From: "LIANKUN YANG (杨连坤)" <Liankun.Yang@mediatek.com>
To: "robh+dt@kernel.org" <robh+dt@kernel.org>,
"krzk@kernel.org" <krzk@kernel.org>,
"Chunfeng Yun (云春峰)" <Chunfeng.Yun@mediatek.com>,
"chunkuang.hu@kernel.org" <chunkuang.hu@kernel.org>,
"Mac Shen (沈俊)" <Mac.Shen@mediatek.com>,
"tzimmermann@suse.de" <tzimmermann@suse.de>,
"mripard@kernel.org" <mripard@kernel.org>,
"Jitao Shi (石记涛)" <jitao.shi@mediatek.com>,
"daniel@ffwll.ch" <daniel@ffwll.ch>,
"p.zabel@pengutronix.de" <p.zabel@pengutronix.de>,
"maarten.lankhorst@linux.intel.com"
<maarten.lankhorst@linux.intel.com>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
"kishon@kernel.org" <kishon@kernel.org>,
"airlied@gmail.com" <airlied@gmail.com>,
"krzysztof.kozlowski+dt@linaro.org"
<krzysztof.kozlowski+dt@linaro.org>,
"vkoul@kernel.org" <vkoul@kernel.org>,
"matthias.bgg@gmail.com" <matthias.bgg@gmail.com>,
Project_Global_Chrome_Upstream_Group
<Project_Global_Chrome_Upstream_Group@mediatek.com>,
"angelogioacchino.delregno@collabora.com"
<angelogioacchino.delregno@collabora.com>
Cc: "dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-mediatek@lists.infradead.org"
<linux-mediatek@lists.infradead.org>,
"linux-phy@lists.infradead.org" <linux-phy@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: Re: [PATCH v2 1/2] Add write DP phyd register from parse dts
Date: Mon, 13 May 2024 14:21:41 +0000 [thread overview]
Message-ID: <5745c652790b9a917a39d941065f3d9c53725b1c.camel@mediatek.com> (raw)
In-Reply-To: <93690c52-7da7-4fee-9b58-6087b3fb1d71@kernel.org>
On Mon, 2024-05-13 at 08:38 +0200, Krzysztof Kozlowski wrote:
>
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
> On 10/05/2024 13:04, Liankun Yang wrote:
> > During the testing phase, screen flickering is observed when
> > using displayport for screen casting. Relevant SSC register
> parameters
> > are set in dts to address the screen flickering issue effectively
> and
> > improve compatibility with different devices by adjusting the SSC
> gear.
> >
> > Obtaining the DPTX node, parsing the dts to obtain PHY register
> address
> > and value can adapt to settings of different manufacturers
> projects.
> >
> > Changeds in v2:
> > - Optimized method of writing to DP PHY register
> > https://patchwork.kernel.org/project/linux-mediatek/patch/
> > 20240403040517.3279-1-liankun.yang@mediatek.com/
> >
> > Signed-off-by: Liankun Yang <liankun.yang@mediatek.com>
> > ---
> > drivers/phy/mediatek/phy-mtk-dp.c | 37
> +++++++++++++++++++++++++++++++
> > 1 file changed, 37 insertions(+)
> >
> > diff --git a/drivers/phy/mediatek/phy-mtk-dp.c
> b/drivers/phy/mediatek/phy-mtk-dp.c
> > index d7024a144335..ce78112d5938 100644
> > --- a/drivers/phy/mediatek/phy-mtk-dp.c
> > +++ b/drivers/phy/mediatek/phy-mtk-dp.c
> > @@ -28,6 +28,10 @@
> > #define MTK_DP_PHY_DIG_SW_RST(PHY_OFFSET + 0x38)
> > #define DP_GLB_SW_RST_PHYDBIT(0)
> >
