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| author | Jingoo Han <jg1.han@samsung.com> | 2012-01-27 14:47:55 +0900 |
|---|---|---|
| committer | Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2012-01-28 20:58:11 +0000 |
| commit | d8b97db4c8e40e49985fa5802be914292add64f6 (patch) | |
| tree | fe9a4bfb7e6ecb58d96518d73000fca971873059 /drivers/video/s3c-fb.c | |
| parent | f7f31e505aa79d91b979a38789b1608744361bdc (diff) | |
| download | linux-d8b97db4c8e40e49985fa5802be914292add64f6.tar.gz linux-d8b97db4c8e40e49985fa5802be914292add64f6.tar.bz2 linux-d8b97db4c8e40e49985fa5802be914292add64f6.zip | |
video: s3c-fb: add video clock running at data under-flow
This patch adds video clock running at data under-flow.
It means that the pixel clock is continuously provided
to lcd module, even when under-run occurs.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/s3c-fb.c')
| -rw-r--r-- | drivers/video/s3c-fb.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c index 9af6c1849c24..e22bf9ddf287 100644 --- a/drivers/video/s3c-fb.c +++ b/drivers/video/s3c-fb.c @@ -84,6 +84,7 @@ struct s3c_fb; * @has_shadowcon: Set if has SHADOWCON register. * @has_blendcon: Set if has BLENDCON register. * @has_clksel: Set if VIDCON0 register has CLKSEL bit. + * @has_fixvclk: Set if VIDCON1 register has FIXVCLK bits. */ struct s3c_fb_variant { unsigned int is_2443:1; @@ -103,6 +104,7 @@ struct s3c_fb_variant { unsigned int has_shadowcon:1; unsigned int has_blendcon:1; unsigned int has_clksel:1; + unsigned int has_fixvclk:1; }; /** @@ -1358,6 +1360,7 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) struct resource *res; int win; int ret = 0; + u32 reg; platid = platform_get_device_id(pdev); fbdrv = (struct s3c_fb_driverdata *)platid->driver_data; @@ -1448,6 +1451,14 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) writel(pd->vidcon1, sfb->regs + VIDCON1); + /* set video clock running at under-run */ + if (sfb->variant.has_fixvclk) { + reg = readl(sfb->regs + VIDCON1); + reg &= ~VIDCON1_VCLK_MASK; + reg |= VIDCON1_VCLK_RUN; + writel(reg, sfb->regs + VIDCON1); + } + /* zero all windows before we do anything */ for (win = 0; win < fbdrv->variant.nr_windows; win++) @@ -1571,6 +1582,7 @@ static int s3c_fb_resume(struct device *dev) struct s3c_fb_platdata *pd = sfb->pdata; struct s3c_fb_win *win; int win_no; + u32 reg; clk_enable(sfb->bus_clk); @@ -1581,6 +1593,14 @@ static int s3c_fb_resume(struct device *dev) pd->setup_gpio(); writel(pd->vidcon1, sfb->regs + VIDCON1); + /* set video clock running at under-run */ + if (sfb->variant.has_fixvclk) { + reg = readl(sfb->regs + VIDCON1); + reg &= ~VIDCON1_VCLK_MASK; + reg |= VIDCON1_VCLK_RUN; + writel(reg, sfb->regs + VIDCON1); + } + /* zero all windows before we do anything */ for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++) s3c_fb_clear_win(sfb, win_no); @@ -1845,6 +1865,7 @@ static struct s3c_fb_driverdata s3c_fb_data_s5pv210 = { .has_shadowcon = 1, .has_blendcon = 1, .has_clksel = 1, + .has_fixvclk = 1, }, .win[0] = &s3c_fb_data_s5p_wins[0], .win[1] = &s3c_fb_data_s5p_wins[1], @@ -1876,6 +1897,7 @@ static struct s3c_fb_driverdata s3c_fb_data_exynos4 = { .has_shadowcon = 1, .has_blendcon = 1, + .has_fixvclk = 1, }, .win[0] = &s3c_fb_data_s5p_wins[0], .win[1] = &s3c_fb_data_s5p_wins[1], @@ -1941,6 +1963,7 @@ static struct s3c_fb_driverdata s3c_fb_data_s5p64x0 = { }, .has_blendcon = 1, + .has_fixvclk = 1, }, .win[0] = &s3c_fb_data_s5p_wins[0], .win[1] = &s3c_fb_data_s5p_wins[1], |