From 2c09accc2760481c578753f2fa078b947f3a0a99 Mon Sep 17 00:00:00 2001
From: KuoHsiang Chou <kuohsiang_chou@aspeedtech.com>
Date: Mon, 17 Jan 2022 16:36:43 +0800
Subject: drm/ast: Create threshold values for AST2600
Git-commit: bcc77411e8a65929655cef7b63a36000724cdc4b
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
The threshold value is used for AST2600 only.
Signed-off-by: KuoHsiang Chou <kuohsiang_chou@aspeedtech.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220117083643.41493-1-kuohsiang_chou@aspeedtech.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/ast/ast_mode.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 956c8982192b..ab52efb15670 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -471,7 +471,10 @@ static void ast_set_color_reg(struct ast_private *ast,
static void ast_set_crtthd_reg(struct ast_private *ast)
{
/* Set Threshold */
- if (ast->chip == AST2300 || ast->chip == AST2400 ||
+ if (ast->chip == AST2600) {
+ ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa7, 0xe0);
+ ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa6, 0xa0);
+ } else if (ast->chip == AST2300 || ast->chip == AST2400 ||
ast->chip == AST2500) {
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa7, 0x78);
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa6, 0x60);
--
2.38.1