drm/probe-helper: Provide a TV get_modes helper

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Most of the TV connectors will need a similar get_modes implementation
that will, depending on the drivers' capabilities, register the 480i and
576i modes.

That implementation will also need to set the preferred flag and order
the modes based on the driver and users preferrence.

This is especially important to guarantee that a userspace stack such as
Xorg can start and pick up the preferred mode while maintaining a
working output.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Tested-by: Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>
Acked-in-principle-or-something-like-that-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v10-12-256dad125326@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

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Noralf Trønnes 2022-11-17 10:28:55 +01:00 • committed by Maxime Ripard

parent 0740ac381b

commit 1e4a91db10

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82

drivers/gpu/drm/drm_probe_helper.c

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1

drivers/gpu/drm/tests/Makefile

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205

drivers/gpu/drm/tests/drm_probe_helper_test.c

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1

include/drm/drm_probe_helper.h

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