drm/i915: Explain the magic numbers for AUX SYNC/precharge length
[ Upstream commit 26bfc3f3 ] Replace the hardcoded final numbers in the AUX SYNC/precharge setup, and derive those from numbers from the (e)DP specs. The new functions can serve as the single point of truth for the number of SYNC pulses we use. Cc: Jouni Högander <jouni.hogander@intel.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230329172434.18744-2-ville.syrjala@linux.intel.com Reviewed-by: Jouni Högander <jouni.hogander@intel.com> Stable-dep-of: 2d6f2f79 ("drm/i915: Use 18 fast wake AUX sync len") Signed-off-by: Sasha Levin <sashal@kernel.org>
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