diff options
Diffstat (limited to 'drivers/video/omap2/dss/rfbi.c')
| -rw-r--r-- | drivers/video/omap2/dss/rfbi.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c index 0985f2fdd75f..46817e7fdaf4 100644 --- a/drivers/video/omap2/dss/rfbi.c +++ b/drivers/video/omap2/dss/rfbi.c @@ -32,6 +32,7 @@ #include <linux/ktime.h> #include <linux/hrtimer.h> #include <linux/seq_file.h> +#include <linux/semaphore.h> #include <video/omapdss.h> #include "dss.h" @@ -119,6 +120,8 @@ static struct { struct completion cmd_done; atomic_t cmd_fifo_full; atomic_t cmd_pending; + + struct semaphore bus_lock; } rfbi; struct update_region { @@ -146,6 +149,18 @@ static void rfbi_enable_clocks(bool enable) dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); } +void rfbi_bus_lock(void) +{ + down(&rfbi.bus_lock); +} +EXPORT_SYMBOL(rfbi_bus_lock); + +void rfbi_bus_unlock(void) +{ + up(&rfbi.bus_lock); +} +EXPORT_SYMBOL(rfbi_bus_unlock); + void omap_rfbi_write_command(const void *buf, u32 len) { rfbi_enable_clocks(1); @@ -1022,6 +1037,7 @@ static int omap_rfbihw_probe(struct platform_device *pdev) rfbi.pdev = pdev; spin_lock_init(&rfbi.cmd_lock); + sema_init(&rfbi.bus_lock, 1); init_completion(&rfbi.cmd_done); atomic_set(&rfbi.cmd_fifo_full, 0); |