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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-12-14 17:37:51 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-07-13 08:38:19 +0200 |
| commit | 70007036a5e65247b7e9ccfa1fe6763e8e94d21d (patch) | |
| tree | 249186893183d410441dc125ec10d3c794ccc789 /include/video | |
| parent | c76bfc96384333830d0301fb2e5e4ba557ceaac4 (diff) | |
| download | barebox-70007036a5e65247b7e9ccfa1fe6763e8e94d21d.tar.gz barebox-70007036a5e65247b7e9ccfa1fe6763e8e94d21d.tar.xz | |
video: Add Video Pipeline (VPL) support
Complex video pipelines are modelled with the of_graph bindings in
the devicetree. This patch adds a ioctl infrastructure to issue
commands to the remote endpoint of a of_graph. Currently defined
ioctls are prepare/unprepare, enable/disable and get_modes. This
is enough to control LVDS or HDMI encoder or simple panels.
A device node which contains of_graph endpoints can be registered
as a VPL entity. An entity can receive ioctls via the .ioctl callback
and also issue ioctls by calling vpl_ioctl. The core itself will never
iterate over the entire pipeline. Instead, the different VPL entities
should forward an ioctl to the next instance in the pipeline whenever
necessary.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include/video')
| -rw-r--r-- | include/video/vpl.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/include/video/vpl.h b/include/video/vpl.h new file mode 100644 index 0000000000..846007f4f5 --- /dev/null +++ b/include/video/vpl.h @@ -0,0 +1,46 @@ +#ifndef __VIDEO_VPL_H +#define __VIDEO_VPL_H + +#include <fb.h> + +#define VPL_PREPARE 0x67660001 +#define VPL_UNPREPARE 0x67660002 +#define VPL_ENABLE 0x67660003 +#define VPL_DISABLE 0x67660004 +#define VPL_GET_VIDEOMODES 0x67660005 + +struct vpl { + int (*ioctl)(struct vpl *, unsigned int port, + unsigned int cmd, void *ptr); + struct device_node *node; + struct list_head list; +}; + +int vpl_register(struct vpl *); +int vpl_ioctl(struct vpl *, unsigned int port, + unsigned int cmd, void *ptr); + +struct vpl *of_vpl_get(struct device_node *node, int port); + +static inline int vpl_ioctl_prepare(struct vpl *vpl, unsigned int port, + struct fb_videomode *mode) +{ + return vpl_ioctl(vpl, port, VPL_PREPARE, mode); +} + +static inline int vpl_ioctl_unprepare(struct vpl *vpl, unsigned int port) +{ + return vpl_ioctl(vpl, port, VPL_UNPREPARE, NULL); +} + +static inline int vpl_ioctl_enable(struct vpl *vpl, unsigned int port) +{ + return vpl_ioctl(vpl, port, VPL_ENABLE, NULL); +} + +static inline int vpl_ioctl_disable(struct vpl *vpl, unsigned int port) +{ + return vpl_ioctl(vpl, port, VPL_DISABLE, NULL); +} + +#endif /* __VIDEO_VPL_H */ |