linux-kernel - Re: [PATCH v4 3/5] drm/etnaviv: Add a new function to emit a series of states to cmd stream

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Message-ID: <CAH9NwWev7PjkkSW8N=0aM+3LVOLXajnhs12SPCe6w2ULRA830w@mail.gmail.com>
Date: Mon, 17 Nov 2025 09:27:08 +0100
From: Christian Gmeiner <christian.gmeiner@...il.com>
To: gert.wollny@...labora.com
Cc: Lucas Stach <l.stach@...gutronix.de>, Russell King <linux+etnaviv@...linux.org.uk>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, etnaviv@...ts.freedesktop.org, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/5] drm/etnaviv: Add a new function to emit a series
 of states to cmd stream

> From: Gert Wollny <gert.wollny@...labora.com>
>
> v2: fix formatting and remove superfluous masking (Lucas)
>
> Signed-off-by: Gert Wollny <gert.wollny@...labora.com>

Reviewed-by: Christian Gmeiner <cgmeiner@...lia.com>

> ---
>  drivers/gpu/drm/etnaviv/etnaviv_buffer.h | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_buffer.h b/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
> index ae1ba1db6c8a..9388a686edcf 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_buffer.h
> @@ -43,6 +43,19 @@ static inline void CMD_LOAD_STATE(struct etnaviv_cmdbuf *buffer, u32 reg,
>         OUT(buffer, value);
>  }
>
> +static inline void CMD_LOAD_STATES_START(struct etnaviv_cmdbuf *buffer, u32 reg,
> +                                        u32 nvalues)
> +{
> +       u32 index = reg >> VIV_FE_LOAD_STATE_HEADER_OFFSET__SHR;
> +
> +       buffer->user_size = ALIGN(buffer->user_size, 8);
> +
> +       /* write a register via cmd stream */
> +       OUT(buffer, VIV_FE_LOAD_STATE_HEADER_OP_LOAD_STATE |
> +                           VIV_FE_LOAD_STATE_HEADER_OFFSET(index) |
> +                           VIV_FE_LOAD_STATE_HEADER_COUNT(nvalues));
> +}
> +
>  static inline void CMD_END(struct etnaviv_cmdbuf *buffer)
>  {
>         buffer->user_size = ALIGN(buffer->user_size, 8);
> --
> 2.51.0
>


-- 
greets
--
Christian Gmeiner, MSc

https://christian-gmeiner.info/privacypolicy