From 3a4d339fe8803a7e7d901f61ea268af71d899169 Mon Sep 17 00:00:00 2001 From: Ismael Luceno Date: Sun, 18 May 2014 16:44:11 -0300 Subject: [PATCH] [media] solo6x10: Reduce OSD writes to the minimum necessary 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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/solo6x10/solo6x10-enc.c | 31 +++++++++---------- .../staging/media/solo6x10/solo6x10-offsets.h | 2 ++ 2 files changed, 16 insertions(+), 17 deletions(-) diff --git a/drivers/staging/media/solo6x10/solo6x10-enc.c b/drivers/staging/media/solo6x10/solo6x10-enc.c index 94d5735abf85..2db53b68c62f 100644 --- a/drivers/staging/media/solo6x10/solo6x10-enc.c +++ b/drivers/staging/media/solo6x10/solo6x10-enc.c @@ -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; } diff --git a/drivers/staging/media/solo6x10/solo6x10-offsets.h b/drivers/staging/media/solo6x10/solo6x10-offsets.h index f005dca501f1..13eeb4470dcf 100644 --- a/drivers/staging/media/solo6x10/solo6x10-offsets.h +++ b/drivers/staging/media/solo6x10/solo6x10-offsets.h @@ -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))