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authorInki Dae <inki.dae@samsung.com>2011-10-04 19:19:01 +0900
committerDave Airlie <airlied@redhat.com>2011-10-05 10:27:31 +0100
commit1c248b7d2960faec3e1b8f3f9c5d9d0df28e0a3c (patch)
treedff45afe42d7f7bb5c2bece7a3a5830b49aaa60b /drivers/gpu/drm/exynos/exynos_drm_fbdev.c
parent5383053627afab973ffe582a4db9646317bec726 (diff)
downloadvexpress-lsk-1c248b7d2960faec3e1b8f3f9c5d9d0df28e0a3c.tar.gz
DRM: add DRM Driver for Samsung SoC EXYNOS4210.
This patch is a DRM Driver for Samsung SoC Exynos4210 and now enables only FIMD yet but we will add HDMI support also in the future. this patch is based on git repository below: git://people.freedesktop.org/~airlied/linux.git branch name: drm-next commit-id: 88ef4e3f4f616462b78a7838eb3ffc3818d30f67 you can refer to our working repository below: http://git.infradead.org/users/kmpark/linux-2.6-samsung branch name: samsung-drm We tried to re-use lowlevel codes of the FIMD driver(s3c-fb.c based on Linux framebuffer) but couldn't so because lowlevel codes of s3c-fb.c are included internally and so FIMD module of this driver has its own lowlevel codes. We used GEM framework for buffer management and DMA APIs(dma_alloc_*) for buffer allocation so we can allocate physically continuous memory for DMA through it and also we could use CMA later if CMA is applied to mainline. Refer to this link for CMA(Continuous Memory Allocator): http://lkml.org/lkml/2011/7/20/45 this driver supports only physically continuous memory(non-iommu). Links to previous versions of the patchset: v1: < https://lwn.net/Articles/454380/ > v2: < http://www.spinics.net/lists/kernel/msg1224275.html > v3: < http://www.spinics.net/lists/dri-devel/msg13755.html > v4: < http://permalink.gmane.org/gmane.comp.video.dri.devel/60439 > v5: < http://comments.gmane.org/gmane.comp.video.dri.devel/60802 > Changelog v2: DRM: add DRM_IOCTL_SAMSUNG_GEM_MMAP ioctl command. this feature maps user address space to physical memory region once user application requests DRM_IOCTL_SAMSUNG_GEM_MMAP ioctl. DRM: code clean and add exception codes. Changelog v3: DRM: Support multiple irq. FIMD and HDMI have their own irq handler but DRM Framework can regiter only one irq handler this patch supports mutiple irq for Samsung SoC. DRM: Consider modularization. each DRM, FIMD could be built as a module. DRM: Have indenpendent crtc object. crtc isn't specific to SoC Platform so this patch gets a crtc to be used as common object. created crtc could be attached to any encoder object. DRM: code clean and add exception codes. Changelog v4: DRM: remove is_defult from samsung_fb. is_default isn't used for default framebuffer. DRM: code refactoring to fimd module. this patch is be considered with multiple display objects and would use its own request_irq() to register a irq handler instead of drm framework's one. DRM: remove find_samsung_drm_gem_object() DRM: move kernel private data structures and definitions to driver folder. samsung_drm.h would contain only public information for userspace ioctl interface. DRM: code refactoring to gem modules. buffer module isn't dependent of gem module anymore. DRM: fixed security issue. DRM: remove encoder porinter from specific connector. samsung connector doesn't need to have generic encoder. DRM: code clean and add exception codes. Changelog v5: DRM: updated fimd(display controller) driver. added various pixel formats, color key and pixel blending features. DRM: removed end_buf_off from samsung_drm_overlay structure. this variable isn't used and end buffer address would be calculated by each sub driver. DRM: use generic function for mmap_offset. replaced samsung_drm_gem_create_mmap_offset() and samsung_drm_free_mmap_offset() with generic ones applied to mainline recentrly. DRM: removed unnecessary codes and added exception codes. DRM: added comments and code clean. Changelog v6: DRM: added default config options. DRM: added padding for 64-bit align. DRM: changed prefix 'samsung' to 'exynos' Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_fbdev.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_fbdev.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
