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Message-ID: <02f444d5-9633-3f9c-2d1f-97ce073d1180@collabora.com>
Date: Wed, 29 Sep 2021 14:13:00 +0200
From: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
To: Yong Wu <yong.wu@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Joerg Roedel <joro@...tes.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
David Airlie <airlied@...ux.ie>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Evan Green <evgreen@...omium.org>,
Robin Murphy <robin.murphy@....com>,
Tomasz Figa <tfiga@...omium.org>,
Will Deacon <will.deacon@....com>,
linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
Matthias Kaehlcke <mka@...omium.org>, anan.sun@...iatek.com,
yi.kuo@...iatek.com, acourbot@...omium.org,
linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
Daniel Vetter <daniel@...ll.ch>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Eizan Miyamoto <eizan@...omium.org>,
anthony.huang@...iatek.com,
Frank Wunderlich <frank-w@...lic-files.de>,
Irui Wang <irui.wang@...iatek.com>
Subject: Re: [PATCH v8 09/12] media: mtk-vcodec: Get rid of
mtk_smi_larb_get/put
On 29.09.21 03:37, Yong Wu wrote:
> MediaTek IOMMU has already added the device_link between the consumer
> and smi-larb device. If the vcodec device call the pm_runtime_get_sync,
> the smi-larb's pm_runtime_get_sync also be called automatically.
>
> CC: Tiffany Lin <tiffany.lin@...iatek.com>
> CC: Irui Wang <irui.wang@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> Reviewed-by: Evan Green <evgreen@...omium.org>
> Acked-by: Tiffany Lin <tiffany.lin@...iatek.com>
> Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
> ---
> .../platform/mtk-vcodec/mtk_vcodec_dec_pm.c | 37 +++-------------
> .../platform/mtk-vcodec/mtk_vcodec_drv.h | 3 --
> .../platform/mtk-vcodec/mtk_vcodec_enc.c | 1 -
> .../platform/mtk-vcodec/mtk_vcodec_enc_pm.c | 44 +++----------------
> 4 files changed, 10 insertions(+), 75 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> index 6038db96f71c..d0bf9aa3b29d 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> @@ -8,14 +8,12 @@
> #include <linux/of_address.h>
> #include <linux/of_platform.h>
> #include <linux/pm_runtime.h>
> -#include <soc/mediatek/smi.h>
>
> #include "mtk_vcodec_dec_pm.h"
> #include "mtk_vcodec_util.h"
>
> int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> {
> - struct device_node *node;
> struct platform_device *pdev;
> struct mtk_vcodec_pm *pm;
> struct mtk_vcodec_clk *dec_clk;
> @@ -26,18 +24,7 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> pm = &mtkdev->pm;
> pm->mtkdev = mtkdev;
> dec_clk = &pm->vdec_clk;
> - node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
> - if (!node) {
> - mtk_v4l2_err("of_parse_phandle mediatek,larb fail!");
> - return -1;
> - }
>
> - pdev = of_find_device_by_node(node);
> - of_node_put(node);
> - if (WARN_ON(!pdev)) {
> - return -1;
> - }
> - pm->larbvdec = &pdev->dev;
> pdev = mtkdev->plat_dev;
> pm->dev = &pdev->dev;
>
> @@ -47,14 +34,11 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> dec_clk->clk_info = devm_kcalloc(&pdev->dev,
> dec_clk->clk_num, sizeof(*clk_info),
> GFP_KERNEL);
> - if (!dec_clk->clk_info) {
> - ret = -ENOMEM;
> - goto put_device;
> - }
> + if (!dec_clk->clk_info)
> + return -ENOMEM;
> } else {
> mtk_v4l2_err("Failed to get vdec clock count");
> - ret = -EINVAL;
> - goto put_device;
> + return -EINVAL;
> }
>
> for (i = 0; i < dec_clk->clk_num; i++) {
> @@ -63,29 +47,24 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)
> "clock-names", i, &clk_info->clk_name);
> if (ret) {
> mtk_v4l2_err("Failed to get clock name id = %d", i);
> - goto put_device;
> + return ret;
> }
> clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
> clk_info->clk_name);
> if (IS_ERR(clk_info->vcodec_clk)) {
> mtk_v4l2_err("devm_clk_get (%d)%s fail", i,
> clk_info->clk_name);
> - ret = PTR_ERR(clk_info->vcodec_clk);
> - goto put_device;
> + return PTR_ERR(clk_info->vcodec_clk);
> }
> }
>
> pm_runtime_enable(&pdev->dev);
> return 0;
> -put_device:
> - put_device(pm->larbvdec);
> - return ret;
> }
>
> void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev)
> {
> pm_runtime_disable(dev->pm.dev);
> - put_device(dev->pm.larbvdec);
> }
Now that functions only do 'pm_runtime_disable(dev->pm.dev);' so it will be more
readable to remove the function mtk_vcodec_release_dec_pm
and replace with pm_runtime_disable(dev->pm.dev);
Same for the 'enc' equivalent.
