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authorY.C. Chen <yc_chen@aspeedtech.com>2017-02-23 15:52:33 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-15 09:57:14 +0800
commitb9cfd5517b309513e50d80b89eaae98a82a2c3b1 (patch)
tree9d6333dadab9f7f4bc97a856de296f3fb5e2f816
parent93eab4f5259485e9cad0339a298b6da1dd2e6e40 (diff)
downloadlinux-linaro-stable-b9cfd5517b309513e50d80b89eaae98a82a2c3b1.tar.gz
drm/ast: Fix AST2400 POST failure without BMC FW or VBIOS
commit 3856081eede297b617560b85e948cfb00bb395ec upstream. The current POST code for the AST2300/2400 family doesn't work properly if the chip hasn't been initialized previously by either the BMC own FW or the VBIOS. This fixes it. Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Y.C. Chen <yc_chen@aspeedtech.com> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/gpu/drm/ast/ast_post.c38
1 files changed, 35 insertions, 3 deletions
diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c
index 50836e549867..30672a3df8a9 100644
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -1626,12 +1626,44 @@ static void ast_init_dram_2300(struct drm_device *dev)
temp |= 0x73;
ast_write32(ast, 0x12008, temp);
+ param.dram_freq = 396;
param.dram_type = AST_DDR3;
+ temp = ast_mindwm(ast, 0x1e6e2070);
if (temp & 0x01000000)
param.dram_type = AST_DDR2;
- param.dram_chipid = ast->dram_type;
- param.dram_freq = ast->mclk;
- param.vram_size = ast->vram_size;
+ switch (temp & 0x18000000) {
+ case 0:
+ param.dram_chipid = AST_DRAM_512Mx16;
+ break;
+ default:
+ case 0x08000000:
+ param.dram_chipid = AST_DRAM_1Gx16;
+ break;
+ case 0x10000000:
+ param.dram_chipid = AST_DRAM_2Gx16;
+ break;
+ case 0x18000000:
+ param.dram_chipid = AST_DRAM_4Gx16;
+ break;
+ }
+ switch (temp & 0x0c) {
+ default:
+ case 0x00:
+ param.vram_size = AST_VIDMEM_SIZE_8M;
+ break;
+
+ case 0x04:
+ param.vram_size = AST_VIDMEM_SIZE_16M;
+ break;
+
+ case 0x08:
+ param.vram_size = AST_VIDMEM_SIZE_32M;
+ break;
+
+ case 0x0c:
+ param.vram_size = AST_VIDMEM_SIZE_64M;
+ break;
+ }
if (param.dram_type == AST_DDR3) {
get_ddr3_info(ast, &param);