diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-09-03 07:20:23 +0000 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-09-14 17:23:21 +0900 |
| commit | 6de9edd5bde0cdfea12e9948690e53ec669c3018 (patch) | |
| tree | 638602a3d7726b27ae6ab85ef45f4f11c38c0283 /drivers/video/sh_mobile_lcdcfb.h | |
| parent | 89712699d7bc9cc93602407e0e9bc2490b771400 (diff) | |
| download | linux-6de9edd5bde0cdfea12e9948690e53ec669c3018.tar.bz2 | |
fbdev: sh_mobile_hdmi: implement locking
The SH-Mobile HDMI driver runs in several contexts: ISR, delayed work-queue,
task context, when called from the sh_mobile_lcdc framebuffer driver. This
creates ample race possibilities. Even though most these races are purely
theoretical, it is better to close them. To trace fb_info validity we install a
notification callback in the HDMI driver, and the only way for it to get to
driver internal data is by using struct sh_mobile_lcdc_chan, therefore it had
to be extracted into a separate common header.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/video/sh_mobile_lcdcfb.h')
| -rw-r--r-- | drivers/video/sh_mobile_lcdcfb.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/video/sh_mobile_lcdcfb.h b/drivers/video/sh_mobile_lcdcfb.h new file mode 100644 index 000000000000..6fcfc0ffe3f8 --- /dev/null +++ b/drivers/video/sh_mobile_lcdcfb.h @@ -0,0 +1,37 @@ +#ifndef SH_MOBILE_LCDCFB_H +#define SH_MOBILE_LCDCFB_H + +#include <linux/completion.h> +#include <linux/fb.h> +#include <linux/wait.h> + +/* per-channel registers */ +enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R, + LDSM2R, LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR, + LDHAJR, + NR_CH_REGS }; + +#define PALETTE_NR 16 + +struct sh_mobile_lcdc_priv; +struct fb_info; + +struct sh_mobile_lcdc_chan { + struct sh_mobile_lcdc_priv *lcdc; + unsigned long *reg_offs; + unsigned long ldmt1r_value; + unsigned long enabled; /* ME and SE in LDCNT2R */ + struct sh_mobile_lcdc_chan_cfg cfg; + u32 pseudo_palette[PALETTE_NR]; + unsigned long saved_ch_regs[NR_CH_REGS]; + struct fb_info *info; + dma_addr_t dma_handle; + struct fb_deferred_io defio; + struct scatterlist *sglist; + unsigned long frame_end; + unsigned long pan_offset; + wait_queue_head_t frame_end_wait; + struct completion vsync_completion; +}; + +#endif |