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drm/ast: Remove little-endianism from I/O helpers

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Replace one call to ast_io_write16() with two calls to ast_io_write8()
in ast_set_index_reg(). The combined 16-bit-wide write of an index
register and the corresponding data register only works on little-
endian systems. Write both registers independent from each other.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230221155745.27484-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2023-02-21 16:57:42 +01:00
parent ba3f6db4af
commit a384108606
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/ast/ast_drv.h
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@ -282,7 +282,9 @@ static inline void ast_set_index_reg(struct ast_private *ast,
uint32_t base, uint8_t index,
uint8_t val)
{
ast_io_write16(ast, base, ((u16)val << 8) | index);
ast_io_write8(ast, base, index);
++base;
ast_io_write8(ast, base, val);
}
void ast_set_index_reg_mask(struct ast_private *ast,