openwrt/target/linux/bcm27xx/patches-5.10/950-0564-drm-vc4-dsi-Add-configuration-for-BCM2711-DSI1.patch

From 24b8230e039c6bef2dcc0ea4ca7cb5d2441570f1 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Thu, 3 Dec 2020 14:25:42 +0100
Subject: [PATCH] drm/vc4: dsi: Add configuration for BCM2711 DSI1

Commit d0666be8ef9e8e65d4b7fabc1606ec51f61384c0 upstream.

BCM2711 DSI1 doesn't have the issue with the ARM not being
able to write to the registers, therefore remove the DMA
workaround for that compatible string.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201203132543.861591-8-maxime@cerno.tech
---
 drivers/gpu/drm/vc4/vc4_dsi.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_dsi.c
+++ b/drivers/gpu/drm/vc4/vc4_dsi.c
@@ -1374,6 +1374,13 @@ static const struct drm_encoder_helper_f
 	.mode_fixup = vc4_dsi_encoder_mode_fixup,
 };
 
+static const struct vc4_dsi_variant bcm2711_dsi1_variant = {
+	.port			= 1,
+	.debugfs_name		= "dsi1_regs",
+	.regs			= dsi1_regs,
+	.nregs			= ARRAY_SIZE(dsi1_regs),
+};
+
 static const struct vc4_dsi_variant bcm2835_dsi0_variant = {
 	.port			= 0,
 	.debugfs_name		= "dsi0_regs",
@@ -1390,6 +1397,7 @@ static const struct vc4_dsi_variant bcm2
 };
 
 static const struct of_device_id vc4_dsi_dt_match[] = {
+	{ .compatible = "brcm,bcm2711-dsi1", &bcm2711_dsi1_variant },
 	{ .compatible = "brcm,bcm2835-dsi0", &bcm2835_dsi0_variant },
 	{ .compatible = "brcm,bcm2835-dsi1", &bcm2835_dsi1_variant },
 	{}
@@ -1577,8 +1585,8 @@ static int vc4_dsi_bind(struct device *d
 		return -ENODEV;
 	}
 
-	/* DSI1 has a broken AXI slave that doesn't respond to writes
-	 * from the ARM.  It does handle writes from the DMA engine,
+	/* DSI1 on BCM2835/6/7 has a broken AXI slave that doesn't respond to
+	 * writes from the ARM.  It does handle writes from the DMA engine,
 	 * so set up a channel for talking to it.
 	 */
 	if (dsi->variant->broken_axi_workaround) {