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From 61b138adaeaddefe749f421a3b69c67d4a49a8e3 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
Date: Wed, 11 Oct 2023 11:03:51 +0100
Subject: [PATCH] dt: Add overrides for drm framebuffer allocations on Pi5
Adds dtparam overrides to the base Pi5 DT such that vc4,
DSI0, DSI1, or DPI can be requested to be /dev/fb[012].
No override is specified by default, so the order will be
based on probe order (aka semi-random). Any device that
doesn't have an override specified will be placed above
all specified overrides. Having an fb1 or fb2 override but
no fb0 one will result in no console via fbcon.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
arch/arm/boot/dts/bcm2712-rpi-5-b.dts | 12 ++++++++++++
arch/arm/boot/dts/overlays/README | 24 ++++++++++++++++++++++++
2 files changed, 36 insertions(+)
--- a/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
+++ b/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
@@ -824,5 +824,17 @@ spi10_cs_pins: &spi10_cs_gpio1 {};
act_led_trigger = <&act_led>, "linux,default-trigger";
pwr_led_activelow = <&pwr_led>, "gpios:8";
pwr_led_trigger = <&pwr_led>, "linux,default-trigger";
+ drm_fb0_rp1_dsi0 = <&aliases>, "drm_fb0=",&dsi0;
+ drm_fb0_rp1_dsi1 = <&aliases>, "drm_fb0=",&dsi1;
+ drm_fb0_rp1_dpi = <&aliases>, "drm_fb0=",&dpi;
+ drm_fb0_vc4 = <&aliases>, "drm_fb0=",&vc4;
+ drm_fb1_rp1_dsi0 = <&aliases>, "drm_fb1=",&dsi0;
+ drm_fb1_rp1_dsi1 = <&aliases>, "drm_fb1=",&dsi1;
+ drm_fb1_rp1_dpi = <&aliases>, "drm_fb1=",&dpi;
+ drm_fb1_vc4 = <&aliases>, "drm_fb1=",&vc4;
+ drm_fb2_rp1_dsi0 = <&aliases>, "drm_fb2=",&dsi0;
+ drm_fb2_rp1_dsi1 = <&aliases>, "drm_fb2=",&dsi1;
+ drm_fb2_rp1_dpi = <&aliases>, "drm_fb2=",&dpi;
+ drm_fb2_vc4 = <&aliases>, "drm_fb2=",&vc4;
};
};
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -173,6 +173,30 @@ Params:
cooling_fan Enables the Pi 5 cooling fan (enabled
automatically by the firmware)
+ drm_fb0_rp1_dpi Assign /dev/fb0 to the RP1 DPI output
+
+ drm_fb0_rp1_dsi0 Assign /dev/fb0 to the RP1 DSI0 output
+
+ drm_fb0_rp1_dsi1 Assign /dev/fb0 to the RP1 DSI1 output
+
+ drm_fb0_vc4 Assign /dev/fb0 to the vc4 outputs
+
+ drm_fb1_rp1_dpi Assign /dev/fb1 to the RP1 DPI output
+
+ drm_fb1_rp1_dsi0 Assign /dev/fb1 to the RP1 DSI0 output
+
+ drm_fb1_rp1_dsi1 Assign /dev/fb1 to the RP1 DSI1 output
+
+ drm_fb1_vc4 Assign /dev/fb1 to the vc4 outputs
+
+ drm_fb2_rp1_dpi Assign /dev/fb2 to the RP1 DPI output
+
+ drm_fb2_rp1_dsi0 Assign /dev/fb2 to the RP1 DSI0 output
+
+ drm_fb2_rp1_dsi1 Assign /dev/fb2 to the RP1 DSI1 output
+
+ drm_fb2_vc4 Assign /dev/fb2 to the vc4 outputs
+
eee Enable Energy Efficient Ethernet support for
compatible devices (default "on"). See also
"tx_lpi_timer". Pi3B+ only.
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