From ab2a2be988b571bf6b96bb00b6edf122c1cf9ddc Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 2 Aug 2015 17:38:43 +0200 Subject: [PATCH] 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 Acked-by: Ian Campbell --- drivers/video/sunxi_display.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 3942d2f8ce..fa4241ef58 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); -- 2.25.1