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Date: Mon, 5 Oct 2020 12:32:30 +0900
From: Alexandre Courbot <acourbot@...omium.org>
To: Tiffany Lin <tiffany.lin@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Tomasz Figa <tfiga@...omium.org>
Cc: Hans Verkuil <hverkuil-cisco@...all.nl>,
Linux Media Mailing List <linux-media@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v2] media: mtk-vcodec: fix builds when remoteproc is disabled
On Sun, Oct 4, 2020 at 9:22 PM Alexandre Courbot <acourbot@...omium.org> 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.ailus@...ux.intel.com>
> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
Forgot to send the changelog, so here it is:
Changes since v1:
* Added Acked-by from Randy.
* Fixed typo in Kconfig description.
> ---
> drivers/media/platform/Kconfig | 10 +--
> .../media/platform/mtk-vcodec/mtk_vcodec_fw.c | 72 ++++++++++++-------
> 2 files changed, 54 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index a3cb104956d5..98eb62e49ec2 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -253,14 +253,16 @@ 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
> select VIDEOBUF2_DMA_CONTIG
> select V4L2_MEM2MEM_DEV
> - select VIDEO_MEDIATEK_VPU
> - select 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.
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.c
> index 6c2a2568d844..23a80027a8fb 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw.c
> @@ -13,6 +13,7 @@ struct mtk_vcodec_fw_ops {
> mtk_vcodec_ipi_handler handler, const char *name, void *priv);
> int (*ipi_send)(struct mtk_vcodec_fw *fw, int id, void *buf,
> unsigned int len, unsigned int wait);
> + void (*release)(struct mtk_vcodec_fw *fw);
> };
>
> struct mtk_vcodec_fw {
> @@ -22,6 +23,8 @@ struct mtk_vcodec_fw {
> struct mtk_scp *scp;
> };
>
> +#if IS_ENABLED(CONFIG_VIDEO_MEDIATEK_VPU)
> +
> static int mtk_vcodec_vpu_load_firmware(struct mtk_vcodec_fw *fw)
> {
> return vpu_load_firmware(fw->pdev);
> @@ -64,6 +67,27 @@ static int mtk_vcodec_vpu_ipi_send(struct mtk_vcodec_fw *fw, int id, void *buf,
> return vpu_ipi_send(fw->pdev, id, buf, len);
> }
>
> +static void mtk_vcodec_vpu_release(struct mtk_vcodec_fw *fw)
> +{
> + put_device(&fw->pdev->dev);
> +}
> +
> +static void mtk_vcodec_vpu_reset_handler(void *priv)
> +{
> + struct mtk_vcodec_dev *dev = priv;
> + struct mtk_vcodec_ctx *ctx;
> +
> + mtk_v4l2_err("Watchdog timeout!!");
> +
> + mutex_lock(&dev->dev_mutex);
> + list_for_each_entry(ctx, &dev->ctx_list, list) {
> + ctx->state = MTK_STATE_ABORT;
> + mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ABORT",
> + ctx->id);
> + }
> + mutex_unlock(&dev->dev_mutex);
> +}
> +
> static const struct mtk_vcodec_fw_ops mtk_vcodec_vpu_msg = {
> .load_firmware = mtk_vcodec_vpu_load_firmware,
> .get_vdec_capa = mtk_vcodec_vpu_get_vdec_capa,
> @@ -71,8 +95,13 @@ static const struct mtk_vcodec_fw_ops mtk_vcodec_vpu_msg = {
> .map_dm_addr = mtk_vcodec_vpu_map_dm_addr,
> .ipi_register = mtk_vcodec_vpu_set_ipi_register,