> > +#define MTK_DP_PHY_DIG_GLB_DA_REG_14(PHY_OFFSET + 0xD8)
> > +#define XTP_GLB_TXPLL_SSC_DELTA_RBR_DEFAULTGENMASK(15, 0)
> > +#define XTP_GLB_TXPLL_SSC_DELTA_HBR_DEFAULTGENMASK(31, 16)
> > +
> > #define MTK_DP_LANE0_DRIVING_PARAM_3(PHY_OFFSET + 0x138)
> > #define MTK_DP_LANE1_DRIVING_PARAM_3(PHY_OFFSET + 0x238)
> > #define MTK_DP_LANE2_DRIVING_PARAM_3(PHY_OFFSET + 0x338)
> > @@ -78,10 +82,39 @@
> > #define DRIVING_PARAM_8_DEFAULT(XTP_LN_TX_LCTXCP1_SW2_PRE1_DEFAULT
> | \
> > XTP_LN_TX_LCTXCP1_SW3_PRE0_DEFAULT)
> >
> > +#define SSC_SETTING"dp-ssc-setting"
> > +#define RG_XTP_GLB_TXPLL_SSC_DELTA_HBR"ssc-delta-hbr"
> > +
> > struct mtk_dp_phy {
> > struct regmap *regs;
> > +struct device *dev;
> > };
> >
> > +static int mtk_dp_set_ssc_config(struct phy *phy, struct
> mtk_dp_phy *dp_phy)
> > +{
> > +int ret;
> > +u32 read_value = 0, reg_mask = 0;
> > +struct device_node *ssc_node = NULL;
> > +
> > +ssc_node = of_find_node_by_name(dp_phy->dev->of_node,
> SSC_SETTING);
>
> No, really. Node name can change.
>
> Best regards,
> Krzysztof
>
Thank you for your comment.
I will change the node name.
Best regards.
Liankun yang
next prev parent reply other threads:[~2024-05-13 14:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 11:04 [PATCH v2 0/2] Add PHY-dp bindings Liankun Yang
2024-05-10 11:04 ` [PATCH v2 1/2] Add write DP phyd register from parse dts Liankun Yang
2024-05-13 6:38 ` Krzysztof Kozlowski
2024-05-13 14:21 ` LIANKUN YANG (杨连坤) [this message]
2024-05-13 13:11 ` AngeloGioacchino Del Regno
2024-05-13 14:26 ` LIANKUN YANG (杨连坤)
2024-05-10 11:04 ` [PATCH v2 2/2] Add dp PHY dt-bindings Liankun Yang
2024-05-10 12:48 ` Rob Herring
2024-05-13 14:06 ` LIANKUN YANG (杨连坤)
2024-05-13 6:37 ` Krzysztof Kozlowski
2024-05-13 14:15 ` LIANKUN YANG (杨连坤)
2024-05-13 14:17 ` Krzysztof Kozlowski
2024-05-13 14:20 ` Krzysztof Kozlowski
2024-05-14 4:43 ` LIANKUN YANG (杨连坤)
2024-05-10 11:27 ` [PATCH v2 0/2] Add PHY-dp bindings Jani Nikula
2024-05-13 13:57 ` LIANKUN YANG (杨连坤)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5745c652790b9a917a39d941065f3d9c53725b1c.camel@mediatek.com \
--to=liankun.yang@mediatek.com \
--cc=Chunfeng.Yun@mediatek.com \
--cc=Mac.Shen@mediatek.com \
--cc=Project_Global_Chrome_Upstream_Group@mediatek.com \
--cc=airlied@gmail.com \
--cc=angelogioacchino.delregno@collabora.com \
--cc=chunkuang.hu@kernel.org \
--cc=conor+dt@kernel.org \
--cc=daniel@ffwll.ch \
--cc=devicetree@vger.kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=jitao.shi@mediatek.com \
--cc=kishon@kernel.org \
--cc=krzk@kernel.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-phy@lists.infradead.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=matthias.bgg@gmail.com \
--cc=mripard@kernel.org \
--cc=p.zabel@pengutronix.de \
--cc=robh+dt@kernel.org \
--cc=tzimmermann@suse.de \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).