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fbdev: sh_mobile_hdmi: add support for more precise HDMI clock configuration

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The HDMI clock has to be reconfigured for different video modes. However, the
precision of the supplying SoC clock on SH-Mobile systems is often
insufficient. This patch allows to additionally reconfigure the parent clock
to achieve the optimal HDMI clock frequency, in case this is supported by the
platform.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Guennadi Liakhovetski
2010-11-02 11:27:16 +00:00
committed by Paul Mundt
parent 5fd284e6cd
commit c36940e678
2 changed files with 71 additions and 44 deletions
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3
include/video/sh_mobile_hdmi.h
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@@ -13,6 +13,7 @@
struct sh_mobile_lcdc_chan_cfg;
struct device;
struct clk;
/*
* flags format
@@ -33,6 +34,8 @@ struct sh_mobile_hdmi_info {
struct sh_mobile_lcdc_chan_cfg *lcd_chan;
struct device *lcd_dev;
unsigned int flags;
long (*clk_optimize_parent)(unsigned long target, unsigned long *best_freq,
unsigned long *parent_freq);
};
#endif