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bcm2708_fb : Implement the FBIOBLANK ioctl using the mailbox property in... #655

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Merged
merged 1 commit into from
Aug 6, 2014
Merged

bcm2708_fb : Implement the FBIOBLANK ioctl using the mailbox property in... #655

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34 changes: 30 additions & 4 deletions drivers/video/fbdev/bcm2708_fb.c
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Original file line number Diff line number Diff line change
Expand Up @@ -57,8 +57,7 @@ static int fbswap = 0; /* module parameter */
static u32 dma_busy_wait_threshold = 1<<15;
module_param(dma_busy_wait_threshold, int, 0644);
MODULE_PARM_DESC(dma_busy_wait_threshold, "Busy-wait for DMA completion below this area");

/* this data structure describes each frame buffer device we find */
#include <mach/vcio.h>

struct fbinfo_s {
u32 xres, yres, xres_virtual, yres_virtual;
Expand Down Expand Up @@ -375,11 +374,38 @@ static int bcm2708_fb_setcolreg(unsigned int regno, unsigned int red,
}
return regno > 255;
}
/* tag part of the message */
struct vc_msg_tag {
uint32_t tag_id; /* the message id */
uint32_t buffer_size; /* size of the buffer (which in this case is always 4 bytes) */
uint32_t data_size; /* amount of data being sent or received */
uint32_t blank_mode; /* the ID of the clock/voltage to get or set */
uint32_t reserved; /* the value (e.g. rate (in Hz)) to set */
};

/* message structure to be sent to videocore */
struct vc_msg {
uint32_t size; /* simply, sizeof(struct vc_msg) */
uint32_t unused; /* unused in the blankscreen message */
struct vc_msg_tag tag; /* the tag structure above to make */
uint32_t end_tag; /* an end identifier, should be set to NULL */
};
static int bcm2708_fb_blank(int blank_mode, struct fb_info *info)
{
/*print_debug("bcm2708_fb_blank\n"); */
return -1;
int result;
struct vc_msg msg;
pr_info("bcm2708_fb_blank blank_mode=%d\n",blank_mode);
memset(&msg, 0, sizeof msg);
msg.tag.tag_id = VCMSG_SET_BLANK_SCREEN;
msg.size = sizeof msg;
msg.tag.buffer_size = 4;
msg.tag.data_size = 4;
msg.tag.blank_mode = blank_mode ;
// send the message
result = bcm_mailbox_property(&msg, sizeof msg);
pr_info("bcm2708_fb_blank result=%d msg.tag.blank_mode=%d\n",result,msg.tag.blank_mode);
return result;

}

static void bcm2708_fb_fillrect(struct fb_info *info,
Expand Down