> .ipi_send = mtk_vcodec_vpu_ipi_send,
> + .release = mtk_vcodec_vpu_release,
> };
>
> +#endif /* IS_ENABLED(CONFIG_VIDEO_MEDIATEK_VPU) */
> +
> +#if IS_ENABLED(CONFIG_MTK_SCP)
> +
> static int mtk_vcodec_scp_load_firmware(struct mtk_vcodec_fw *fw)
> {
> return rproc_boot(scp_get_rproc(fw->scp));
> @@ -107,6 +136,11 @@ static int mtk_vcodec_scp_ipi_send(struct mtk_vcodec_fw *fw, int id, void *buf,
> return scp_ipi_send(fw->scp, id, buf, len, wait);
> }
>
> +static void mtk_vcodec_scp_release(struct mtk_vcodec_fw *fw)
> +{
> + scp_put(fw->scp);
> +}
> +
> static const struct mtk_vcodec_fw_ops mtk_vcodec_rproc_msg = {
> .load_firmware = mtk_vcodec_scp_load_firmware,
> .get_vdec_capa = mtk_vcodec_scp_get_vdec_capa,
> @@ -114,23 +148,10 @@ static const struct mtk_vcodec_fw_ops mtk_vcodec_rproc_msg = {
> .map_dm_addr = mtk_vcodec_vpu_scp_dm_addr,
> .ipi_register = mtk_vcodec_scp_set_ipi_register,
> .ipi_send = mtk_vcodec_scp_ipi_send,
> + .release = mtk_vcodec_scp_release,
> };
>
> -static void mtk_vcodec_reset_handler(void *priv)
> -{
> - struct mtk_vcodec_dev *dev = priv;
> - struct mtk_vcodec_ctx *ctx;
> -
> - mtk_v4l2_err("Watchdog timeout!!");
> -
> - mutex_lock(&dev->dev_mutex);
> - list_for_each_entry(ctx, &dev->ctx_list, list) {
> - ctx->state = MTK_STATE_ABORT;
> - mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ABORT",
> - ctx->id);
> - }
> - mutex_unlock(&dev->dev_mutex);
> -}
> +#endif /* IS_ENABLED(CONFIG_MTK_SCP) */
>
> struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
> enum mtk_vcodec_fw_type type,
> @@ -143,16 +164,22 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
>
> switch (type) {
> case VPU:
> +#if IS_ENABLED(CONFIG_VIDEO_MEDIATEK_VPU)
> ops = &mtk_vcodec_vpu_msg;
> fw_pdev = vpu_get_plat_device(dev->plat_dev);
> if (!fw_pdev) {
> mtk_v4l2_err("firmware device is not ready");
> return ERR_PTR(-EINVAL);
> }
> - vpu_wdt_reg_handler(fw_pdev, mtk_vcodec_reset_handler,
> + vpu_wdt_reg_handler(fw_pdev, mtk_vcodec_vpu_reset_handler,
> dev, rst_id);
> break;
> +#else
> + mtk_v4l2_err("no VPU support in this kernel");
> + return ERR_PTR(-ENODEV);
> +#endif
> case SCP:
> +#if IS_ENABLED(CONFIG_MTK_SCP)
> ops = &mtk_vcodec_rproc_msg;
> scp = scp_get(dev->plat_dev);
> if (!scp) {
> @@ -160,6 +187,10 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_select(struct mtk_vcodec_dev *dev,
> return ERR_PTR(-EPROBE_DEFER);
> }
> break;
> +#else
> + mtk_v4l2_err("no SCP support in this kernel");
> + return ERR_PTR(-ENODEV);
> +#endif
> default:
> mtk_v4l2_err("invalid vcodec fw type");
> return ERR_PTR(-EINVAL);
> @@ -180,14 +211,7 @@ EXPORT_SYMBOL_GPL(mtk_vcodec_fw_select);
>
> void mtk_vcodec_fw_release(struct mtk_vcodec_fw *fw)
> {
> - switch (fw->type) {
> - case VPU:
> - put_device(&fw->pdev->dev);
> - break;
> - case SCP:
> - scp_put(fw->scp);
> - break;
> - }
> + fw->ops->release(fw);
> }
> EXPORT_SYMBOL_GPL(mtk_vcodec_fw_release);
>
> --
> 2.28.0.806.g8561365e88-goog
>
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