diff options
| author | Hans de Goede | 2015-08-02 17:38:43 +0200 |
|---|---|---|
| committer | Hans de Goede | 2015-08-08 16:26:20 +0200 |
| commit | ab2a2be988b571bf6b96bb00b6edf122c1cf9ddc (patch) | |
| tree | 9c91a42b40d75336380a9a6bba9e23a1955d0b35 /drivers/video/sunxi_display.c | |
| parent | bf689342a3b6c7dd9eb5a81fc9559cef84d9009a (diff) | |
sunxi: display: Correct clk_delay calculations for lcd displays
We should only subtract 2 from the vblank time when using tcon1.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'drivers/video/sunxi_display.c')
| -rw-r--r-- | drivers/video/sunxi_display.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 3942d2f8cea..fa4241ef580 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -663,11 +663,14 @@ static void sunxi_lcdc_backlight_enable(void) gpio_direction_output(pin, PWM_ON); } -static int sunxi_lcdc_get_clk_delay(const struct ctfb_res_modes *mode) +static int sunxi_lcdc_get_clk_delay(const struct ctfb_res_modes *mode, int tcon) { int delay; - delay = mode->lower_margin + mode->vsync_len + mode->upper_margin - 2; + delay = mode->lower_margin + mode->vsync_len + mode->upper_margin; + if (tcon == 1) + delay -= 2; + return (delay > 30) ? 30 : delay; } @@ -692,7 +695,7 @@ static void sunxi_lcdc_tcon0_mode_set(const struct ctfb_res_modes *mode, clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK, SUNXI_LCDC_CTRL_IO_MAP_TCON0); - clk_delay = sunxi_lcdc_get_clk_delay(mode); + clk_delay = sunxi_lcdc_get_clk_delay(mode, 0); writel(SUNXI_LCDC_TCON0_CTRL_ENABLE | SUNXI_LCDC_TCON0_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon0_ctrl); @@ -770,7 +773,7 @@ static void sunxi_lcdc_tcon1_mode_set(const struct ctfb_res_modes *mode, clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK, SUNXI_LCDC_CTRL_IO_MAP_TCON1); - clk_delay = sunxi_lcdc_get_clk_delay(mode); + clk_delay = sunxi_lcdc_get_clk_delay(mode, 1); writel(SUNXI_LCDC_TCON1_CTRL_ENABLE | SUNXI_LCDC_TCON1_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon1_ctrl); |