From: Rob Clark <[email protected]> Register OMAP DRM/KMS platform device, and reserve a CMA region for the device to use for buffer allocation.
Signed-off-by: Rob Clark <[email protected]> --- 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 + * + * DRM/KMS device registration for TI OMAP platforms + * + * Copyright (C) 2011 Texas Instruments + * Author: Rob Clark <[email protected]> + * + * 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 + * + * DRM/KMS device registration for TI OMAP platforms + * + * Copyright (C) 2011 Texas Instruments + * Author: Rob Clark <[email protected]> + * + * 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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
