linux-kernel - Re:Re: [PATCH v5 05/18] drm/rockchip: vop2: Set AXI id for rk3588

Open Source and information security mailing list archives

Message-ID: <56a01c0e.20d5.193c42f8f9b.Coremail.andyshrk@163.com>
Date: Sat, 14 Dec 2024 16:01:11 +0800 (CST)
From: "Andy Yan" <andyshrk@....com>
To: "Detlev Casanova" <detlev.casanova@...labora.com>
Cc: heiko@...ech.de, hjc@...k-chips.com, krzk+dt@...nel.org, 
	s.hauer@...gutronix.de, devicetree@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-rockchip@...ts.infradead.org, derek.foreman@...labora.com, 
	"Andy Yan" <andy.yan@...k-chips.com>, kernel@...labora.com
Subject: Re:Re: [PATCH v5 05/18] drm/rockchip: vop2: Set AXI id for rk3588

Hi Detlev,

At 2024-12-14 02:34:03, "Detlev Casanova" <detlev.casanova@...labora.com> wrote:
>On Thursday, 12 December 2024 02:52:34 EST Andy Yan wrote:
>> Hi Detlev,
>> 
>> At 2024-12-11 23:45:01, "Detlev Casanova" <detlev.casanova@...labora.com> 
>wrote:
>> >On Wednesday, 11 December 2024 01:34:34 EST Andy Yan wrote:
>> >> Hi Detlev,
>> >> 
>> >> At 2024-12-11 02:40:14, "Detlev Casanova" <detlev.casanova@...labora.com>
>> >
>> >wrote:
>> >> >Hi Andy,
>> >> >
>> >> >On Monday, 9 December 2024 07:29:18 EST Andy Yan wrote:
>> >> >> From: Andy Yan <andy.yan@...k-chips.com>
>> >> >> 
>> >> >> There are two AXI bus in vop2, windows attached on the same bus must
>> >> >> have a unique channel YUV and RGB channel ID.
>> >> >> 
>> >> >> The default IDs will conflict with each other on the rk3588, so they
>> >> >> need to be reassigned.
>> >> >> 
>> >> >> Fixes: 5a028e8f062f ("drm/rockchip: vop2: Add support for rk3588")
>> >> >> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>> >> >> Tested-by: Derek Foreman <derek.foreman@...labora.com>
>> >> >> 
>> >> >> ---
>> >> >> 
>> >> >> Changes in v5:
>> >> >> - Added in V5
>> >> >> 
>> >> >>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 14 +++++++++++
>> >> >>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.h |  9 +++++++
>> >> >>  drivers/gpu/drm/rockchip/rockchip_vop2_reg.c | 26
>> >> >>  +++++++++++++++++++-
>> >> >>  3 files changed, 48 insertions(+), 1 deletion(-)
>> >> >> 
>> >> >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> >> >> b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c index
>> >> >> dc4edd65bc9e..8b9ca046eeeb 100644
>> >> >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> >> >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
>> >> >> @@ -1426,6 +1426,12 @@ static void vop2_plane_atomic_update(struct
>> >> >> drm_plane *plane, &fb->format->format,
>> >> >> 
>> >> >>  		afbc_en ? "AFBC" : "", &yrgb_mst);
>> >> >> 
>> >> >> +	if (vop2->data->soc_id > 3568) {
>> >> >
>> >> >Shouldn't this be done only for rk3588, as specified in the comments
>> >> >below
>> >> >? The test we did before showed that it is failing on rk3576 and 3576 is
>> >> >>
>> >> >3588.
>> >> 
>> >> I think this is because you tested before with the patch I gave Derek
>> >> without axi id assigned for rk3576.
>> >> I assigned axi id for rk3576 in this version 18/18（The new ID assignment
>> >> can adapt to more application scenarios.）, can you test it with the
>> >> whole V5 version again?
>> >
>> >Yes, I will do that. But patch 18 mentions:
>> >+       /* Read only bit on rk3576*/
>> >+       [VOP2_WIN_AXI_BUS_ID] = REG_FIELD(RK3568_CLUSTER_CTRL, 13, 13),
>> >
>> >And the bit is being written here. If it is indeed writable, then I would
>> >drop that comment.
>> 
>> The AXI_BUS_ID for two Cluster windows on RK3576 are fixed by hardware, that
>> means whether we write it or not, it won't change anything.
>> But the AXI_BUS_ID for Esmart windows on rk3576 and  AXI_YRGB/UV_R_ID for
>> all cluster/esmart windows on rk3576 are writeable.
>> I think we directly write it here as the current code can make things easy.
>
>I see, saying it is read only may be a bit confusing then, but it makes sense. 
>You could be more specific adding that writing has no effect.

Okay,  I will add more specific explanation in v6

>
>Anyway, I tested this and it works as expected:
>
>Tested-by: Detlev Casanova <detlev.casanova@...labora.com>
>
>Regards,
>Detlev.
>
>> >> >I suggest
>> >> >
>> >> >	if (vop2->data->soc_id == 3588) {
>> >> >
>> >> >Regards,
>> >> >Detlev
>> >> >
>> >> >> +		vop2_win_write(win, VOP2_WIN_AXI_BUS_ID, win->data-
>> >> >>
>> >> >>axi_bus_id);
>> >> >>
>> >> >> +		vop2_win_write(win, VOP2_WIN_AXI_YRGB_R_ID, win->data-
>> >> >>
>> >> >>axi_yrgb_r_id);
>> >> >>
>> >> >> +		vop2_win_write(win, VOP2_WIN_AXI_UV_R_ID, win->data-
>> >> >>
>> >> >>axi_uv_r_id);
>> >> >>
>> >> >> +	}
>> >> >> +
>> >> >> 
>> >> >>  	if (vop2_cluster_window(win))
>> >> >>  	
>> >> >>  		vop2_win_write(win, VOP2_WIN_AFBC_HALF_BLOCK_EN,
>> >> >
>> >> >half_block_en);
>> >
>> >Detlev.
>> >
>> >
>> >
>> >_______________________________________________
>> >Linux-rockchip mailing list
>> >Linux-rockchip@...ts.infradead.org
>> >http://lists.infradead.org/mailman/listinfo/linux-rockchip
>
>
>
>

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives