From: Andy Gross <andy.gross@xxxxxx> Register OMAP DRM/KMS platform device, and reserve a CMA region for the device to use for buffer allocation. DMM is split into a separate device using hwmod. Signed-off-by: Andy Gross <andy.gross@xxxxxx> Signed-off-by: Rob Clark <rob@xxxxxx> --- arch/arm/mach-omap2/Makefile | 4 ++ arch/arm/mach-omap2/drm.c | 83 +++++++++++++++++++++++++++++++++ arch/arm/plat-omap/common.c | 3 +- arch/arm/plat-omap/include/plat/drm.h | 64 +++++++++++++++++++++++++ 4 files changed, 153 insertions(+), 1 deletions(-) create mode 100644 arch/arm/mach-omap2/drm.c create mode 100644 arch/arm/plat-omap/include/plat/drm.h diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index bd76394..9e6065b 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -189,6 +189,10 @@ ifneq ($(CONFIG_TIDSPBRIDGE),) obj-y += dsp.o endif +ifneq ($(CONFIG_DRM_OMAP),) +obj-y += drm.o +endif + # Specific board support obj-$(CONFIG_MACH_OMAP_GENERIC) += board-generic.o obj-$(CONFIG_MACH_OMAP_H4) += board-h4.o diff --git a/arch/arm/mach-omap2/drm.c b/arch/arm/mach-omap2/drm.c new file mode 100644 index 0000000..779ae02 --- /dev/null +++ b/arch/arm/mach-omap2/drm.c @@ -0,0 +1,83 @@ +/* + * DRM/KMS device registration for TI OMAP platforms + * + * Copyright (C) 2012 Texas Instruments + * Author: Rob Clark <rob.clark@xxxxxxxxxx> + * + * 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 <plat/drm.h> + +#if defined(CONFIG_DRM_OMAP) || (CONFIG_DRM_OMAP_MODULE) + +static struct omap_drm_platform_data omapdrm_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_drm(void) +{ + struct omap_hwmod *oh = NULL; + struct platform_device *pdev; + + /* lookup and populate the DMM information, if present - OMAP4+ */ + oh = omap_hwmod_lookup("dmm"); + + if (oh) { + pdev = omap_device_build(oh->name, -1, oh, NULL, 0, NULL, 0, + false); + WARN(IS_ERR(pdev), "Could not build omap_device for %s\n", + oh->name); + } + + return platform_device_register(&omap_drm_device); + +} + +arch_initcall(omap_init_drm); + +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/common.c b/arch/arm/plat-omap/common.c index 4de7d1e..e027cc7 100644 --- a/arch/arm/plat-omap/common.c +++ b/arch/arm/plat-omap/common.c @@ -21,10 +21,10 @@ #include <plat/board.h> #include <plat/vram.h> #include <plat/dsp.h> +#include <plat/drm.h> #include <plat/omap-secure.h> - #define NO_LENGTH_CHECK 0xffffffff struct omap_board_config_kernel *omap_board_config __initdata; @@ -65,6 +65,7 @@ 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/include/plat/drm.h b/arch/arm/plat-omap/include/plat/drm.h new file mode 100644 index 0000000..df9bc41 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/drm.h @@ -0,0 +1,64 @@ +/* + * DRM/KMS device registration for TI OMAP platforms + * + * Copyright (C) 2012 Texas Instruments + * Author: Rob Clark <rob.clark@xxxxxxxxxx> + * + * 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__ + +/* + * Optional platform data to configure the default configuration of which + * pipes/overlays/CRTCs are used.. if this is not provided, then instead the + * first CONFIG_DRM_OMAP_NUM_CRTCS are used, and they are each connected to + * one manager, with priority given to managers that are connected to + * detected devices. Remaining overlays are used as video planes. This + * should be a good default behavior for most cases, but yet there still + * might be times when you wish to do something different. + */ +struct omap_kms_platform_data { + /* overlays to use as CRTCs: */ + int ovl_cnt; + const int *ovl_ids; + + /* overlays to use as video planes: */ + int pln_cnt; + const int *pln_ids; + + int mgr_cnt; + const int *mgr_ids; + + int dev_cnt; + const char **dev_names; +}; + +struct omap_drm_platform_data { + struct omap_kms_platform_data *kms_pdata; +}; + +#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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