new file mode 100644
index 00000000000..ac43bfc9e1f
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -0,0 +1,441 @@
+/* exynos_drm_fbdev.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Authors:
+ * Inki Dae <inki.dae@samsung.com>
+ * Joonyoung Shim <jy0922.shim@samsung.com>
+ * Seung-Woo Kim <sw0312.kim@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_crtc.h"
+#include "drm_fb_helper.h"
+#include "drm_crtc_helper.h"
+
+#include "exynos_drm_drv.h"
+#include "exynos_drm_fb.h"
+
+#define MAX_CONNECTOR 4
+#define PREFERRED_BPP 32
+
+#define to_exynos_fbdev(x) container_of(x, struct exynos_drm_fbdev,\
+ drm_fb_helper)
+
+struct exynos_drm_fbdev {
+ struct drm_fb_helper drm_fb_helper;
+ struct drm_framebuffer *fb;
+};
+
+static int exynos_drm_fbdev_set_par(struct fb_info *info)
+{
+ struct fb_var_screeninfo *var = &info->var;
+
+ switch (var->bits_per_pixel) {
+ case 32:
+ case 24:
+ case 18:
+ case 16:
+ case 12:
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 1:
+ info->fix.visual = FB_VISUAL_MONO01;
+ break;
+ default:
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ break;
+ }
+
+ info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8;
+
+ return drm_fb_helper_set_par(info);
+}
+
+
+static struct fb_ops exynos_drm_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = exynos_drm_fbdev_set_par,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_setcmap = drm_fb_helper_setcmap,
+};
+
+static void exynos_drm_fbdev_update(struct drm_fb_helper *helper,
+ struct drm_framebuffer *fb,
+ unsigned int fb_width,
+ unsigned int fb_height)
+{
+ struct fb_info *fbi = helper->fbdev;
+ struct drm_device *dev = helper->dev;
+ struct exynos_drm_fbdev *exynos_fb = to_exynos_fbdev(helper);
+ struct exynos_drm_buffer_info buffer_info;
+ unsigned int size = fb_width * fb_height * (fb->bits_per_pixel >> 3);
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ exynos_fb->fb = fb;
+
+ drm_fb_helper_fill_fix(fbi, fb->pitch, fb->depth);
+ drm_fb_helper_fill_var(fbi, helper, fb_width, fb_height);
+
+ exynos_drm_fb_update_buf_off(fb, fbi->var.xoffset, fbi->var.yoffset,
+ &buffer_info);
+
+ dev->mode_config.fb_base = buffer_info.base_addr;
+
+ fbi->screen_base = buffer_info.vaddr;
+ fbi->screen_size = size;
+ fbi->fix.smem_start = buffer_info.paddr;
+ fbi->fix.smem_len = size;
+}
+
+static int exynos_drm_fbdev_create(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
+ struct drm_device *dev = helper->dev;
+ struct fb_info *fbi;
+ struct drm_mode_fb_cmd mode_cmd = { 0 };
+ struct platform_device *pdev = dev->platformdev;
+ int ret;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d\n",
+ sizes->surface_width, sizes->surface_height,
+ sizes->surface_bpp);
+
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+ mode_cmd.bpp = sizes->surface_bpp;
+ mode_cmd.depth = sizes->surface_depth;
+
+ mutex_lock(&dev->struct_mutex);
+
+ fbi = framebuffer_alloc(0, &pdev->dev);
+ if (!fbi) {
+ DRM_ERROR("failed to allocate fb info.\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
+ if (IS_ERR_OR_NULL(exynos_fbdev->fb)) {
+ DRM_ERROR("failed to create drm framebuffer.\n");
+ ret = PTR_ERR(exynos_fbdev->fb);
+ goto out;
+ }
+
+ helper->fb = exynos_fbdev->fb;
+ helper->fbdev = fbi;
+
+ fbi->par = helper;
+ fbi->flags = FBINFO_FLAG_DEFAULT;
+ fbi->fbops = &exynos_drm_fb_ops;
+
+ ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
+ if (ret) {
+ DRM_ERROR("failed to allocate cmap.\n");
+ goto out;
+ }
+
+ exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width,
+ sizes->fb_height);
+
+/*
+ * if failed, all resources allocated above would be released by
+ * drm_mode_config_cleanup() when drm_load() had been called prior
+ * to any specific driver such as fimd or hdmi driver.
