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Date: Thu, 8 Oct 2020 15:12:37 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Alexandre Courbot <acourbot@...omium.org>,
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: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-mediatek@...ts.infradead.org,
Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v2] media: mtk-vcodec: fix builds when remoteproc is
disabled
On 08/10/2020 15:07, Hans Verkuil wrote:
> Hi Alexandre,
>
> On 04/10/2020 14:22, 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.ailus@...ux.intel.com>
>> Signed-off-by: Alexandre Courbot <acourbot@...omium.org>
>> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
>> ---
>> 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
>
> Close, but no cigar.
>
> If VIDEO_MEDIATEK_VPU=y and MTK_SCP=m, then VIDEO_MEDIATEK_VCODEC can be configured
> to y, and then it won't be able to find the scp_ functions.
>
> To be honest, I'm not sure how to solve this.
Found it. Add this:
depends on MTK_SCP || !MTK_SCP
depends on VIDEO_MEDIATEK_VPU || !VIDEO_MEDIATEK_VPU
Ugly as hell, but it appears to be the correct incantation for this.
Regards,
Hans
>
> Regards,
>
> Hans
>
>> 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);
>>
>>
>
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