Re: [PATCH] omap2+: add drm device

["Aguirre, Sergio" <saaguirre@ti.com>]

Hi Rob,

Minor nitpicks.

On Fri, Jan 13, 2012 at 1:41 PM, Rob Clark <rob.clark@linaro.org> wrote:
> From: Rob Clark <rob@ti.com>
>
> Register OMAP DRM/KMS platform device, and reserve a CMA region for
> the device to use for buffer allocation.
>
> Signed-off-by: Rob Clark <rob@ti.com>
> ---
>  arch/arm/plat-omap/Makefile |    2 +-
>  arch/arm/plat-omap/common.c |    2 +
>  arch/arm/plat-omap/drm.c    |   88 +++++++++++++++++++++++++++++++++++++++++++
>  arch/arm/plat-omap/drm.h    |   37 ++++++++++++++++++
>  4 files changed, 128 insertions(+), 1 deletions(-)
>  create mode 100644 arch/arm/plat-omap/drm.c
>  create mode 100644 arch/arm/plat-omap/drm.h
>
> diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile
> index 9a58461..b86e6cb 100644
> --- a/arch/arm/plat-omap/Makefile
> +++ b/arch/arm/plat-omap/Makefile
> @@ -4,7 +4,7 @@
>
>  # Common support
>  obj-y := common.o sram.o clock.o devices.o dma.o mux.o \
> -        usb.o fb.o counter_32k.o
> +        usb.o fb.o counter_32k.o drm.o
>  obj-m :=
>  obj-n :=
>  obj-  :=
> diff --git a/arch/arm/plat-omap/common.c b/arch/arm/plat-omap/common.c
> index 06383b5..caf6082 100644
> --- a/arch/arm/plat-omap/common.c
> +++ b/arch/arm/plat-omap/common.c
> @@ -24,6 +24,7 @@
>
>  #include <plat/omap-secure.h>
>
> +#include "drm.h"
>
>  #define NO_LENGTH_CHECK 0xffffffff
>
> @@ -65,6 +66,7 @@ const void *__init omap_get_var_config(u16 tag, size_t *len)
>
>  void __init omap_reserve(void)
>  {
> +       omapdrm_reserve_vram();
>        omapfb_reserve_sdram_memblock();
>        omap_vram_reserve_sdram_memblock();
>        omap_dsp_reserve_sdram_memblock();
> diff --git a/arch/arm/plat-omap/drm.c b/arch/arm/plat-omap/drm.c
> new file mode 100644
> index 0000000..5d8588f
> --- /dev/null
> +++ b/arch/arm/plat-omap/drm.c
> @@ -0,0 +1,88 @@
> +/*
> + * File: arch/arm/plat-omap/drm.c

I believe keeping a file path is frowned upon.

> + *
> + * DRM/KMS device registration for TI OMAP platforms
> + *
> + * Copyright (C) 2011 Texas Instruments

Happy new year! (2012?) :)

> + * Author: Rob Clark <rob.clark@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + *
> + * 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.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/mm.h>
> +#include <linux/init.h>
> +#include <linux/platform_device.h>
> +#include <linux/dma-mapping.h>
> +#ifdef CONFIG_CMA
> +#  include <linux/dma-contiguous.h>
> +#endif
> +
> +#include <plat/omap_device.h>
> +#include <plat/omap_hwmod.h>
> +
> +#include "drm.h"
> +
> +/* files from staging that contain platform data structure definitions */
> +#include "../../../drivers/staging/omapdrm/omap_priv.h"
> +#include "../../../drivers/staging/omapdrm/omap_dmm_tiler.h"
> +
> +#if defined(CONFIG_DRM_OMAP) || (CONFIG_DRM_OMAP_MODULE)
> +
> +static struct omap_drm_platform_data omapdrm_platdata;
> +static struct omap_dmm_platform_data dmm_platdata;
> +
> +static struct platform_device omap_drm_device = {
> +               .dev = {
> +                       .coherent_dma_mask = DMA_BIT_MASK(32),
> +                       .platform_data = &omapdrm_platdata,
> +               },
> +               .name = "omapdrm",
> +               .id = 0,
> +};
> +
> +static int __init omap_init_gpu(void)
> +{
> +       struct omap_hwmod *oh = NULL;
> +
> +       /* lookup and populate the DMM information, if present - OMAP4+ */
> +       oh = omap_hwmod_lookup("dmm");
> +
> +       if (oh) {
> +               dmm_platdata.base = omap_hwmod_get_mpu_rt_va(oh);
> +               dmm_platdata.irq = oh->mpu_irqs[0].irq;
> +
> +               if (dmm_platdata.base)
> +                       omapdrm_platdata.dmm_pdata = &dmm_platdata;
> +       }
> +
> +       return platform_device_register(&omap_drm_device);
> +}
> +
> +arch_initcall(omap_init_gpu);
> +
> +void omapdrm_reserve_vram(void)
> +{
> +#ifdef CONFIG_CMA
> +       /* Create private 32MiB contiguous memory area for omapdrm.0 device
> +        * TODO revisit size.. if uc/wc buffers are allocated from CMA pages
> +        * then the amount of memory we need goes up..
> +        */
> +       dma_declare_contiguous(&omap_drm_device.dev, 32*SZ_1M, 0, 0);
> +#else
> +#  warning "CMA is not enabled, there may be limitations about scanout buffer allocations on OMAP3 and earlier"
> +#endif
> +}
> +
> +#endif
> diff --git a/arch/arm/plat-omap/drm.h b/arch/arm/plat-omap/drm.h
> new file mode 100644
> index 0000000..56e0c0e
> --- /dev/null
> +++ b/arch/arm/plat-omap/drm.h
> @@ -0,0 +1,37 @@
> +/*
> + * File: arch/arm/plat-omap/drm.c

Again here. (The path is incorrect anyways)

> + *
> + * DRM/KMS device registration for TI OMAP platforms
> + *
> + * Copyright (C) 2011 Texas Instruments

2012 also here.

> + * Author: Rob Clark <rob.clark@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + *
> + * 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.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program.  If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef __PLAT_OMAP_DRM_H__
> +#define __PLAT_OMAP_DRM_H__
> +
> +#if defined(CONFIG_DRM_OMAP) || defined(CONFIG_DRM_OMAP_MODULE)
> +
> +void omapdrm_reserve_vram(void);
> +
> +#else
> +
> +static inline void omapdrm_reserve_vram(void)
> +{
> +}
> +
> +#endif
> +
> +#endif /* __PLAT_OMAP_DRM_H__ */
> --
> 1.7.5.4
>
> --
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