32 lines
936 B
Diff
32 lines
936 B
Diff
From: Mans Rullgard <mans@mansr.com>
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Date: Mon, 7 Jul 2008 23:59:08 +0000 (+0100)
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Subject: omapfb: ensure fck/lcd < 173MHz
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X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=0523ece1bad659c48c66aea364d83f7490e7e5ae
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omapfb: ensure fck/lcd < 173MHz
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---
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diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c
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index c17371c..85d6cad 100644
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--- a/drivers/video/omap/dispc.c
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+++ b/drivers/video/omap/dispc.c
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@@ -738,14 +738,16 @@ static void setup_color_conv_coef(void)
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MOD_REG_FLD(at2_reg, (1 << 11), ct->full_range);
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}
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+#define MAX_FCK_LCD 173000000
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+
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static void calc_ck_div(int is_tft, int pck, int *lck_div, int *pck_div)
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{
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unsigned long fck, lck;
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- *lck_div = 1;
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pck = max(1, pck);
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fck = clk_get_rate(dispc.dss1_fck);
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- lck = fck;
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+ *lck_div = (fck + MAX_FCK_LCD - 1) / MAX_FCK_LCD;
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+ lck = fck / *lck_div;
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*pck_div = (lck + pck - 1) / pck;
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if (is_tft)
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*pck_div = max(2, *pck_div);
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