Hi Hans,
On Fri, 2016-04-29 at 13:14 +0200, Hans Verkuil wrote:
> Hi Tiffany,
>
> On 04/26/2016 10:58 AM, Tiffany Lin wrote:
> > ==============
> > Introduction
> > ==============
> >
> > The purpose of this series is to add the driver for video codec hw embedded
> > in the Mediatek's MT8173 SoCs.
> > Mediatek Video Codec is able to handle video encoding of in a range of
> > formats.
> >
> > This patch series also include VPU driver. Mediatek Video Codec driver rely
> > on VPU driver to load,
> > communicate with VPU.
> >
> > Internally the driver uses videobuf2 framework and MTK IOMMU and MTK SMI
> > both have been merged in v4.6-rc1.
> >
> > ==================
> > Device interface
> > ==================
> >
> > In principle the driver bases on v4l2 memory-to-memory framework:
> > it provides a single video node and each opened file handle gets its own
> > private context with separate
> > buffer queues. Each context consist of 2 buffer queues: OUTPUT (for source
> > buffers, i.e. raw video
> > frames) and CAPTURE (for destination buffers, i.e. encoded video frames).
> >
> > ==============================
> > VPU (Video Processor Unit)
> > ==============================
> > The VPU driver for hw video codec embedded in Mediatek's MT8173 SOCs.
> > It is able to handle video decoding/encoding in a range of formats.
> > The driver provides with VPU firmware download, memory management and the
> > communication interface between CPU and VPU.
> > For VPU initialization, it will create virtual memory for CPU access and
> > physical address for VPU hw device access.
> > When a decode/encode instance opens a device node, vpu driver will download
> > vpu firmware to the device.
> > A decode/encode instant will decode/encode a frame using VPU interface to
> > interrupt vpu to handle decoding/encoding jobs.
> >
> > Please have a look at the code and comments will be very much appreciated.
>
> I build this using my daily build setup and got a bunch of errors and warnings
> from both the compiler (when this driver is compile-tested on a 32 bit arch)
> and from sparse/smatch.
>
> Can you fix these?
Our driver only support for ARM/ARM64 architecture.
I will add
MTK_IOMMU [=y] && (ARM || ARM64) to Kconfig for VIDEO_MEDIATEK_VCODEC.
And we will fix compiler warning.
best regards,
Tiffany
>
> linux-git-i686: WARNINGS
>
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c: In
> function 'load_requested_vpu':
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:498:117:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:498:117:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 5 has type 'size_t {aka unsigned int}' [-Wformat=]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:501:410:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/venc_vpu_if.c:
> In function 'vpu_enc_ipi_handler':
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/venc_vpu_if.c:40:30:
> warning: cast to pointer from integer of different size
> [-Wint-to-pointer-cast]
> struct venc_vpu_inst *vpu = (struct venc_vpu_inst *)msg->venc_inst;
> ^
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:
> In function 'mtk_venc_worker':
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:1046:43:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 7 has type 'size_t {aka unsigned int}' [-Wformat=]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:1046:43:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 10 has type 'size_t {aka unsigned int}' [-Wformat=]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:1046:43:
> warning: format '%lx' expects argument of type 'long unsigned int', but
> argument 13 has type 'size_t {aka unsigned int}' [-Wformat=]
>
> Tip: use %zu or %zx for size_t.
>
> sparse: ERRORS
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:261:24:
> warning: incorrect type in assignment (different base types)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/venc/venc_vp8_if.c:476:23:
> warning: symbol 'get_vp8_enc_comm_if' was not declared. Should it be static?
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:237:6:
> warning: symbol 'vpu_clock_disable' was not declared. Should it be static?
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:250:5:
> warning: symbol 'vpu_clock_enable' was not declared. Should it be static?
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:436:54:
> warning: incorrect type in return expression (different address spaces)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:504:14:
> warning: incorrect type in assignment (different address spaces)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:710:26:
> warning: cast removes address space of expression
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/venc/venc_h264_if.c:674:23:
> warning: symbol 'get_h264_enc_comm_if' was not declared. Should it be static?
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:804:41:
> warning: Using plain integer as NULL pointer
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:905:25:
> warning: Using plain integer as NULL pointer
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:989:50:
> warning: Using plain integer as NULL pointer
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:133:15:
> error: undefined identifier 'kzalloc'
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:206:9:
> error: undefined identifier 'kfree'
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:228:9:
> error: undefined identifier 'kfree'
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:548:6:
> warning: 'vpu_fw' may be used uninitialized in this function
> [-Wmaybe-uninitialized]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:133:8:
> error: implicit declaration of function 'kzalloc'
> [-Werror=implicit-function-declaration]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:133:6:
> warning: assignment makes pointer from integer without a cast
> [-Wint-conversion]
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:206:2:
> error: implicit declaration of function 'kfree'
> [-Werror=implicit-function-declaration]
>
> smatch: ERRORS
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c:921
> mtk_venc_encode_header() warn: inconsistent indenting
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:397
> vpu_wdt_reg_handler() warn: variable dereferenced before check 'vpu' (see
> line 395)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vpu/mtk_vpu.c:398
> vpu_wdt_reg_handler() error: we previously assumed 'vpu' could be null (see
> line 397)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:142
> fops_vcodec_open() error: we previously assumed 'ctx' could be null (see
> line 134)
> /home/hans/work/build/media-git/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c:363
> mtk_vcodec_probe() warn: passing zero to 'PTR_ERR'
>
> Thanks!
>
> Hans
