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drm/ast: Allocate cursor BOs at high end of video memory

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By putting cursor BOs at the high end of the video memory, we can avoid
memory fragmentation. Starting at the low end, contiguous video memory is
available for framebuffers.

The patch also simplifies the buffer swapping by splitting
struct ast_private.cursor_cache BO into two separate boffer objects. Cursor
images alternate between these buffers instead of offsets within cursor_cache.

v3:
	* fixes space-before-tab error near AST_HWC_SIGNATURE_CHECKSUM

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190927090309.10254-6-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2019-09-27 11:03:09 +02:00
parent 659d1a49c6
commit 0090ef3ecb
2 changed files with 74 additions and 62 deletions
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43
drivers/gpu/drm/ast/ast_drv.h
View file

@ -82,6 +82,25 @@ enum ast_tx_chip {
#define AST_DRAM_4Gx16 7
#define AST_DRAM_8Gx16 8
#define AST_MAX_HWC_WIDTH 64
#define AST_MAX_HWC_HEIGHT 64
#define AST_HWC_SIZE (AST_MAX_HWC_WIDTH * AST_MAX_HWC_HEIGHT * 2)
#define AST_HWC_SIGNATURE_SIZE 32
#define AST_DEFAULT_HWC_NUM 2
/* define for signature structure */
#define AST_HWC_SIGNATURE_CHECKSUM 0x00
#define AST_HWC_SIGNATURE_SizeX 0x04
#define AST_HWC_SIGNATURE_SizeY 0x08
#define AST_HWC_SIGNATURE_X 0x0C
#define AST_HWC_SIGNATURE_Y 0x10
#define AST_HWC_SIGNATURE_HOTSPOTX 0x14
#define AST_HWC_SIGNATURE_HOTSPOTY 0x18
struct ast_private {
struct drm_device *dev;
@ -97,8 +116,11 @@ struct ast_private {
int fb_mtrr;
struct drm_gem_object *cursor_cache;
int next_cursor;
struct {
struct drm_gem_vram_object *gbo[AST_DEFAULT_HWC_NUM];
unsigned int next_index;
} cursor;
bool support_wide_screen;
enum {
ast_use_p2a,
@ -199,23 +221,6 @@ static inline void ast_open_key(struct ast_private *ast)
#define AST_VIDMEM_DEFAULT_SIZE AST_VIDMEM_SIZE_8M
#define AST_MAX_HWC_WIDTH 64
#define AST_MAX_HWC_HEIGHT 64
#define AST_HWC_SIZE (AST_MAX_HWC_WIDTH*AST_MAX_HWC_HEIGHT*2)
#define AST_HWC_SIGNATURE_SIZE 32
#define AST_DEFAULT_HWC_NUM 2
/* define for signature structure */
#define AST_HWC_SIGNATURE_CHECKSUM 0x00
#define AST_HWC_SIGNATURE_SizeX 0x04
#define AST_HWC_SIGNATURE_SizeY 0x08
#define AST_HWC_SIGNATURE_X 0x0C
#define AST_HWC_SIGNATURE_Y 0x10
#define AST_HWC_SIGNATURE_HOTSPOTX 0x14
#define AST_HWC_SIGNATURE_HOTSPOTY 0x18
struct ast_i2c_chan {
struct i2c_adapter adapter;
struct drm_device *dev;