drm/i915/dp: Use consistent name for link bpp and compressed bpp

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Currently there are many places where we use output_bpp for link bpp and
compressed bpp.
Lets use consistent naming:
output_bpp : The intermediate value taking into account the
output_format chroma subsampling.
compressed_bpp : target bpp for the DSC encoder.
link_bpp : final bpp used in the link.

For 444 sampling without DSC:
link_bpp = output_bpp = pipe_bpp

For 420 sampling without DSC:
output_bpp = pipe_bpp / 2
link_bpp = output_bpp

For 444 sampling with DSC:
output_bpp = pipe_bpp
link_bpp = compressed_bpp, computed with output_bpp (i.e. pipe_bpp in
this case)

For 420 sampling with DSC:
output_bpp = pipe_bpp/2
link_bpp = compressed_bpp, computed with output_bpp

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230817142459.89764-5-ankit.k.nautiyal@intel.com

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This commit is contained in:

Ankit Nautiyal 2023-08-17 19:54:45 +05:30

parent fd279d21ed

commit 8d5284765a

3 changed files with 60 additions and 60 deletions

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84

drivers/gpu/drm/i915/display/intel_dp.c

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14

drivers/gpu/drm/i915/display/intel_dp.h

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22

drivers/gpu/drm/i915/display/intel_dp_mst.c

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