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hw/display/vga: Do not reset 'big_endian_fb' in vga_common_reset() 

The 'pci-vga' device allow setting a 'big-endian-framebuffer'
property since commit 3c2784fc86 ("vga: Expose framebuffer
byteorder as a QOM property"). Similarly, the 'virtio-vga'
device since commit 8be61ce2ce ("virtio-vga: implement
big-endian-framebuffer property").

Both call vga_common_reset() in their reset handler, respectively
pci_secondary_vga_reset() and virtio_vga_base_reset_hold(), which
reset 'big_endian_fb', overwritting the property. This is not
correct: the hardware is expected to keep its configured
endianness during resets.

Move 'big_endian_fb' assignment from vga_common_reset() to
vga_common_init() which is called once when the common VGA state
is initialized.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Message-Id: <20241129101721.17836-2-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2024-11-28 18:54:09 +01:00
parent 5311599cdc
commit 302075f85e
1 changed files with 1 additions and 1 deletions
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2
hw/display/vga.c
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@ -1873,7 +1873,6 @@ void vga_common_reset(VGACommonState *s)
s->cursor_start = 0;
s->cursor_end = 0;
s->cursor_offset = 0;
s->big_endian_fb = s->default_endian_fb;
memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table));
memset(s->last_palette, '\0', sizeof(s->last_palette));
memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr));
@ -2266,6 +2265,7 @@ bool vga_common_init(VGACommonState *s, Object *obj, Error **errp)
* all target endian dependencies from this file.
*/
s->default_endian_fb = target_words_bigendian();
s->big_endian_fb = s->default_endian_fb;
vga_dirty_log_start(s);