linux-kernel - Re: [linux-sunxi] [PATCH 5/9] media: platform: Add Sunxi Cedrus decoder driver

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Date:   Mon, 12 Mar 2018 17:15:00 +0000
From:   Joonas Kylmälä <joonas.kylmala@....fi>
To:     paul.kocialkowski@...tlin.com
Cc:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Icenowy Zheng <icenowy@...c.xyz>,
        Florent Revest <revestflo@...il.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Thomas van Kleef <thomas@...sch.nl>,
        "Signed-off-by : Bob Ham" <rah@...trans.net>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>
Subject: Re: [linux-sunxi] [PATCH 5/9] media: platform: Add Sunxi Cedrus
 decoder driver

Paul Kocialkowski:
> diff --git a/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
> new file mode 100644
> index 000000000000..7384daa94737
> --- /dev/null
> +++ b/drivers/media/platform/sunxi-cedrus/sunxi_cedrus_regs.h
> @@ -0,0 +1,170 @@
> +/*
> + * Sunxi Cedrus codec driver
> + *
> + * Copyright (C) 2016 Florent Revest
> + * Florent Revest <florent.revest@...e-electrons.com>
> + *
> + * Based on Cedrus
> + *
> + * Copyright (c) 2013 Jens Kuske <jenskuske@...il.com>
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#ifndef SUNXI_CEDRUS_REGS_H
> +#define SUNXI_CEDRUS_REGS_H
> +
> +/*
> + * For more information consult http://linux-sunxi.org/VE_Register_guide
> + */
> +
> +/* Special registers values */
> +
> +/* VE_CTRL:
> + * The first 3 bits indicate the engine (0 for MPEG, 1 for H264, b for AVC...)
> + * The 16th and 17th bits indicate the memory type (3 for DDR3 32 bits)
> + * The 20th bit is unknown but needed
> + */
> +#define VE_CTRL_MPEG		0x130000
> +#define VE_CTRL_H264		0x130001
> +#define VE_CTRL_AVC		0x13000b
> +#define VE_CTRL_REINIT		0x130007
> +
> +/* VE_MPEG_CTRL:
> + * The bit 3 (0x8) is used to enable IRQs
> + * The other bits are unknown but needed
> + */
> +#define VE_MPEG_CTRL_MPEG2	0x800001b8
> +#define VE_MPEG_CTRL_MPEG4	(0x80084118 | BIT(7))
> +#define VE_MPEG_CTRL_MPEG4_P	(VE_MPEG_CTRL_MPEG4 | BIT(12))
> +
> +/* VE_MPEG_VLD_ADDR:
> + * The bits 27 to 4 are used for the address
> + * The bits 31 to 28 (0x7) are used to select the MPEG or JPEG engine
> + */
> +#define VE_MPEG_VLD_ADDR_VAL(x)	((x & 0x0ffffff0) | (x >> 28) | (0x7 << 28))
> +
> +/* VE_MPEG_TRIGGER:
> + * The first three bits are used to trigger the engine
> + * The bits 24 to 26 are used to select the input format (1 for MPEG1, 2 for 

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