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Message-ID: <CAAOTY_8EScidYVri=fn+sdteyD1TGSZ4AnYkp7kz2RozriSk=A@mail.gmail.com>
Date: Thu, 2 Apr 2020 20:49:50 +0800
From: Chun-Kuang Hu <chunkuang.hu@...nel.org>
To: Matthias Brugger <matthias.bgg@...il.com>
Cc: Chunfeng Yun <chunfeng.yun@...iatek.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Kishon Vijay Abraham I <kishon@...com>,
linux-kernel@...r.kernel.org,
DRI Development <dri-devel@...ts.freedesktop.org>,
linux-mediatek@...ts.infradead.org, CK Hu <ck.hu@...iatek.com>
Subject: Re: [PATCH v3 1/4] drm/mediatek: Move tz_disabled from mtk_hdmi_phy
to mtk_hdmi driver
Hi, Matthias:
Matthias Brugger <matthias.bgg@...il.com> 於 2020年4月1日 週三 下午11:53寫道：
>
>
>
> On 01/04/2020 04:16, Chunfeng Yun wrote:
> > On Tue, 2020-03-31 at 23:57 +0800, Chun-Kuang Hu wrote:
> >> From: CK Hu <ck.hu@...iatek.com>
> >>
> >> tz_disabled is used to control mtk_hdmi output signal, but this variable
> >> is stored in mtk_hdmi_phy and mtk_hdmi_phy does not use it. So move
> >> tz_disabled to mtk_hdmi where it's used.
> >>
> >> Signed-off-by: CK Hu <ck.hu@...iatek.com>
> >> Signed-off-by: Chun-Kuang Hu <chunkuang.hu@...nel.org>
> >> ---
> >> drivers/gpu/drm/mediatek/mtk_hdmi.c | 22 ++++++++++++++++---
> >> drivers/gpu/drm/mediatek/mtk_hdmi_phy.h | 1 -
> >> .../gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c | 1 -
> >> 3 files changed, 19 insertions(+), 5 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> >> index 5e4a4dbda443..878433c09c9b 100644
> >> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> >> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> >> @@ -144,11 +144,16 @@ struct hdmi_audio_param {
> >> struct hdmi_codec_params codec_params;
> >> };
> >>
> >> +struct mtk_hdmi_conf {
> >> + bool tz_disabled;
> >> +};
> >> +
> >> struct mtk_hdmi {
> >> struct drm_bridge bridge;
> >> struct drm_bridge *next_bridge;
> >> struct drm_connector conn;
> >> struct device *dev;
> >> + const struct mtk_hdmi_conf *conf;
> >> struct phy *phy;
> >> struct device *cec_dev;
> >> struct i2c_adapter *ddc_adpt;
> >> @@ -230,7 +235,6 @@ static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
> >> static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
> >> {
> >> struct arm_smccc_res res;
> >> - struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(hdmi->phy);
> >>
> >> /*
> >> * MT8173 HDMI hardware has an output control bit to enable/disable HDMI
> >> @@ -238,7 +242,7 @@ static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
> >> * The ARM trusted firmware provides an API for the HDMI driver to set
> >> * this control bit to enable HDMI output in supervisor mode.
> >> */
> >> - if (hdmi_phy->conf && hdmi_phy->conf->tz_disabled)
> >> + if (hdmi->conf->tz_disabled)
>
> Wouldn't we need to check:
> if (hdmi->conf && hdmi->conf->tz_disabled)
My design is: hdmi->conf would not be NULL.
>
> >> regmap_update_bits(hdmi->sys_regmap,
> >> hdmi->sys_offset + HDMI_SYS_CFG20,
> >> 0x80008005, enable ? 0x80000005 : 0x8000);
> >> @@ -1688,6 +1692,7 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
> >> return -ENOMEM;
> >>
> >> hdmi->dev = dev;
> >> + hdmi->conf = of_device_get_match_data(dev);
> >>
> >> ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev);
> >> if (ret)
> >> @@ -1765,8 +1770,19 @@ static int mtk_hdmi_resume(struct device *dev)
> >> static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops,
> >> mtk_hdmi_suspend, mtk_hdmi_resume);
> >>
> >> +static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
> >> + .tz_disabled = true,
> >> +};
> >> +
> >> +static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8173;
> >> +
> >> static const struct of_device_id mtk_drm_hdmi_of_ids[] = {
> >> - { .compatible = "mediatek,mt8173-hdmi", },
> >> + { .compatible = "mediatek,mt2701-hdmi",
> >> + .data = &mtk_hdmi_conf_mt2701,
> >> + },
> >> + { .compatible = "mediatek,mt8173-hdmi",
> >> + .data = &mtk_hdmi_conf_mt8173,
>
> We don't have any data? Then we should set data to NULL instead.
My design is data would not be NULL, so I need not to check whether it
is NULL in driver.
Regards,
CK
>
> Regards,
> Matthias
>
> >> + },
> >> {}
> >> };
> >>
> >> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> >> index 2d8b3182470d..fc1c2efd1128 100644
> >> --- a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> >> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.h
> >> @@ -20,7 +20,6 @@
> >> struct mtk_hdmi_phy;
> >>
> >> struct mtk_hdmi_phy_conf {
> >> - bool tz_disabled;
> >> unsigned long flags;
> >> const struct clk_ops *hdmi_phy_clk_ops;
> >> void (*hdmi_phy_enable_tmds)(struct mtk_hdmi_phy *hdmi_phy);
> >> diff --git a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> >> index d3cc4022e988..99fe05cd3598 100644
> >> --- a/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> >> +++ b/drivers/gpu/drm/mediatek/mtk_mt2701_hdmi_phy.c
> >> @@ -237,7 +237,6 @@ static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
> >> }
> >>
> >> struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
> >> - .tz_disabled = true,
> >> .flags = CLK_SET_RATE_GATE,
> >> .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
> >> .hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
> >
> > Reviewed-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> >
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