Thanks,
Dafna
>
> int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm)
> @@ -122,11 +101,6 @@ void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm)
> }
> }
>
> - ret = mtk_smi_larb_get(pm->larbvdec);
> - if (ret) {
> - mtk_v4l2_err("mtk_smi_larb_get larbvdec fail %d", ret);
> - goto error;
> - }> return;
>
> error:
> @@ -139,7 +113,6 @@ void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm)
> struct mtk_vcodec_clk *dec_clk = &pm->vdec_clk;
> int i = 0;
>
> - mtk_smi_larb_put(pm->larbvdec);
> for (i = dec_clk->clk_num - 1; i >= 0; i--)
> clk_disable_unprepare(dec_clk->clk_info[i].vcodec_clk);
> }
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> index c6c7672fecfb..64b73dd880ce 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
> @@ -189,10 +189,7 @@ struct mtk_vcodec_clk {
> */
> struct mtk_vcodec_pm {
> struct mtk_vcodec_clk vdec_clk;
> - struct device *larbvdec;
> -
> struct mtk_vcodec_clk venc_clk;
> - struct device *larbvenc;
> struct device *dev;
> struct mtk_vcodec_dev *mtkdev;
> };
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> index 416f356af363..9a1515cf862d 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc.c
> @@ -8,7 +8,6 @@
> #include <media/v4l2-event.h>
> #include <media/v4l2-mem2mem.h>
> #include <media/videobuf2-dma-contig.h>
> -#include <soc/mediatek/smi.h>
> #include <linux/pm_runtime.h>
>
> #include "mtk_vcodec_drv.h"
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> index 1b2e4930ed27..dffb190267ed 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.c
> @@ -8,58 +8,36 @@
> #include <linux/of_address.h>
> #include <linux/of_platform.h>
> #include <linux/pm_runtime.h>
> -#include <soc/mediatek/smi.h>
>
> #include "mtk_vcodec_enc_pm.h"
> #include "mtk_vcodec_util.h"
>
> int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev)
> {
> - struct device_node *node;
> struct platform_device *pdev;
> struct mtk_vcodec_pm *pm;
> struct mtk_vcodec_clk *enc_clk;
> struct mtk_vcodec_clk_info *clk_info;
> int ret = 0, i = 0;
> - struct device *dev;
>
> pdev = mtkdev->plat_dev;
> pm = &mtkdev->pm;
> memset(pm, 0, sizeof(struct mtk_vcodec_pm));
> pm->mtkdev = mtkdev;
> pm->dev = &pdev->dev;
> - dev = &pdev->dev;
> enc_clk = &pm->venc_clk;
>
> - node = of_parse_phandle(dev->of_node, "mediatek,larb", 0);
> - if (!node) {
> - mtk_v4l2_err("no mediatek,larb found");
> - return -ENODEV;
> - }
> - pdev = of_find_device_by_node(node);
> - of_node_put(node);
> - if (!pdev) {
> - mtk_v4l2_err("no mediatek,larb device found");
> - return -ENODEV;
> - }
> - pm->larbvenc = &pdev->dev;
> - pdev = mtkdev->plat_dev;
> - pm->dev = &pdev->dev;
> -
> enc_clk->clk_num = of_property_count_strings(pdev->dev.of_node,
> "clock-names");
> if (enc_clk->clk_num > 0) {
> enc_clk->clk_info = devm_kcalloc(&pdev->dev,
> enc_clk->clk_num, sizeof(*clk_info),
> GFP_KERNEL);
> - if (!enc_clk->clk_info) {
> - ret = -ENOMEM;
> - goto put_larbvenc;
> - }
> + if (!enc_clk->clk_info)
> + return -ENOMEM;
> } else {
> mtk_v4l2_err("Failed to get venc clock count");
> - ret = -EINVAL;
> - goto put_larbvenc;
> + return -EINVAL;
> }
>
> for (i = 0; i < enc_clk->clk_num; i++) {
> @@ -68,29 +46,23 @@ int mtk_vcodec_init_enc_pm(struct mtk_vcodec_dev *mtkdev)
> "clock-names", i, &clk_info->clk_name);
> if (ret) {
> mtk_v4l2_err("venc failed to get clk name %d", i);
> - goto put_larbvenc;
> + return ret;
> }
> clk_info->vcodec_clk = devm_clk_get(&pdev->dev,
> clk_info->clk_name);
> if (IS_ERR(clk_info->vcodec_clk)) {
> mtk_v4l2_err("venc devm_clk_get (%d)%s fail", i,
> clk_info->clk_name);
> - ret = PTR_ERR(clk_info->vcodec_clk);
> - goto put_larbvenc;
> + return PTR_ERR(clk_info->vcodec_clk);
> }
> }
>
> return 0;
> -
> -put_larbvenc:
> - put_device(pm->larbvenc);
> - return ret;
> }
>
> void mtk_vcodec_release_enc_pm(struct mtk_vcodec_dev *mtkdev)
> {
> pm_runtime_disable(mtkdev->pm.dev);
> - put_device(mtkdev->pm.larbvenc);
> }
>
>
> @@ -108,11 +80,6 @@ void mtk_vcodec_enc_clock_on(struct mtk_vcodec_pm *pm)
> }
> }
>
> - ret = mtk_smi_larb_get(pm->larbvenc);
> - if (ret) {
> - mtk_v4l2_err("mtk_smi_larb_get larb3 fail %d", ret);
> - goto clkerr;
> - }
> return;
>
> clkerr:
> @@ -125,7 +92,6 @@ void mtk_vcodec_enc_clock_off(struct mtk_vcodec_pm *pm)
> struct mtk_vcodec_clk *enc_clk = &pm->venc_clk;
> int i = 0;
>
> - mtk_smi_larb_put(pm->larbvenc);
> for (i = enc_clk->clk_num - 1; i >= 0; i--)
> clk_disable_unprepare(enc_clk->clk_info[i].vcodec_clk);
> }
>
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