From 3e780af127282e5e24fa737a5b56d7c4523a72c9 Mon Sep 17 00:00:00 2001 From: Jeroen Hofstee Date: Tue, 14 Oct 2014 20:37:15 +0200 Subject: [PATCH] video: ipu_disp: remove pixclk fixup The ipu display insists on having a lower_margin smaller then 2. If this is not the case it will attempt to force it and adjust the pixclk accordingly. This multiplies pixclk in Hz with the width and height, since this is typically a * 10^7 * b * 10^2 * c * 10^2 this will overflow the uint_32 and make things even worse. Since this is a bootloader and the adjustment is neglectible, just force it to two and warn about it. Cc: Stefano Babic Signed-off-by: Jeroen Hofstee --- drivers/video/ipu_disp.c | 31 ++++++------------------------- 1 file changed, 6 insertions(+), 25 deletions(-) diff --git a/drivers/video/ipu_disp.c b/drivers/video/ipu_disp.c index e97a20468b..48fee992a1 100644 --- a/drivers/video/ipu_disp.c +++ b/drivers/video/ipu_disp.c @@ -801,28 +801,6 @@ int ipu_pixfmt_to_map(uint32_t fmt) return -1; } -/* - * This function is called to adapt synchronous LCD panel to IPU restriction. - */ -void adapt_panel_to_ipu_restricitions(uint32_t *pixel_clk, - uint16_t width, uint16_t height, - uint16_t h_start_width, - uint16_t h_end_width, - uint16_t v_start_width, - uint16_t *v_end_width) -{ - if (*v_end_width < 2) { - uint16_t total_width = width + h_start_width + h_end_width; - uint16_t total_height_old = height + v_start_width + - (*v_end_width); - uint16_t total_height_new = height + v_start_width + 2; - *v_end_width = 2; - *pixel_clk = (*pixel_clk) * total_width * total_height_new / - (total_width * total_height_old); - printf("WARNING: adapt panel end blank lines\n"); - } -} - /* * This function is called to initialize a synchronous LCD panel. * @@ -880,9 +858,12 @@ int32_t ipu_init_sync_panel(int disp, uint32_t pixel_clk, if ((v_sync_width == 0) || (h_sync_width == 0)) return -EINVAL; - adapt_panel_to_ipu_restricitions(&pixel_clk, width, height, - h_start_width, h_end_width, - v_start_width, &v_end_width); + /* adapt panel to ipu restricitions */ + if (v_end_width < 2) { + v_end_width = 2; + puts("WARNING: v_end_width (lower_margin) must be >= 2, adjusted\n"); + } + h_total = width + h_sync_width + h_start_width + h_end_width; v_total = height + v_sync_width + v_start_width + v_end_width; -- 2.25.1