linux-kernel - Re: [PATCH 3/3] drm/mediatek: dsi: Add dsi cmdq

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Message-ID: <de5e5267b26191b99874cca582ca9dcb44ac85fa.camel@mediatek.com>
Date:   Fri, 16 Jun 2023 06:24:41 +0000
From:   Shuijing Li (李水静) 
        <Shuijing.Li@...iatek.com>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>,
        Jitao Shi (石记涛) <jitao.shi@...iatek.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        Xinlei Lee (李昕磊) 
        <Xinlei.Lee@...iatek.com>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Rex-BC Chen (陳柏辰) 
        <Rex-BC.Chen@...iatek.com>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: Re: [PATCH 3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel
 initial code

Hi Rex-BC,

[2/3] is to add the driver data of 8188, [3/3] is the common content of
8183,8186 and 8188. So we think it should be divided into two patches.

BRs,
Shuijing

On Thu, 2023-04-13 at 07:27 +0000, Rex-BC Chen (陳柏辰) wrote:
> Hello Xinlei,
> 
> IMO, [2/3] is weird because the driver_data for mt8186 and mt8188 are
> the same in [2/3]. So I think [2/3] coulde be squashed into this
> patch.
> 
> BRs,
> Bo-Chen
> 
> On Thu, 2023-04-13 at 14:09 +0800, xinlei.lee@...iatek.com wrote:
> > From: Xinlei Lee <xinlei.lee@...iatek.com>
> > 
> > For mt8188, add dsi cmdq reg control to send long packets to panel
> > initialization.
> > 
> > Signed-off-by: Xinlei Lee <xinlei.lee@...iatek.com>
> > Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_dsi.c | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > index 500a3054282d..cbfe5df4647c 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> > @@ -86,6 +86,7 @@
> >  
> >  #define DSI_CMDQ_SIZE		0x60
> >  #define CMDQ_SIZE			0x3f
> > +#define CMDQ_SIZE_SEL			BIT(15)
> >  
> >  #define DSI_HSTX_CKL_WC		0x64
> >  
> > @@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {
> >  	const u32 reg_cmdq_off;
> >  	bool has_shadow_ctl;
> >  	bool has_size_ctl;
> > +	bool cmdq_long_packet_ctl;
> >  };
> >  
> >  struct mtk_dsi {
> > @@ -965,6 +967,11 @@ static u32 mtk_dsi_recv_cnt(u8 type, u8
> > *read_data)
> >  	return 0;
> >  }
> >  
> > +static void mtk_dsi_cmd_packet_ctl(struct mtk_dsi *dsi)
> > +{
> > +	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
> > +}
> > +
> >  static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct
> > mipi_dsi_msg *msg)
> >  {
> >  	const char *tx_buf = msg->tx_buf;
> > @@ -996,6 +1003,8 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi,
> > const struct mipi_dsi_msg *msg)
> >  
> >  	mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
> >  	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
> > +	if (dsi->driver_data->cmdq_long_packet_ctl)
> > +		mtk_dsi_cmd_packet_ctl(dsi);
> >  }
> >  
> >  static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
> > @@ -1200,18 +1209,21 @@ static const struct mtk_dsi_driver_data
> > mt8183_dsi_driver_data = {
> >  	.reg_cmdq_off = 0x200,
> >  	.has_shadow_ctl = true,
> >  	.has_size_ctl = true,
> > +	.cmdq_long_packet_ctl = false,
> >  };
> >  
> >  static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
> >  	.reg_cmdq_off = 0xd00,
> >  	.has_shadow_ctl = true,
> >  	.has_size_ctl = true,
> > +	.cmdq_long_packet_ctl = false,
> >  };
> >  
> >  static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
> >  	.reg_cmdq_off = 0xd00,
> >  	.has_shadow_ctl = true,
> >  	.has_size_ctl = true,
> > +	.cmdq_long_packet_ctl = true,
> >  };
> >  
> >  static const struct of_device_id mtk_dsi_of_match[] = {