drm/i915: Enable PAL and SECAM format and add the propery for SDVO-TV
Currently SDVO TV only support NTSC-M format. In this patch we introduce PAL and SECAM formats available and create seting-format property at init time. When user dynamically chose preferred format by xrandr command, it will refine all modelines provided by SDVO device, then instruct SDVO device to execute. At the same time the property is added for SDVO-TV so that the SDVO-TV mode can be changed by using xrandr. https://bugs.freedesktop.org/show_bug.cgi?id=22891Signed-off-by: NMa Ling <ling.ma@intel.com> review-by: NZhao Yakui <yakui.zhao@intel.com> Signed-off-by: NEric Anholt <eric@anholt.net>
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