linux-kernel - Re: [PATCH 01/16] gpu: ipu-v3: Add Video Deinterlacer unit

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Date:	Sun, 10 Jul 2016 20:02:57 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	Steve Longerbeam <slongerbeam@...il.com>
Cc:	p.zabel@...gutronix.de, dri-devel@...ts.freedesktop.org,
	LKML <linux-kernel@...r.kernel.org>,
	Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH 01/16] gpu: ipu-v3: Add Video Deinterlacer unit

On Thu, Jul 7, 2016 at 7:03 PM, Steve Longerbeam <slongerbeam@...il.com> wrote:
> Adds the Video Deinterlacer (VDIC) unit.
>
> Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
> ---
>  drivers/gpu/ipu-v3/Makefile     |   2 +-
>  drivers/gpu/ipu-v3/ipu-common.c |  11 ++
>  drivers/gpu/ipu-v3/ipu-prv.h    |   6 +
>  drivers/gpu/ipu-v3/ipu-vdi.c    | 266 ++++++++++++++++++++++++++++++++++++++++
>  include/video/imx-ipu-v3.h      |  27 ++++
>  5 files changed, 311 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/ipu-v3/ipu-vdi.c
>
> diff --git a/drivers/gpu/ipu-v3/Makefile b/drivers/gpu/ipu-v3/Makefile
> index 107ec23..aeba9dc 100644
> --- a/drivers/gpu/ipu-v3/Makefile
> +++ b/drivers/gpu/ipu-v3/Makefile
> @@ -1,4 +1,4 @@
>  obj-$(CONFIG_IMX_IPUV3_CORE) += imx-ipu-v3.o
>
>  imx-ipu-v3-objs := ipu-common.o ipu-cpmem.o ipu-csi.o ipu-dc.o ipu-di.o \
> -               ipu-dp.o ipu-dmfc.o ipu-ic.o ipu-smfc.o
> +               ipu-dp.o ipu-dmfc.o ipu-ic.o ipu-smfc.o ipu-vdi.o
> diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
> index 99dcacf..30dc115 100644
> --- a/drivers/gpu/ipu-v3/ipu-common.c
> +++ b/drivers/gpu/ipu-v3/ipu-common.c
> @@ -833,6 +833,14 @@ static int ipu_submodules_init(struct ipu_soc *ipu,
>                 goto err_ic;
>         }
>
> +       ret = ipu_vdi_init(ipu, dev, ipu_base + devtype->vdi_ofs,
> +                          IPU_CONF_VDI_EN | IPU_CONF_ISP_EN |
> +                          IPU_CONF_IC_INPUT);
> +       if (ret) {
> +               unit = "vdi";
> +               goto err_vdi;
> +       }
> +
>         ret = ipu_di_init(ipu, dev, 0, ipu_base + devtype->disp0_ofs,
>                           IPU_CONF_DI0_EN, ipu_clk);
>         if (ret) {
> @@ -887,6 +895,8 @@ err_dc:
>  err_di_1:
>         ipu_di_exit(ipu, 0);
>  err_di_0:
> +       ipu_vdi_exit(ipu);
> +err_vdi:
>         ipu_ic_exit(ipu);
>  err_ic:
>         ipu_csi_exit(ipu, 1);
> @@ -971,6 +981,7 @@ static void ipu_submodules_exit(struct ipu_soc *ipu)
>         ipu_dc_exit(ipu);
>         ipu_di_exit(ipu, 1);
>         ipu_di_exit(ipu, 0);
> +       ipu_vdi_exit(ipu);
>         ipu_ic_exit(ipu);
>         ipu_csi_exit(ipu, 1);
>         ipu_csi_exit(ipu, 0);
> diff --git a/drivers/gpu/ipu-v3/ipu-prv.h b/drivers/gpu/ipu-v3/ipu-prv.h
> index bfb1e8a..845f64c 100644
> --- a/drivers/gpu/ipu-v3/ipu-prv.h
> +++ b/drivers/gpu/ipu-v3/ipu-prv.h
> @@ -138,6 +138,7 @@ struct ipu_dc_priv;
>  struct ipu_dmfc_priv;
>  struct ipu_di;
>  struct ipu_ic_priv;
> +struct ipu_vdi;
>  struct ipu_smfc_priv;
>
>  struct ipu_devtype;
> @@ -169,6 +170,7 @@ struct ipu_soc {
>         struct ipu_di           *di_priv[2];
>         struct ipu_csi          *csi_priv[2];
>         struct ipu_ic_priv      *ic_priv;
> +       struct ipu_vdi          *vdi_priv;
>         struct ipu_smfc_priv    *smfc_priv;
>  };
>
> @@ -199,6 +201,10 @@ int ipu_ic_init(struct ipu_soc *ipu, struct device *dev,
>                 unsigned long base, unsigned long tpmem_base);
>  void ipu_ic_exit(struct ipu_soc *ipu);
>
> +int ipu_vdi_init(struct ipu_soc *ipu, struct device *dev,
> +                unsigned long base, u32 module);
> +void ipu_vdi_exit(struct ipu_soc *ipu);
> +
>  int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
>                 unsigned long base, u32 module, struct clk *ipu_clk);
>  void ipu_di_exit(struct ipu_soc *ipu, int id);
> diff --git a/drivers/gpu/ipu-v3/ipu-vdi.c b/drivers/gpu/ipu-v3/ipu-vdi.c
> new file mode 100644
> index 0000000..1303bcc
> --- /dev/null
> +++ b/drivers/gpu/ipu-v3/ipu-vdi.c
> @@ -0,0 +1,266 @@
> +/*
> + * Copyright (C) 2012 Mentor Graphics Inc.
> + * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the License, or (at your
> + * option) any later version.
> + *
> + * 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.
> + */
> +#include <linux/export.h>
> +#include <linux/module.h>

You have a u32 field in a struct called "modules" but aside from that, I do not
see anything in this code requiring module.h -- did I miss something?

You might want export.h for EXPORT_SYMBOL though.

Paul.
--

> +#include <linux/types.h>
> +#include <linux/errno.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/err.h>
> +#include <linux/platform_device.h>
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/clkdev.h>
> +#include <uapi/linux/v4l2-mediabus.h>
> +
> +#include "ipu-prv.h"
> +

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