Hi Sven, Le mercredi 03 février 2021 à 11:33 -0500, Sven Van Asbroeck a écrit : > From: Sven Van Asbroeck <thesven73@xxxxxxxxx> > > We have observed that under certain repeatable circumstances, the CODA > mem2mem device consistently generates corrupted frames. This happens only > on an i.MX6qp (Plus) - the classic imx6q is not affected. > > This happens when the virtual X screen is wider than 0x900 pixels (1). Are you sure you aren't just running out of CMA ? This is the only things that comes to mind at the moment, sorry if it's not that useful. > > Quite strange, because CODA is a mem2mem device, and is presumably not > touching > any of the IPU/GPU2D/GPU3D infrastructure used by X. Except if there is a > hidden > dependency somehow. > > I have captured and visualized generated CODA frames as follows: > gst-launch-1.0 playbin uri=file:///home/default/nycTrain1080p.mp4 flags=0x45 > video-sink='multifilesink location=frame%d.yuv' > See (2) for how I converted the raw YUV frame to a PNG image. > > For example, the following will break CODA mpeg4 decode (width >= 0x900): > # xrandr --fb 2400x1088 > Screen 0: minimum 1 x 1, current 2400 x 1088, maximum 4096 x 4096 > HDMI1 disconnected (normal left inverted right x axis y axis) > LVDS1 connected primary 1280x800+0+0 (normal left inverted right x axis y > axis) 0mm x 0mm > 1280x800 59.79*+ > > Resulting frame when dumped with multifilesink (NOT written to the display): > https://gitlab.com/TheSven73/coda-investigation/-/blob/master/stripes.png > > And the following will restore CODA mpeg4 decode (width < 0x900): > # xrandr --fb 2300x1088 > Screen 0: minimum 1 x 1, current 2300 x 1088, maximum 4096 x 4096 > HDMI1 disconnected (normal left inverted right x axis y axis) > LVDS1 connected primary 1280x800+0+0 (normal left inverted right x axis y > axis) 0mm x 0mm > 1280x800 59.79*+ > > Resulting frame when dumped with multifilesink (NOT written to the display): > https://gitlab.com/TheSven73/coda-investigation/-/blob/master/ok.png > > Additional info: > - only the virtual X screen width seems to trigger the issue, it is > independent of the height. > - issue seems independent of the pixel format. Forcing CODA to output NV12 > shows the same behaviour. > > System description: > - i.MX6 QuadPlus: > [ 0.144518] CPU identified as i.MX6QP, silicon rev 1.1 > - mainline Linux v5.9.16 with a small private patchset on top > (patchset does not touch CODA) > - CODA960 silicon contained within i.MX6 QuadPlus: > [ 4798.510033] coda 2040000.vpu: Firmware code revision: 46076 > [ 4798.515916] coda 2040000.vpu: Initialized CODA960. > [ 4798.520779] coda 2040000.vpu: Firmware version: 3.1.1 > - gstreamer from buildroot: > gst-launch-1.0 version 1.16.2 > GStreamer 1.16.2 > - X from buildroot, using armada and etnadrm_gpu plugins: > X.Org X Server 1.20.7 > X Protocol Version 11, Revision 0 > [ 99.527] (II) LoadModule: "armada" > [ 99.527] (II) Loading /usr/lib/xorg/modules/drivers/armada_drv.so > [ 99.538] (II) Module armada: vendor="X.Org Foundation" > [ 99.538] compiled for 1.20.7, module version = 0.0.0 > [ 99.538] Module class: X.Org Video Driver > [ 99.538] ABI class: X.Org Video Driver, version 24.1 > [ 99.538] (II) armada: Support for Marvell LCD Controller: 88AP510 > [ 99.539] (II) armada: Support for Freescale IPU: i.MX6 > [ 99.545] (II) armada(0): Added screen for KMS device /dev/dri/card1 > [ 99.561] (II) armada(0): hardware: imx-drm > [ 99.563] (**) armada(0): Option "AccelModule" "etnadrm_gpu" > [ 99.563] (II) Loading sub module "etnadrm_gpu" > [ 99.563] (II) LoadModule: "etnadrm_gpu" > [ 99.564] (II) Loading /usr/lib/xorg/modules/drivers/etnadrm_gpu.so > [ 99.576] (II) Module Etnaviv GPU driver (DRM): vendor="X.Org Foundation" > [ 99.576] compiled for 1.20.7, module version = 0.0.0 > > > (1) When using multiple displays, the virtual X screen is typically the > bounding > rectangle which includes all screens. That's why it can become wider than > 1920 pixels. > > (2) > > # Convert raw YUYV to PNG > # Python, runs out of the box on a stock Google Colab notebook > import cv2 > import numpy as np > import matplotlib.pyplot as plt > import matplotlib > > img = np.fromfile('frame1.yuv', dtype=np.uint8) > # YUYV has two 8-bit channels per pixel > img.shape = (1088, 1920, 2) > > img2 = cv2.cvtColor(img, cv2.COLOR_YUV2RGB_YUYV) > plt.imshow(img2) > matplotlib.image.imsave('frame1.png', img2) > > To: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> > To: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> > Cc: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx> > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx> > Cc: Fabio Estevam <festevam@xxxxxxxxx> > Cc: linux-media@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx
