Thomas Zimmermann 2dae4a71a1 drm/cirrus-qemu: Fix pitch programming ...

commit 4bfb389a01 upstream.

Do not set CR1B[6] when programming the pitch. The bit effects VGA
text mode and is not interpreted by qemu. [1] It has no affect on
the scanline pitch.

The scanline bit that is set into CR1B[6] belongs into CR13[7], which
the driver sets up correctly.

This bug goes back to the driver's initial commit.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://gitlab.com/qemu-project/qemu/-/blob/stable-9.2/hw/display/cirrus_vga.c?ref_type=heads#L1112 # 1
Fixes: f9aa76a852 ("drm/kms: driver for virtual cirrus under qemu")
Cc: Adam Jackson <ajax@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: <stable@vger.kernel.org> # v3.5+
Link: https://lore.kernel.org/r/20250328091821.195061-2-tzimmermann@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-07-06 11:01:44 +02:00

..

arcpgu.c

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bochs.c

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cirrus.c

drm/cirrus-qemu: Fix pitch programming

2025-07-06 11:01:44 +02:00

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

drm/tiny: panel-mipi-dbi: Use drm_client_setup_with_fourcc()

2025-05-22 14:29:53 +02:00

repaper.c

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simpledrm.c

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st7586.c

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st7735r.c

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