Add a TODO file listing all that is need for destaging. Signed-off-by: Robert Beckett <bob.beckett@xxxxxxxxxxxxx> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx> --- drivers/staging/media/wave5/TODO | 64 ++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 drivers/staging/media/wave5/TODO diff --git a/drivers/staging/media/wave5/TODO b/drivers/staging/media/wave5/TODO new file mode 100644 index 000000000000..425ed42a234c --- /dev/null +++ b/drivers/staging/media/wave5/TODO @@ -0,0 +1,64 @@ +* Test on real silicon once available + + This driver has so far been tested on pre-silicon FPGA and on the beta BeagleV + board which uses the StarFive JH7100 beta SoC. + + Testing on FPGA shows it working fine, though the FPGA uses polled interrupts + and copied buffers between the host and it's on board RAM. + + Testing on BeagleV shows buffer corruption that is currently attributed to a + known silicon issue in the SoC that makes the cache coherent interconnect not + so coherent. + This can likely be solved when the riscv non-coherent dma support lands and + provide optional v4l2 non-contiguous allocator, though it remains to be seen + whether support non-coherent use cases will be useful in real world hw. + + Until we can test and resolve any issues on final silicon (due 2H 2021) + this driver should remain in staging. + +* Handle interrupts better + + Currently the interrupt handling uses an unusual design employing a kfifo to + transfer irq status to irq thread. This was done as a work around for dropped + interrupts seen with IRQF_ONESHOT based handling. + + This needs further investigation and fixing properly, with the aid of + C&M and StarFive engineers. + +* Fix early end of stream handling + + When using a gstreamer pipeline like this: + gst-launch-1.0 filesrc location=<file> ! parsebin ! h264parse ! v4l2h264dec ! jpegenc ! identity eos-after=3 ! multifilesink location=%05d.jpeg + i.e. forced eos after 3 buffers + the pipeline stalls on exit waiting for end of job. + We need to add some form of early exit detection, instead of the current + behaviour of only considering a job finish on PIC_END. + +* Support more formats + + The current frontend v4l2 layer only supports V4L2_PIX_FMT_HEVC and + V4L2_PIX_FMT_H264. + The backend logic supports other formats, so we should wire up the support + for further bitsream formats. + +* appropreate error handling: +allocation failure, mutex acquire failure etc. + +* remove all unused struct fields + +* change struct fields to 'bool' type or bitfield when appropreate +Likely good candidates are fields named '*_enable' , '*_on' + +* handle vdi_allocate_dma_memory failure , each function has to clean after itself + +* make sure that 'u32', 's32' etc. are only used when reading/writing hw +and change s32 to u32 when s32 is not required + +* power management handling - add (runtime_)suspen/resume cb where the clock is enabled + +* fix checkpatch issues (mostly fixes , only left to fix MACRO_ARG_REUSE, LONG_LINE) + +* revise logic of wave5_vpu_(dec/enc)_register_framebuffer + +* check if the normal kernel endianness/__swab32 routines are sufficient. (instead of the ones + implemented in the driver -- 2.17.1
