iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

video: da8xx-fb: fixing timing off by one errors

Browse Source 
The LCD controller represents some of the timing fields with a 0
in the register representing 1.  This was not taken into account
when these registers were being set.  Interestingly enough not
all of the LCDC controller timing registers implement this representation
so carefully went through the technical reference manual to only "fix"
the correct timings.

Signed-off-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Darren Etheridge 2013-08-23 16:52:51 -05:00 committed by Tomi Valkeinen
parent a592d9fd63
commit 83edd73a9c
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/video/da8xx-fb.c
View File

@ -407,9 +407,9 @@ static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
u32 reg;
reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
reg |= ((back_porch & 0xff) << 24)
| ((front_porch & 0xff) << 16)
| ((pulse_width & 0x3f) << 10);
reg |= (((back_porch-1) & 0xff) << 24)
| (((front_porch-1) & 0xff) << 16)
| (((pulse_width-1) & 0x3f) << 10);
lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
}
@ -421,7 +421,7 @@ static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
reg |= ((back_porch & 0xff) << 24)
| ((front_porch & 0xff) << 16)
| ((pulse_width & 0x3f) << 10);
| (((pulse_width-1) & 0x3f) << 10);
lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
}