4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Zimmermann <tzimmermann@xxxxxxx> commit 4cfe75f0f14f044dae66ad0e6eea812d038465d9 upstream. Fix the test for the AST2200 in the DRAM initialization. The value in ast->chip has to be compared against an enum constant instead of a numerical value. This bug got introduced when the driver was first imported into the kernel. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Fixes: 312fec1405dd ("drm: Initial KMS driver for AST (ASpeed Technologies) 2000 series (v2)") Cc: Dave Airlie <airlied@xxxxxxxxxx> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx Cc: <stable@xxxxxxxxxxxxxxx> # v3.5+ Reviewed-by: Sui Jingfeng <suijingfeng@xxxxxxxxxxx> Reviewed-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> Tested-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx> # AST2600 Link: https://patchwork.freedesktop.org/patch/msgid/20230621130032.3568-2-tzimmermann@xxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/ast/ast_post.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/ast/ast_post.c +++ b/drivers/gpu/drm/ast/ast_post.c @@ -291,7 +291,7 @@ static void ast_init_dram_reg(struct drm ; } while (ast_read32(ast, 0x10100) != 0xa8); } else {/* AST2100/1100 */ - if (ast->chip == AST2100 || ast->chip == 2200) + if (ast->chip == AST2100 || ast->chip == AST2200) dram_reg_info = ast2100_dram_table_data; else dram_reg_info = ast1100_dram_table_data;