media: hevc: add bounded tile-count helpers

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The stateless HEVC decoders compute the number of tile columns and rows
from num_tile_columns_minus1 / num_tile_rows_minus1 and clamp it to the
column_width_minus1[] / row_height_minus1[] capacity before using it as a
loop bound. Add shared helpers in a new <media/v4l2-hevc.h> so the rkvdec
and hantro drivers do not each open-code the min_t() clamp.

Signed-off-by: Michael Bommarito <michael.bommarito@gmail.com>
Assisted-by: Claude:claude-opus-4-8
Fixes: 256fa39208 ("media: v4l: Add definitions for HEVC stateless decoding")
Cc: stable@vger.kernel.org
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

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Michael Bommarito 2026-06-16 22:19:00 -04:00 • committed by Hans Verkuil

parent 439058ced6

commit 592dd4f844

1 changed files with 41 additions and 0 deletions

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include/media/v4l2-hevc.h

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