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anholt
Raspberry Pi 3. + Official screen 7''. I've downloaded latest raspbian, did all the required things like apt-get update, upgrade etc. (UPDATE: And I am sure I've enabled something that...
When we're scanning out (for example) to a RGB565 panel from an RGB888 framebuffer, we should enable HVS's dithering. The firmware does this for DPI panels.
After some time of uptime on the Raspberry Pi 3 we're seeing a crash with 4.10 in the i2c_bcm2835 driver. The RPI2 is stable. It happens even on a minimal...
By visiting the following page using Chromium (Version 48.0.2564.82 Built on Ubuntu 15.04, running on Raspbian 8.0, with hardware acceleration for WebGL), and setting the renderer option to "WebGL", my...
[dmesg.txt](https://github.com/anholt/linux/files/655522/dmesg.txt) [ui.LATEST.txt](https://github.com/anholt/linux/files/655521/ui.LATEST.txt) [Xorg.0.log_with_hdmi.txt](https://github.com/anholt/linux/files/655520/Xorg.0.log_with_hdmi.txt) Hi, I am trying to boot Chromium R53 on RaspberryPi3 using the rpi-4.4.y linux kernel which has the most recent VC4 fixes. The system boots but without...
danvet said about our clock_select detection in `vc4_crtc.c`: > Hm, so the usual way we solve the "crtc needs information from the encoder > problem" is to add bits to...
It would be nice if we used our FIFO underrun interrupts to detect when we've screwed something up in our modesetting sequence. Enable the `DSPnEISLUR` interrupts, and debug all instances...
If we read out the current state of our PV/HVS/HDMI registers at boot, we could potentially recognize that the initial mode that fbdev chooses matches what the firmware had configured,...
When we're only doing 1:1 RGBA scaling and aren't using the LBM memory, we could power it down (bit 30 of `SCALER_DISPCTRL`. Note that it takes 1000 cycles of the...
We should disable `SCALER_DISPCTRL`'s `ENABLE` bit (31) when we're not using any of the HVS channels. Make sure that all `DISPCTRLn` are disabled first, and have raised their `EOF` flags...