media: qcom: camss: vfe: Make PIX BPL alignment format-based on CAMSS_2290

media: qcom: camss: vfe: Make PIX BPL alignment format-based on CAMSS_2290

Split the VFE bytes-per-line (BPL) alignment logic into separate
helpers for RDI and PIX paths. RDI is usually aligned on RDI write
engine bus constraint such as 64-bit or 128-bit. But PIX engine
is usually (at least on platform I looked at) based on pixel format.

On CAMSS_2290, PIX BPL alignment is set to 0 to indicate that the
alignment must be derived from the pixel format. This allows the
pipeline to use camss_format_get_bpl_alignment().

For other platforms, retain the legacy PIX default (16 bytes), until
PIX is properly tested/enabled.

A future improvement would be to remove platform-specific conditionals
from the VFE code and move the alignment requirements into the
per-platform VFE resource data.

Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
[bod: Fixed straggling newlines]
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>