Francesco Lavra 98c92c9b24 drm/solomon: Fix page start when updating rectangle in page addressing mode ...

[ Upstream commit 36d9579fed ]

In page addressing mode, the pixel values of a dirty rectangle must be sent
to the display controller one page at a time. The range of pages
corresponding to a given rectangle is being incorrectly calculated as if
the Y value of the top left coordinate of the rectangle was 0. This can
result in rectangle updates being displayed on wrong parts of the screen.

Fix the above issue by consolidating the start page calculation in a single
place at the beginning of the update_rect function, and using the
calculated value for all addressing modes.

Fixes: b0daaa5cfa ("drm/ssd130x: Support page addressing mode")
Signed-off-by: Francesco Lavra <flavra@baylibre.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patch.msgid.link/20260210180932.736502-1-flavra@baylibre.com
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-03-13 17:20:38 +01:00

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Kconfig

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Makefile

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ssd130x-i2c.c

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ssd130x-spi.c

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ssd130x.c

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ssd130x.h

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