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drm/ast: Move cursor pageflip into helper

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The new helper ast_cursor_page_flip() switches the cursor's front and
back BOs. This simplifies the cursor plane's update helper.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-6-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2020-07-02 13:50:20 +02:00
parent 932a62aa3b
commit 75d9d8e66d
3 changed files with 21 additions and 13 deletions
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20
drivers/gpu/drm/ast/ast_cursor.c
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@@ -198,7 +198,7 @@ err_drm_gem_vram_unpin:
return ret;
}
void ast_cursor_set_base(struct ast_private *ast, u64 address)
static void ast_cursor_set_base(struct ast_private *ast, u64 address)
{
u8 addr0 = (address >> 3) & 0xff;
u8 addr1 = (address >> 11) & 0xff;
@@ -209,6 +209,24 @@ void ast_cursor_set_base(struct ast_private *ast, u64 address)
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xca, addr2);
}
void ast_cursor_page_flip(struct ast_private *ast)
{
struct drm_device *dev = ast->dev;
struct drm_gem_vram_object *gbo;
s64 off;
gbo = ast->cursor.gbo[ast->cursor.next_index];
off = drm_gem_vram_offset(gbo);
if (drm_WARN_ON_ONCE(dev, off < 0))
return; /* Bug: we didn't pin the cursor HW BO to VRAM. */
ast_cursor_set_base(ast, off);
++ast->cursor.next_index;
ast->cursor.next_index %= ARRAY_SIZE(ast->cursor.gbo);
}
int ast_cursor_move(struct drm_crtc *crtc, int x, int y)
{
struct ast_crtc *ast_crtc = to_ast_crtc(crtc);