linux-kernel - Re: [PATCH] drm/rockchip: vop: Correct RK3399 VOP register fields

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Date:   Tue, 8 Feb 2022 14:05:30 +0100
From:   Andrzej Pietrasiewicz <andrzej.p@...labora.com>
To:     Brian Norris <briannorris@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Heiko Stübner <heiko@...ech.de>
Cc:     Sandy Huang <hjc@...k-chips.com>, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        stable@...r.kernel.org, Mark Yao <markyao0591@...il.com>
Subject: Re: [PATCH] drm/rockchip: vop: Correct RK3399 VOP register fields

Hi Brian,

Sorry about the delay.

W dniu 20.01.2022 o 01:11, Brian Norris pisze:
> Commit 7707f7227f09 ("drm/rockchip: Add support for afbc") switched up
> the rk3399_vop_big[] register windows, but it did so incorrectly.
> 
> The biggest problem is in rk3288_win23_data[] vs.
> rk3368_win23_data[] .format field:
> 
>    RK3288's format: VOP_REG(RK3288_WIN2_CTRL0, 0x7, 1)
>    RK3368's format: VOP_REG(RK3368_WIN2_CTRL0, 0x3, 5)
> 
> Bits 5:6 (i.e., shift 5, mask 0x3) are correct for RK3399, according to
> the TRM.
> 
> There are a few other small differences between the 3288 and 3368
> definitions that were swapped in commit 7707f7227f09. I reviewed them to
> the best of my ability according to the RK3399 TRM and fixed them up.
> 
> This fixes IOMMU issues (and display errors) when testing with BG24
> color formats.
> 
> Fixes: 7707f7227f09 ("drm/rockchip: Add support for afbc")
> Cc: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Brian Norris <briannorris@...omium.org>

Tested-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>

> ---
> I'd appreciate notes or testing from Andrzej, since I'm not sure how he
> tested his original AFBC work.
> 
>   drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 8 +++++---
>   1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
> index 1f7353f0684a..798b542e5916 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_vop_reg.c
> @@ -902,6 +902,7 @@ static const struct vop_win_phy rk3399_win01_data = {
>   	.enable = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 0),
>   	.format = VOP_REG(RK3288_WIN0_CTRL0, 0x7, 1),
>   	.rb_swap = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 12),
> +	.x_mir_en = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 21),
>   	.y_mir_en = VOP_REG(RK3288_WIN0_CTRL0, 0x1, 22),
>   	.act_info = VOP_REG(RK3288_WIN0_ACT_INFO, 0x1fff1fff, 0),
>   	.dsp_info = VOP_REG(RK3288_WIN0_DSP_INFO, 0x0fff0fff, 0),
> @@ -912,6 +913,7 @@ static const struct vop_win_phy rk3399_win01_data = {
>   	.uv_vir = VOP_REG(RK3288_WIN0_VIR, 0x3fff, 16),
>   	.src_alpha_ctl = VOP_REG(RK3288_WIN0_SRC_ALPHA_CTRL, 0xff, 0),
>   	.dst_alpha_ctl = VOP_REG(RK3288_WIN0_DST_ALPHA_CTRL, 0xff, 0),
> +	.channel = VOP_REG(RK3288_WIN0_CTRL2, 0xff, 0),
>   };
>   
>   /*
> @@ -922,11 +924,11 @@ static const struct vop_win_phy rk3399_win01_data = {
>   static const struct vop_win_data rk3399_vop_win_data[] = {
>   	{ .base = 0x00, .phy = &rk3399_win01_data,
>   	  .type = DRM_PLANE_TYPE_PRIMARY },
> -	{ .base = 0x40, .phy = &rk3288_win01_data,
> +	{ .base = 0x40, .phy = &rk3368_win01_data,
>   	  .type = DRM_PLANE_TYPE_OVERLAY },
> -	{ .base = 0x00, .phy = &rk3288_win23_data,
> +	{ .base = 0x00, .phy = &rk3368_win23_data,
>   	  .type = DRM_PLANE_TYPE_OVERLAY },
> -	{ .base = 0x50, .phy = &rk3288_win23_data,
> +	{ .base = 0x50, .phy = &rk3368_win23_data,
>   	  .type = DRM_PLANE_TYPE_CURSOR },
>   };
>