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| author | Ian Abbott <abbotti@mev.co.uk> | 2014-07-03 14:46:39 +0100 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-08-26 15:36:51 +0300 |
| commit | 4d4e2c003bd6c6bdd85080bd096d54d5d251defa (patch) | |
| tree | 203fe72f2f30bc3524f5dc3ca64724e8b175d780 | |
| parent | 62795a0d81970bfdd5866ffd87160c670a6b344c (diff) | |
| download | linux-4d4e2c003bd6c6bdd85080bd096d54d5d251defa.tar.bz2 | |
video: da8xx-fb: preserve display width when changing HSYNC
When looking at this driver for a client, I noticed the code that
configures the HSYNC pulse clobbers the display width in the same
register. It only preserves the MS part of the width in bit 3 and zeros
the LS part of the width in bits 9 to 4. This doesn't matter during
initialization as the width is configured afterwards, but subsequent use
of the FBIPUT_HSYNC ioctl would clobber the width.
Preserve bits 9 to 0 of LCD_RASTER_TIMING_0_REG when configuring the
horizontal sync.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
| -rw-r--r-- | drivers/video/fbdev/da8xx-fb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c index 788f6b37fce7..10c876c95772 100644 --- a/drivers/video/fbdev/da8xx-fb.c +++ b/drivers/video/fbdev/da8xx-fb.c @@ -419,7 +419,7 @@ static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width, { u32 reg; - reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf; + reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0x3ff; reg |= (((back_porch-1) & 0xff) << 24) | (((front_porch-1) & 0xff) << 16) | (((pulse_width-1) & 0x3f) << 10); |