sunxi: video: HDMI: Fix LCD clock divider

Currently we may end up with an LCD clock divider that differs from
the HDMI PHY clock divider if we can't exactly match the pixel clock.
Fix this by using DIV_ROUND_UP to calculate the divider.  This works
since the PLL is chosen such that the resulting pixel clock is
never higher than the requested pixel clock.

Fixes: 1feed358ed15 ("sunxi: video: HDMI: Fix clock setup")

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>

diff --git a/drivers/video/sunxi/sunxi_dw_hdmi.c b/drivers/video/sunxi/sunxi_dw_hdmi.c
index cec23295b5cb2069437b30ee731233e69ceddb14..66a319187c291854c6dc0633e7a1bf05485a1379 100644 (file)
--- a/drivers/video/sunxi/sunxi_dw_hdmi.c
+++ b/drivers/video/sunxi/sunxi_dw_hdmi.c
@@ -254,7 +254,7 @@ static void sunxi_dw_hdmi_lcdc_init(int mux, const struct display_timing *edid,
 {
        struct sunxi_ccm_reg * const ccm =
                (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
-       int div = clock_get_pll3() / edid->pixelclock.typ;
+       int div = DIV_ROUND_UP(clock_get_pll3(), edid->pixelclock.typ);
        struct sunxi_lcdc_reg *lcdc;
 
        if (mux == 0) {