linux-kernel - [PATCH 3/6] drm/aspeed: Add AST2600 support

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Date:   Tue, 28 Sep 2021 10:57:00 +0800
From:   tommy-huang <tommy_huang@...eedtech.com>
To:     <joel@....id.au>, <airlied@...ux.ie>, <daniel@...ll.ch>,
        <robh+dt@...nel.org>, <andrew@...id.au>,
        <linux-aspeed@...ts.ozlabs.org>, <dri-devel@...ts.freedesktop.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <BMC-SW@...eedtech.com>
Subject: [PATCH 3/6] drm/aspeed: Add AST2600 support

From: Joel Stanley <joel@....id.au>

The values for the threshold and scan line size come from the ASPEED
SDK.

The DAC register is SCUC0 in the AST2600 datasheet. It has the same
layout as the previous generations.

Signed-off-by: Joel Stanley <joel@....id.au>
Signed-off-by: tommy-huang <tommy_huang@...eedtech.com>
---
 drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
index b53fee6f1c17..ea9cb0a4f16c 100644
--- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
+++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
@@ -79,9 +79,16 @@ static const struct aspeed_gfx_config ast2500_config = {
 	.scan_line_max = 128,
 };
 
+static const struct aspeed_gfx_config ast2600_config = {
+	.dac_reg = 0xc0,
+	.throd_val = CRT_THROD_LOW(0x50) | CRT_THROD_HIGH(0x70),
+	.scan_line_max = 128,
+};
+
 static const struct of_device_id aspeed_gfx_match[] = {
 	{ .compatible = "aspeed,ast2400-gfx", .data = &ast2400_config },
 	{ .compatible = "aspeed,ast2500-gfx", .data = &ast2500_config },
+	{ .compatible = "aspeed,ast2600-gfx", .data = &ast2600_config },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, aspeed_gfx_match);
-- 
2.17.1