linux-kernel - Re: [PATCH v2 05/12] drm/rockchip: vop2: Set YUV/RGB overlay mode

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Date:   Wed, 29 Nov 2023 14:52:55 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     Sascha Hauer <s.hauer@...gutronix.de>, Andy Yan <andyshrk@....com>
Cc:     heiko@...ech.de, hjc@...k-chips.com,
        dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, sebastian.reichel@...labora.com,
        kever.yang@...k-chips.com, chris.obbard@...labora.com
Subject: Re: [PATCH v2 05/12] drm/rockchip: vop2: Set YUV/RGB overlay mode

Hi Sasha:

On 11/27/23 22:16, Sascha Hauer wrote:
> On Wed, Nov 22, 2023 at 08:54:38PM +0800, Andy Yan wrote:
>> From: Andy Yan <andy.yan@...k-chips.com>
>>
>> Set overlay mode register according to the
>> output mode is yuv or rgb.
>>
>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>> ---
>>
>> (no changes since v1)
>>
>>   drivers/gpu/drm/rockchip/rockchip_drm_drv.h  |  1 +
>>   drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 19 ++++++++++++++++---
>>   2 files changed, 17 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> index 3d8ab2defa1b..7a58c5c9d4ec 100644
>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
>> @@ -51,6 +51,7 @@ struct rockchip_crtc_state {
>>   	u32 bus_format;
>>   	u32 bus_flags;
>>   	int color_space;
>> +	bool yuv_overlay;
> This struct already contains a bool type variable. Please add this one
> next to it to keep the struct size smaller.


Okay, will do.

>
>>   };
>>   #define to_rockchip_crtc_state(s) \
>>   		container_of(s, struct rockchip_crtc_state, base)
>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> index a019cc9bbd54..b32a291c5caa 100644
>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> @@ -1612,6 +1612,8 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc,
>>   
>>   	vop2->enable_count++;
>>   
>> +	vcstate->yuv_overlay = is_yuv_output(vcstate->bus_format);
>> +
>>   	vop2_crtc_enable_irq(vp, VP_INT_POST_BUF_EMPTY);
>>   
>>   	polflags = 0;
>> @@ -1639,7 +1641,7 @@ static void vop2_crtc_atomic_enable(struct drm_crtc *crtc,
>>   	if (vop2_output_uv_swap(vcstate->bus_format, vcstate->output_mode))
>>   		dsp_ctrl |= RK3568_VP_DSP_CTRL__DSP_RB_SWAP;
>>   
>> -	if (is_yuv_output(vcstate->bus_format))
>> +	if (vcstate->yuv_overlay)
>>   		dsp_ctrl |= RK3568_VP_DSP_CTRL__POST_DSP_OUT_R2Y;
>>   
>>   	vop2_dither_setup(crtc, &dsp_ctrl);
>> @@ -1948,10 +1950,12 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp)
>>   	u16 hdisplay;
>>   	u32 bg_dly;
>>   	u32 pre_scan_dly;
>> +	u32 ovl_ctrl;
>>   	int i;
>>   	struct vop2_video_port *vp0 = &vop2->vps[0];
>>   	struct vop2_video_port *vp1 = &vop2->vps[1];
>>   	struct vop2_video_port *vp2 = &vop2->vps[2];
>> +	struct rockchip_crtc_state *vcstate = to_rockchip_crtc_state(vp->crtc.state);
>>   
>>   	adjusted_mode = &vp->crtc.state->adjusted_mode;
>>   	hsync_len = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
>> @@ -1964,7 +1968,14 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp)
>>   	pre_scan_dly = ((bg_dly + (hdisplay >> 1) - 1) << 16) | hsync_len;
>>   	vop2_vp_write(vp, RK3568_VP_PRE_SCAN_HTIMING, pre_scan_dly);
>>   
>> -	vop2_writel(vop2, RK3568_OVL_CTRL, 0);
>> +	ovl_ctrl = vop2_readl(vop2, RK3568_OVL_CTRL);
>> +	if (vcstate->yuv_overlay)
>> +		ovl_ctrl |= BIT(vp->id);
>> +	else
>> +		ovl_ctrl &= ~BIT(vp->id);
> Some
>
> #define RK3568_OVL_CTRL__YUV_MODE(vp)	BIT(vp)
>
> Would be nice.


Okay, will do.

>> +
>> +	vop2_writel(vop2, RK3568_OVL_CTRL, ovl_ctrl);
> Is it necessary to write this register twice?

I don't think so. Just follow the original code write it here.

Anyway, I will just write once in next version.


And would you please check my response about debugfs patch[0] when it is convenient for you?

I want to know what you think, and prepare the next version.


[0]https://patchwork.kernel.org/project/dri-devel/patch/20231122125601.3455031-1-andyshrk@163.com/

>
>> +
>>   	port_sel = vop2_readl(vop2, RK3568_OVL_PORT_SEL);
>>   	port_sel &= RK3568_OVL_PORT_SEL__SEL_PORT;
>>   
>> @@ -2036,9 +2047,11 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp)
>>   		layer_sel |= RK3568_OVL_LAYER_SEL__LAYER(nlayer + ofs, 5);
>>   	}
>>   
>> +	ovl_ctrl |= RK3568_OVL_CTRL__LAYERSEL_REGDONE_IMD;
>> +
>>   	vop2_writel(vop2, RK3568_OVL_LAYER_SEL, layer_sel);
>>   	vop2_writel(vop2, RK3568_OVL_PORT_SEL, port_sel);
>> -	vop2_writel(vop2, RK3568_OVL_CTRL, RK3568_OVL_CTRL__LAYERSEL_REGDONE_IMD);
>> +	vop2_writel(vop2, RK3568_OVL_CTRL, ovl_ctrl);
> Sascha
>