struct drm_framebuffer, base)

#define obj_to_property(x) container_of(x, struct drm_property, base)

#define obj_to_blob(x) container_of(x, struct drm_property_blob, base)

#define obj_to_plane(x) container_of(x, struct drm_plane, base)





extern void drm_crtc_init(struct drm_device *dev,
@@ -660,6 +721,13 @@ extern void drm_encoder_init(struct drm_device *dev, 
			     const struct drm_encoder_funcs *funcs,

			     int encoder_type);



extern int drm_plane_init(struct drm_device *dev,

			  struct drm_plane *plane,

			  unsigned long possible_crtcs,

			  const struct drm_plane_funcs *funcs,

			  uint32_t *formats, uint32_t format_count);

extern void drm_plane_cleanup(struct drm_plane *plane);



extern void drm_encoder_cleanup(struct drm_encoder *encoder);



extern char *drm_get_connector_name(struct drm_connector *connector);
@@ -753,13 +821,18 @@ extern struct drm_mode_object *drm_mode_object_find(struct drm_device *dev, 
/* IOCTLs */

extern int drm_mode_getresources(struct drm_device *dev,

				 void *data, struct drm_file *file_priv);



extern int drm_mode_getplane_res(struct drm_device *dev, void *data,

				   struct drm_file *file_priv);

extern int drm_mode_getcrtc(struct drm_device *dev,

			    void *data, struct drm_file *file_priv);

extern int drm_mode_getconnector(struct drm_device *dev,

			      void *data, struct drm_file *file_priv);

extern int drm_mode_setcrtc(struct drm_device *dev,

			    void *data, struct drm_file *file_priv);

extern int drm_mode_getplane(struct drm_device *dev,

			       void *data, struct drm_file *file_priv);

extern int drm_mode_setplane(struct drm_device *dev,

			       void *data, struct drm_file *file_priv);

extern int drm_mode_cursor_ioctl(struct drm_device *dev,

				void *data, struct drm_file *file_priv);

extern int drm_mode_addfb(struct drm_device *dev,

include/drm/drm_mode.h

+42 −5
Original line number Diff line number Diff line
@@ -120,6 +120,43 @@ struct drm_mode_crtc { 
	struct drm_mode_modeinfo mode;

};



#define DRM_MODE_PRESENT_TOP_FIELD	(1<<0)

#define DRM_MODE_PRESENT_BOTTOM_FIELD	(1<<1)



/* Planes blend with or override other bits on the CRTC */

struct drm_mode_set_plane {

	__u32 plane_id;

	__u32 crtc_id;

	__u32 fb_id; /* fb object contains surface format type */

	__u32 flags; /* see above flags */



	/* Signed dest location allows it to be partially off screen */

	__s32 crtc_x, crtc_y;

	__u32 crtc_w, crtc_h;



	/* Source values are 16.16 fixed point */

	__u32 src_x, src_y;

	__u32 src_h, src_w;

};



struct drm_mode_get_plane {

	__u32 plane_id;



	__u32 crtc_id;

	__u32 fb_id;



	__u32 possible_crtcs;

	__u32 gamma_size;



	__u32 count_format_types;

	__u64 format_type_ptr;

};



struct drm_mode_get_plane_res {

	__u64 plane_id_ptr;

	__u32 count_planes;

};



#define DRM_MODE_ENCODER_NONE	0

#define DRM_MODE_ENCODER_DAC	1

#define DRM_MODE_ENCODER_TMDS	2

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