From: Thomas Zimmermann Date: Wed, 5 Mar 2025 16:30:42 +0000 (+0100) Subject: drm/ast: Add VGACR99 register constants X-Git-Tag: v6.16-rc1~144^2~21^2~218 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a958c7f13b0b4ffd41384293d307b9d6218fcc87;p=thirdparty%2Flinux.git drm/ast: Add VGACR99 register constants Add register constants for VGACR99 and use them when detecting the size of the VGA memory. Aligns the code with the programming manual. Also replace literal size values with Linux' SZ_ size constants. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-4-tzimmermann@suse.de --- diff --git a/drivers/gpu/drm/ast/ast_mm.c b/drivers/gpu/drm/ast/ast_mm.c index 8d8aac8c0814a..3d03ef556d0ad 100644 --- a/drivers/gpu/drm/ast/ast_mm.c +++ b/drivers/gpu/drm/ast/ast_mm.c @@ -35,9 +35,8 @@ static u32 ast_get_vram_size(struct ast_device *ast) { - u8 jreg; u32 vram_size; - u8 vgacraa; + u8 vgacr99, vgacraa; vgacraa = ast_get_index_reg(ast, AST_IO_VGACRI, 0xaa); switch (vgacraa & AST_IO_VGACRAA_VGAMEM_SIZE_MASK) { @@ -55,16 +54,16 @@ static u32 ast_get_vram_size(struct ast_device *ast) break; } - jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0x99, 0xff); - switch (jreg & 0x03) { + vgacr99 = ast_get_index_reg(ast, AST_IO_VGACRI, 0x99); + switch (vgacr99 & AST_IO_VGACR99_VGAMEM_RSRV_MASK) { case 1: - vram_size -= 0x100000; + vram_size -= SZ_1M; break; case 2: - vram_size -= 0x200000; + vram_size -= SZ_2M; break; case 3: - vram_size -= 0x400000; + vram_size -= SZ_4M; break; } diff --git a/drivers/gpu/drm/ast/ast_reg.h b/drivers/gpu/drm/ast/ast_reg.h index 039b93bed19e5..e15adaf3a80e1 100644 --- a/drivers/gpu/drm/ast/ast_reg.h +++ b/drivers/gpu/drm/ast/ast_reg.h @@ -30,6 +30,7 @@ #define AST_IO_VGACRI (0x54) #define AST_IO_VGACR80_PASSWORD (0xa8) +#define AST_IO_VGACR99_VGAMEM_RSRV_MASK GENMASK(1, 0) #define AST_IO_VGACRA1_VGAIO_DISABLED BIT(1) #define AST_IO_VGACRA1_MMIO_ENABLED BIT(2) #define AST_IO_VGACRA3_DVO_ENABLED BIT(7)