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

[Detlev Casanova <detlev.casanova@collabora.com>]

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@collabora.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@collabora.com>
> >
> >wrote:
> >> >Hi Andy,
> >> >
> >> >On Monday, 9 December 2024 07:29:18 EST Andy Yan wrote:
> >> >> From: Andy Yan <andy.yan@rock-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@rock-chips.com>
> >> >> Tested-by: Derek Foreman <derek.foreman@collabora.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.

Anyway, I tested this and it works as expected:

Tested-by: Detlev Casanova <detlev.casanova@collabora.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@lists.infradead.org
> >http://lists.infradead.org/mailman/listinfo/linux-rockchip