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path: root/drivers/gpu/drm/ast/ast_reg.h
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Diffstat (limited to 'drivers/gpu/drm/ast/ast_reg.h')
-rw-r--r--drivers/gpu/drm/ast/ast_reg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ast/ast_reg.h b/drivers/gpu/drm/ast/ast_reg.h
index e15adaf3a80e..30578e3b07e4 100644
--- a/drivers/gpu/drm/ast/ast_reg.h
+++ b/drivers/gpu/drm/ast/ast_reg.h
@@ -29,6 +29,7 @@
#define AST_IO_VGAGRI (0x4E)
#define AST_IO_VGACRI (0x54)
+#define AST_IO_VGACR17_SYNC_ENABLE BIT(7) /* called "Hardware reset" in docs */
#define AST_IO_VGACR80_PASSWORD (0xa8)
#define AST_IO_VGACR99_VGAMEM_RSRV_MASK GENMASK(1, 0)
#define AST_IO_VGACRA1_VGAIO_DISABLED BIT(1)