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drm/ast: Don't clear base address and offset with default values 

The content of the base-address and offset registers are state of
the primary plane. Clearing it to default values will interfere with
plane functions for atomic mode setting.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191107083404.6852-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2019-11-07 09:33:58 +01:00
parent 9253f830c9
commit a21fdd7a4c
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/ast/ast_mode.c
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@ -253,9 +253,13 @@ static void ast_set_std_reg(struct drm_crtc *crtc, struct drm_display_mode *mode
ast_set_index_reg(ast, AST_IO_SEQ_PORT, (i + 1) , jreg);
}
/* Set CRTC */
/* Set CRTC; except base address and offset */
ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x11, 0x7f, 0x00);
for (i = 0; i < 25; i++)
for (i = 0; i < 12; i++)
ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
for (i = 14; i < 19; i++)
ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
for (i = 20; i < 25; i++)
ast_set_index_reg(ast, AST_IO_CRTC_PORT, i, stdtable->crtc[i]);
/* set AR */