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HDMI: improve EDID parse.

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1. For some sink device, there is no available video mode
	   in EDID. hdmi driver will crash under such case.
	2. There are some video mode is not defined in EDID extend
	   block, so we need to check first block data.

Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
This commit is contained in:
Zheng Yang
2015-05-06 17:15:24 +08:00
parent 6f5f0b8243
commit 3848053c4a
1 changed files with 18 additions and 4 deletions
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22
drivers/video/rockchip/hdmi/rockchip-hdmi-lcdc.c
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@@ -508,10 +508,14 @@ static void hdmi_sort_modelist(struct hdmi_edid *edid, int feature)
}
}
fb_destroy_modelist(head);
edid->modelist = head_new;
edid->modelist.prev->next = &edid->modelist;
edid->modelist.next->prev = &edid->modelist;
if (head_new.next == &head_new) {
pr_info("There is no available video mode in EDID.\n");
INIT_LIST_HEAD(&edid->modelist);
} else {
edid->modelist = head_new;
edid->modelist.prev->next = &edid->modelist;
edid->modelist.next->prev = &edid->modelist;
}
}
/**
@@ -585,6 +589,16 @@ int hdmi_ouputmode_select(struct hdmi *hdmi, int edid_ok)
hdmi_add_videomode(mode, head);
}
} else {
/* There are some video mode is not defined in EDID extend
block, so we need to check first block data.*/
if (specs && specs->modedb_len) {
for (i = 0; i < specs->modedb_len; i++) {
modedb = &specs->modedb[0];
pixclock = hdmi_videomode_to_vic(modedb);
if (pixclock)
hdmi_add_vic(pixclock, head);
}
}
hdmi_sort_modelist(&hdmi->edid, hdmi->property->feature);
}
hdmi_show_sink_info(hdmi);