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Diffstat (limited to 'freedreno/README')
| -rw-r--r-- | freedreno/README | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/freedreno/README b/freedreno/README new file mode 100644 index 00000000..ae22e013 --- /dev/null +++ b/freedreno/README @@ -0,0 +1,16 @@ +Note that current msm kernel driver is a bit strange. It provides a +DRM interface for GEM, which is basically sufficient to have DRI2 +working. But it does not provide KMS. And interface to 2d and 3d +cores is via different other devices (/dev/kgsl-*). This is not +quite how I'd write a DRM driver, but at this stage it is useful for +xf86-video-freedreno and fdre (and eventual gallium driver) to be +able to work on existing kernel driver from QCOM, to allow to +capture cmdstream dumps from the binary blob drivers without having +to reboot. So libdrm_freedreno attempts to hide most of the crazy. +The intention is that when there is a proper kernel driver, it will +be mostly just changes in libdrm_freedreno to adapt the gallium +driver and xf86-video-freedreno (ignoring the fbdev->KMS changes). + +So don't look at freedreno as an example of how to write a libdrm +module or a DRM driver.. it is just an attempt to paper over a non- +standard kernel driver architecture. |