On 10/11/20 10:35 PM, Alexandre Courbot wrote:
> The addition of MT8183 support added a dependency on the SCP remoteproc
> module. However the initial patch used the "select" Kconfig directive,
> which may result in the SCP module to not be compiled if remoteproc was
> disabled. In such a case, mtk-vcodec would try to link against
> non-existent SCP symbols. "select" was clearly misused here as explained
> in kconfig-language.txt.
>
> Replace this by a "depends" directive on at least one of the VPU and
> SCP modules, to allow the driver to be compiled as long as one of these
> is enabled, and adapt the code to support this new scenario.
>
> Also adapt the Kconfig text to explain the extra requirements for MT8173
> and MT8183.
>
> Reported-by: Sakari Ailus <sakari.ai...@linux.intel.com>
> Signed-off-by: Alexandre Courbot <acour...@chromium.org>
> Acked-by: Randy Dunlap <rdun...@infradead.org> # build-tested
That Ack applied to v2. I have not tested nor acked this version of the patch.
> Acked-by: Sakari Ailus <sakari.ai...@linux.intel.com>
> ---
> drivers/media/platform/Kconfig | 22 +++++++++++++++----
> drivers/media/platform/mtk-vcodec/Makefile | 10 +++++++--
> .../platform/mtk-vcodec/mtk_vcodec_fw_priv.h | 18 +++++++++++++++
> 3 files changed, 44 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index a3cb104956d5..457b6c39ddc0 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -253,18 +253,32 @@ config VIDEO_MEDIATEK_VCODEC
> depends on MTK_IOMMU || COMPILE_TEST
> depends on VIDEO_DEV && VIDEO_V4L2
> depends on ARCH_MEDIATEK || COMPILE_TEST
> + depends on VIDEO_MEDIATEK_VPU || MTK_SCP
> + # The two following lines ensure we have the same state ("m" or "y") as
> + # our dependencies, to avoid missing symbols during link.
> + depends on VIDEO_MEDIATEK_VPU || !VIDEO_MEDIATEK_VPU
> + depends on MTK_SCP || !MTK_SCP
> select VIDEOBUF2_DMA_CONTIG
> select V4L2_MEM2MEM_DEV
> - select VIDEO_MEDIATEK_VPU
> - select MTK_SCP
> + select VIDEO_MEDIATEK_VCODEC_VPU if VIDEO_MEDIATEK_VPU
> + select VIDEO_MEDIATEK_VCODEC_SCP if MTK_SCP
> help
> Mediatek video codec driver provides HW capability to
> - encode and decode in a range of video formats
> - This driver rely on VPU driver to communicate with VPU.
> + encode and decode in a range of video formats on MT8173
> + and MT8183.
> +
> + Note that support for MT8173 requires VIDEO_MEDIATEK_VPU to
> + also be selected. Support for MT8183 depends on MTK_SCP.
>
> To compile this driver as modules, choose M here: the
> modules will be called mtk-vcodec-dec and mtk-vcodec-enc.
>
> +config VIDEO_MEDIATEK_VCODEC_VPU
> + bool
> +
> +config VIDEO_MEDIATEK_VCODEC_SCP
> + bool
> +
> config VIDEO_MEM2MEM_DEINTERLACE
> tristate "Deinterlace support"
> depends on VIDEO_DEV && VIDEO_V4L2
> diff --git a/drivers/media/platform/mtk-vcodec/Makefile
> b/drivers/media/platform/mtk-vcodec/Makefile
> index 6e1ea3a9f052..4618d43dbbc8 100644
> --- a/drivers/media/platform/mtk-vcodec/Makefile
> +++ b/drivers/media/platform/mtk-vcodec/Makefile
> @@ -25,5 +25,11 @@ mtk-vcodec-enc-y := venc/venc_vp8_if.o \
> mtk-vcodec-common-y := mtk_vcodec_intr.o \
> mtk_vcodec_util.o \
> mtk_vcodec_fw.o \
> - mtk_vcodec_fw_vpu.o \
> - mtk_vcodec_fw_scp.o
> +
> +ifneq ($(CONFIG_VIDEO_MEDIATEK_VCODEC_VPU),)
> +mtk-vcodec-common-y += mtk_vcodec_fw_vpu.o
> +endif
> +
> +ifneq ($(CONFIG_VIDEO_MEDIATEK_VCODEC_SCP),)
> +mtk-vcodec-common-y += mtk_vcodec_fw_scp.o
> +endif
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_priv.h
> b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_priv.h
> index 51f1694a7c7d..b41e66185cec 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_priv.h
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_priv.h
> @@ -27,8 +27,26 @@ struct mtk_vcodec_fw_ops {
> void (*release)(struct mtk_vcodec_fw *fw);
> };
>
> +#if IS_ENABLED(CONFIG_VIDEO_MEDIATEK_VCODEC_VPU)
> struct mtk_vcodec_fw *mtk_vcodec_fw_vpu_init(struct mtk_vcodec_dev *dev,
> enum mtk_vcodec_fw_use fw_use);
> +#else
> +static inline struct mtk_vcodec_fw *
> +mtk_vcodec_fw_vpu_init(struct mtk_vcodec_dev *dev,
> + enum mtk_vcodec_fw_use fw_use)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +#endif /* CONFIG_VIDEO_MEDIATEK_VCODEC_VPU */
> +
> +#if IS_ENABLED(CONFIG_VIDEO_MEDIATEK_VCODEC_SCP)
> struct mtk_vcodec_fw *mtk_vcodec_fw_scp_init(struct mtk_vcodec_dev *dev);
> +#else
> +static inline struct mtk_vcodec_fw *
> +mtk_vcodec_fw_scp_init(struct mtk_vcodec_dev *dev)
> +{
> + return ERR_PTR(-ENODEV);
> +}
> +#endif /* CONFIG_VIDEO_MEDIATEK_VCODEC_SCP */
>
> #endif /* _MTK_VCODEC_FW_PRIV_H_ */
>
--
~Randy
Reported-by: Randy Dunlap <rdun...@infradead.org>
