drm/modes: Add a function to generate analog display modes

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Multiple drivers (meson, vc4, sun4i) define analog TV 525-lines and
625-lines modes in their drivers.

Since those modes are fairly standard, and that we'll need to use them
in more places in the future, it makes sense to move their definition
into the core framework.

However, analog display usually have fairly loose timings requirements,
the only discrete parameters being the total number of lines and pixel
clock frequency. Thus, we created a function that will create a display
mode from the standard, the pixel frequency and the active area.

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-v10-6-256dad125326@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>

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Maxime Ripard 2022-11-17 10:28:49 +01:00

parent 7d63cd8526

commit 4fcd238560

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476

drivers/gpu/drm/drm_modes.c

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1

drivers/gpu/drm/tests/Makefile

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145

drivers/gpu/drm/tests/drm_modes_test.c

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17

include/drm/drm_modes.h

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