DRM: add DRM Driver for Samsung SoC EXYNOS4210. (1c248b7d) · Commits · e / devices / android_kernel_teracube_2e

drivers/gpu/drm/Kconfig

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		@@ -158,3 +158,5 @@ config DRM_SAVAGE
		help
		Choose this option if you have a Savage3D/4/SuperSavage/Pro/Twister
		chipset. If M is selected the module will be called savage.

		source "drivers/gpu/drm/exynos/Kconfig"
		No newline at end of file

drivers/gpu/drm/Makefile

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		@@ -35,4 +35,5 @@ obj-$(CONFIG_DRM_SAVAGE)+= savage/
		obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
		obj-$(CONFIG_DRM_VIA) +=via/
		obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
		obj-$(CONFIG_DRM_EXYNOS) +=exynos/
		obj-y += i2c/

drivers/gpu/drm/exynos/Kconfig

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		config DRM_EXYNOS
		tristate "DRM Support for Samsung SoC EXYNOS Series"
		depends on DRM && PLAT_SAMSUNG
		default n
		select DRM_KMS_HELPER
		select FB_CFB_FILLRECT
		select FB_CFB_COPYAREA
		select FB_CFB_IMAGEBLIT
		select VT_HW_CONSOLE_BINDING if FRAMEBUFFER_CONSOLE
		help
		Choose this option if you have a Samsung SoC EXYNOS chipset.
		If M is selected the module will be called exynosdrm.

		config DRM_EXYNOS_FIMD
		tristate "Exynos DRM FIMD"
		depends on DRM_EXYNOS
		default n
		help
		Choose this option if you want to use Exynos FIMD for DRM.
		If M is selected, the module will be called exynos_drm_fimd

drivers/gpu/drm/exynos/Makefile

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		#
		# Makefile for the drm device driver. This driver provides support for the
		# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.

		ccflags-y := -Iinclude/drm -Idrivers/gpu/drm/exynos
		exynosdrm-y := exynos_drm_drv.o exynos_drm_encoder.o exynos_drm_connector.o \
		exynos_drm_crtc.o exynos_drm_fbdev.o exynos_drm_fb.o \
		exynos_drm_buf.o exynos_drm_gem.o exynos_drm_core.o

		obj-$(CONFIG_DRM_EXYNOS) += exynosdrm.o
		obj-$(CONFIG_DRM_EXYNOS_FIMD) += exynos_drm_fimd.o

drivers/gpu/drm/exynos/exynos_drm_buf.c

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		/* exynos_drm_buf.c
		*
		* Copyright (c) 2011 Samsung Electronics Co., Ltd.
		* Author: Inki Dae <inki.dae@samsung.com>
		*
		* Permission is hereby granted, free of charge, to any person obtaining a
		* copy of this software and associated documentation files (the "Software"),
		* to deal in the Software without restriction, including without limitation
		* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		* and/or sell copies of the Software, and to permit persons to whom the
		* Software is furnished to do so, subject to the following conditions:
		*
		* The above copyright notice and this permission notice (including the next
		* paragraph) shall be included in all copies or substantial portions of the
		* Software.
		*
		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
		* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
		* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
		* OTHER DEALINGS IN THE SOFTWARE.
		*/

		#include "drmP.h"
		#include "drm.h"

		#include "exynos_drm_drv.h"
		#include "exynos_drm_buf.h"

		static DEFINE_MUTEX(exynos_drm_buf_lock);

		static int lowlevel_buffer_allocate(struct drm_device *dev,
		struct exynos_drm_buf_entry *entry)
		{
		DRM_DEBUG_KMS("%s\n", __FILE__);

		entry->vaddr = dma_alloc_writecombine(dev->dev, entry->size,
		(dma_addr_t *)&entry->paddr, GFP_KERNEL);
		if (!entry->paddr) {
		DRM_ERROR("failed to allocate buffer.\n");
		return -ENOMEM;
		}

		DRM_DEBUG_KMS("allocated : vaddr(0x%x), paddr(0x%x), size(0x%x)\n",
		(unsigned int)entry->vaddr, entry->paddr, entry->size);

		return 0;
		}

		static void lowlevel_buffer_deallocate(struct drm_device *dev,
		struct exynos_drm_buf_entry *entry)
		{
		DRM_DEBUG_KMS("%s.\n", __FILE__);

		if (entry->paddr && entry->vaddr && entry->size)
		dma_free_writecombine(dev->dev, entry->size, entry->vaddr,
		entry->paddr);
		else
		DRM_DEBUG_KMS("entry data is null.\n");
		}

		struct exynos_drm_buf_entry exynos_drm_buf_create(struct drm_device dev,
		unsigned int size)
		{
		struct exynos_drm_buf_entry *entry;

		DRM_DEBUG_KMS("%s.\n", __FILE__);

		entry = kzalloc(sizeof(*entry), GFP_KERNEL);
		if (!entry) {
		DRM_ERROR("failed to allocate exynos_drm_buf_entry.\n");
		return ERR_PTR(-ENOMEM);
		}

		entry->size = size;

		/*
		* allocate memory region with size and set the memory information
		* to vaddr and paddr of a entry object.
		*/
		if (lowlevel_buffer_allocate(dev, entry) < 0) {
		kfree(entry);
		entry = NULL;
		return ERR_PTR(-ENOMEM);
		}

		return entry;
		}

		void exynos_drm_buf_destroy(struct drm_device *dev,
		struct exynos_drm_buf_entry *entry)
		{
		DRM_DEBUG_KMS("%s.\n", __FILE__);

		if (!entry) {
		DRM_DEBUG_KMS("entry is null.\n");
		return;
		}

		lowlevel_buffer_deallocate(dev, entry);

		kfree(entry);
		entry = NULL;
		}

		MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
		MODULE_DESCRIPTION("Samsung SoC DRM Buffer Management Module");
		MODULE_LICENSE("GPL");