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[media] solo6x10: Reduce OSD writes to the minimum necessary

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Instead of unconditionally writing SOLO_EOSD_EXT_SIZE() bytes to the OSD
area (which is 64 or 128 kB depending on the PCI board) we only
write the actual amount of data needed which is 16 * OSD_TEXT_MAX (= 16 * 44).

Signed-off-by: Ismael Luceno <ismael.luceno@corp.bluecherry.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Ismael Luceno 2014-05-18 16:44:11 -03:00 committed by Mauro Carvalho Chehab
parent 85ac1a1772
commit 3a4d339fe8
2 changed files with 16 additions and 17 deletions
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31
drivers/staging/media/solo6x10/solo6x10-enc.c
View File

@ -134,51 +134,48 @@ static void solo_capture_config(struct solo_dev *solo_dev)
kfree(buf);
}
#define SOLO_OSD_WRITE_SIZE (16 * OSD_TEXT_MAX)
/* Should be called with enable_lock held */
int solo_osd_print(struct solo_enc_dev *solo_enc)
{
struct solo_dev *solo_dev = solo_enc->solo_dev;
unsigned char *str = solo_enc->osd_text;
u8 *buf = solo_enc->osd_buf;
u32 reg = solo_reg_read(solo_dev, SOLO_VE_OSD_CH);
u32 reg;
const struct font_desc *vga = find_font("VGA8x16");
const unsigned char *vga_data;
int len;
int i, j;
if (WARN_ON_ONCE(!vga))
return -ENODEV;
len = strlen(str);
if (len == 0) {
reg = solo_reg_read(solo_dev, SOLO_VE_OSD_CH);
if (!*str) {
/* Disable OSD on this channel */
reg &= ~(1 << solo_enc->ch);
solo_reg_write(solo_dev, SOLO_VE_OSD_CH, reg);
return 0;
goto out;
}
memset(buf, 0, SOLO_EOSD_EXT_SIZE_MAX);
memset(buf, 0, SOLO_OSD_WRITE_SIZE);
vga_data = (const unsigned char *)vga->data;
for (i = 0; i < len; i++) {
unsigned char c = str[i];
for (i = 0; *str; i++, str++) {
for (j = 0; j < 16; j++) {
buf[(j * 2) + (i % 2) + (i / 2 * 32)] =
bitrev8(vga_data[(c * 16) + j]);
buf[(j << 1) | (i & 1) | ((i & ~1) << 4)] =
bitrev8(vga_data[(*str << 4) | j]);
}
}
solo_p2m_dma(solo_dev, 1, buf,
SOLO_EOSD_EXT_ADDR +
(solo_enc->ch * SOLO_EOSD_EXT_SIZE(solo_dev)),
SOLO_EOSD_EXT_SIZE(solo_dev), 0, 0);
SOLO_EOSD_EXT_ADDR_CHAN(solo_dev, solo_enc->ch),
SOLO_OSD_WRITE_SIZE, 0, 0);
/* Enable OSD on this channel */
reg |= (1 << solo_enc->ch);
solo_reg_write(solo_dev, SOLO_VE_OSD_CH, reg);
out:
solo_reg_write(solo_dev, SOLO_VE_OSD_CH, reg);
return 0;
}

2
drivers/staging/media/solo6x10/solo6x10-offsets.h
View File

@ -35,6 +35,8 @@
#define SOLO_EOSD_EXT_SIZE_MAX 0x20000
#define SOLO_EOSD_EXT_AREA(__solo) \
(SOLO_EOSD_EXT_SIZE(__solo) * 32)
#define SOLO_EOSD_EXT_ADDR_CHAN(__solo, ch) \
(SOLO_EOSD_EXT_ADDR + SOLO_EOSD_EXT_SIZE(__solo) * (ch))
#define SOLO_MOTION_EXT_ADDR(__solo) \
(SOLO_EOSD_EXT_ADDR + SOLO_EOSD_EXT_AREA(__solo))