diff options
| author | Damian <dhobsong@igel.co.jp> | 2011-05-18 11:10:07 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-05-23 16:06:24 +0900 |
| commit | 7caa4342ca5b37d2d178b464c16badd4228b3b7b (patch) | |
| tree | 0111e05278facfc0eb92c46b80c577d1e1e694e4 /drivers/video/sh_mobile_meram.h | |
| parent | 71a8638480eb8fb6cfabe2ee9ca3fbc6e3453a14 (diff) | |
sh_mobile_meram: MERAM framework for LCDC
Based on the patch by Takanari Hayama <taki@igel.co.jp>
Adds support framework necessary to use Media RAM (MERAM)
caching functionality with the LCDC. The MERAM is accessed
through up to 4 Interconnect Buffers (ICBs).
ICB numbers and MERAM address ranges to use are specified in
by filling in the .meram_cfg member of the LCDC platform data
Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/video/sh_mobile_meram.h')
| -rw-r--r-- | drivers/video/sh_mobile_meram.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/video/sh_mobile_meram.h b/drivers/video/sh_mobile_meram.h new file mode 100644 index 000000000000..82c54fbce8bd --- /dev/null +++ b/drivers/video/sh_mobile_meram.h @@ -0,0 +1,41 @@ +#ifndef __sh_mobile_meram_h__ +#define __sh_mobile_meram_h__ + +#include <linux/mutex.h> +#include <video/sh_mobile_meram.h> + +/* + * MERAM private + */ + +#define MERAM_ICB_Y 0x1 +#define MERAM_ICB_C 0x2 + +/* MERAM cache size */ +#define SH_MOBILE_MERAM_ICB_NUM 32 + +#define SH_MOBILE_MERAM_CACHE_OFFSET(p) ((p) >> 16) +#define SH_MOBILE_MERAM_CACHE_SIZE(p) ((p) & 0xffff) + +struct sh_mobile_meram_priv { + void __iomem *base; + struct mutex lock; + unsigned long used_icb; + int used_meram_cache_regions; + unsigned long used_meram_cache[SH_MOBILE_MERAM_ICB_NUM]; +}; + +int sh_mobile_meram_alloc_icb(const struct sh_mobile_meram_cfg *cfg, + int xres, + int yres, + unsigned int base_addr, + int yuv_mode, + int *marker_icb, + int *out_pitch); + +void sh_mobile_meram_free_icb(int marker_icb); + +#define SH_MOBILE_MERAM_START(ind, ab) \ + (0xC0000000 | ((ab & 0x1) << 23) | ((ind & 0x1F) << 24)) + +#endif /* !__sh_mobile_meram_h__ */ |