Hi Maíra, [add Phil & Dave]
Am 12.04.24 um 15:25 schrieb Maíra Canal:
RPi 0-3 is packed with a GPU that provides 3D rendering capabilities to the RPi. Currently, the downstream kernel uses an overlay to enable the GPU and use GPU hardware acceleration. When deploying a mainline kernel to the RPi 0-3, we end up without any GPU hardware acceleration (essentially, we can't use the OpenGL driver). Therefore, enable the V3D core for the RPi 0-3 in the mainline kernel.
thanks for trying to improve the combination Raspberry Pi OS + Mainline Kernel. I think i'm able to reproduce the issue with Raspberry Pi 3 B + on Buster. From the kernel side everything looks good: [ 11.054833] vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4]) [ 11.055118] vc4-drm soc:gpu: bound 3f806000.vec (ops vc4_vec_ops [vc4]) [ 11.055340] vc4-drm soc:gpu: bound 3f004000.txp (ops vc4_txp_ops [vc4]) [ 11.055521] vc4-drm soc:gpu: bound 3f206000.pixelvalve (ops vc4_crtc_ops [vc4]) [ 11.055695] vc4-drm soc:gpu: bound 3f207000.pixelvalve (ops vc4_crtc_ops [vc4]) [ 11.055874] vc4-drm soc:gpu: bound 3f807000.pixelvalve (ops vc4_crtc_ops [vc4]) [ 11.056020] vc4-drm soc:gpu: bound 3fc00000.v3d (ops vc4_v3d_ops [vc4]) [ 11.063277] Bluetooth: hci0: BCM4345C0 'brcm/BCM4345C0.raspberrypi,3-model-b-plus.hcd' Patch [ 11.070466] [drm] Initialized vc4 0.0.0 20140616 for soc:gpu on minor 0 [ 11.174803] Console: switching to colour frame buffer device 240x75 [ 11.205125] vc4-drm soc:gpu: [drm] fb0: vc4drmfb frame buffer device But in Raspberry Pi OS there is a systemd script which is trying to check for the V3D driver /usr/lib/systemd/scripts/gldriver_test.sh Within the first check "raspi-config nonint is_kms" is called, which always seems to fail. If i run strace on this command it seems to check for /proc/device-tree/soc/v3d@7ec00000/status which doesn't exists in the Mainline device tree. Maybe there is a chance to improve the userspace tool?
Signed-off-by: Maíra Canal <mca...@igalia.com> --- I decided to add the status property to the `bcm2835-common.dtsi`, but there are two other options: 1. To add the status property to the `bcm2835-rpi-common.dtsi` file 2. To add the status property to each individual RPi model, e.g. `bcm2837-rpi-3-b.dts`. Let me know which option is more suitable, and if `bcm2835-common.dtsi` is not the best option, I can send a v2. Best Regards, - Maíra arch/arm/boot/dts/broadcom/bcm2835-common.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi b/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi index 9261b67dbee1..851a6bce1939 100644 --- a/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi +++ b/arch/arm/boot/dts/broadcom/bcm2835-common.dtsi @@ -139,6 +139,7 @@ v3d: v3d@7ec00000 { compatible = "brcm,bcm2835-v3d"; reg = <0x7ec00000 0x1000>; interrupts = <1 10>; + status = "okay"; }; vc4: gpu {