David Lechner 3e41ae3fdd drm/sitronix/st7586: fix bad pixel data due to byte swap ...

[ Upstream commit 46d8a07b4a ]

Correctly set dbi->write_memory_bpw for the ST7586 driver. This driver
is for a monochrome display that has an unusual data format, so the
default value set in mipi_dbi_spi_init() is not correct simply because
this controller is non-standard.

Previously, we were using dbi->swap_bytes to make the same sort of
workaround, but it was removed in the same commit that added
dbi->write_memory_bpw, so we need to use the latter now to have the
correct behavior.

This fixes every 3 columns of pixels being swapped on the display. There
are 3 pixels per byte, so the byte swap caused this effect.

Fixes: df3fb27a74 ("drm/mipi-dbi: Make bits per word configurable for pixel transfers")
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20260228-drm-mipi-dbi-fix-st7586-byte-swap-v1-1-e78f6c24cd28@baylibre.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-03-25 11:08:27 +01:00

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arcpgu.c

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bochs.c

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cirrus.c

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gm12u320.c

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hx8357d.c

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ili9163.c

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ili9225.c

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ili9341.c

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ili9486.c

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Kconfig

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Makefile

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mi0283qt.c

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ofdrm.c

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panel-mipi-dbi.c

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repaper.c

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simpledrm.c

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st7586.c

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st7735r.c

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