drm/i915/dsi: Add vblank calculation for command mode
Transcoder timing calculation differ for command mode. v2: Use is_vid_mode, and use same I915_WRITE (Jani) v3: Adjust the calculations to reflect dsc compression ratio v4: Rearrange the vertical and horizontal timing calc, optimize local variables usage. (Jani) v5: Fix the values used for calculation, use afe_clk for byte clock calculation, use intel_de_write/read (Jani) Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200312053841.2794-3-vandita.kulkarni@intel.com
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