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dt: Add overrides for drm framebuffer allocations on Pi5

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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>
This commit is contained in:
Dave Stevenson
2023-10-11 11:03:51 +01:00
committed by Phil Elwell
parent 1216ea56c2
commit 61b138adae
2 changed files with 36 additions and 0 deletions
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12
arch/arm/boot/dts/bcm2712-rpi-5-b.dts
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@@ -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;
};
};

24
arch/arm/boot/dts/overlays/README
View File

@@ -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.