+ */
+out:
+ mutex_unlock(&dev->struct_mutex);
+ return ret;
+}
+
+static bool
+exynos_drm_fbdev_is_samefb(struct drm_framebuffer *fb,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ if (fb->width != sizes->surface_width)
+ return false;
+ if (fb->height != sizes->surface_height)
+ return false;
+ if (fb->bits_per_pixel != sizes->surface_bpp)
+ return false;
+ if (fb->depth != sizes->surface_depth)
+ return false;
+
+ return true;
+}
+
+static int exynos_drm_fbdev_recreate(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct drm_device *dev = helper->dev;
+ struct exynos_drm_fbdev *exynos_fbdev = to_exynos_fbdev(helper);
+ struct drm_framebuffer *fb = exynos_fbdev->fb;
+ struct drm_mode_fb_cmd mode_cmd = { 0 };
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (helper->fb != fb) {
+ DRM_ERROR("drm framebuffer is different\n");
+ return -EINVAL;
+ }
+
+ if (exynos_drm_fbdev_is_samefb(fb, sizes))
+ return 0;
+
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+ mode_cmd.bpp = sizes->surface_bpp;
+ mode_cmd.depth = sizes->surface_depth;
+
+ if (fb->funcs->destroy)
+ fb->funcs->destroy(fb);
+
+ exynos_fbdev->fb = exynos_drm_fb_create(dev, NULL, &mode_cmd);
+ if (IS_ERR(exynos_fbdev->fb)) {
+ DRM_ERROR("failed to allocate fb.\n");
+ return PTR_ERR(exynos_fbdev->fb);
+ }
+
+ helper->fb = exynos_fbdev->fb;
+ exynos_drm_fbdev_update(helper, helper->fb, sizes->fb_width,
+ sizes->fb_height);
+
+ return 0;
+}
+
+static int exynos_drm_fbdev_probe(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ int ret = 0;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!helper->fb) {
+ ret = exynos_drm_fbdev_create(helper, sizes);
+ if (ret < 0) {
+ DRM_ERROR("failed to create fbdev.\n");
+ return ret;
+ }
+
+ /*
+ * fb_helper expects a value more than 1 if succeed
+ * because register_framebuffer() should be called.
+ */
+ ret = 1;
+ } else {
+ ret = exynos_drm_fbdev_recreate(helper, sizes);
+ if (ret < 0) {
+ DRM_ERROR("failed to reconfigure fbdev\n");
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
+ .fb_probe = exynos_drm_fbdev_probe,
+};
+
+int exynos_drm_fbdev_init(struct drm_device *dev)
+{
+ struct exynos_drm_fbdev *fbdev;
+ struct exynos_drm_private *private = dev->dev_private;
+ struct drm_fb_helper *helper;
+ unsigned int num_crtc;
+ int ret;
+
+ DRM_DEBUG_KMS("%s\n", __FILE__);
+
+ if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
+ return 0;
+
+ fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
+ if (!fbdev) {
+ DRM_ERROR("failed to allocate drm fbdev.\n");
+ return -ENOMEM;
+ }
+
+ private->fb_helper = helper = &fbdev->drm_fb_helper;
+ helper->funcs = &exynos_drm_fb_helper_funcs;
+
+ num_crtc = dev->mode_config.num_crtc;
+
+ ret = drm_fb_helper_init(dev, helper, num_crtc, MAX_CONNECTOR);
+ if (ret < 0) {
+ DRM_ERROR("failed to initialize drm fb helper.\n");
+ goto err_init;
+ }
+
+ ret = drm_fb_helper_single_add_all_connectors(helper);
+ if (ret < 0) {
+ DRM_ERROR("failed to register drm_fb_helper_connector.\n");
+ goto err_setup;
+
+ }
+
+ ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
+ if (ret < 0) {
+ DRM_ERROR("failed to set up hw configuration.\n");
+ goto err_setup;
+ }
+
+ return 0;
+
+err_setup:
+ drm_fb_helper_fini(helper);
+
+err_init:
+ private->fb_helper = NULL;
+ kfree(fbdev);
+
+ return ret;
+}
+
+static void exynos_drm_fbdev_destroy(struct drm_device *dev,
+ struct drm_fb_helper *fb_helper)
+{
+ struct drm_framebuffer *fb;
+
+ /* release drm framebuffer and real buffer */
+ if (fb_helper->fb && fb_helper->fb->funcs) {
+ fb = fb_helper->fb;
+ if (fb && fb->funcs->destroy)
+ fb->funcs->destroy(fb);
+ }
+
+ /* release linux framebuffer */
+ if (fb_helper->fbdev) {
+ struct fb_info *info;
+ int ret;
+
+ info = fb_helper->fbdev;
+ ret = unregister_framebuffer(info);
+ if (ret < 0)
+ DRM_DEBUG_KMS("failed unregister_framebuffer()\n");
+
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+
+ framebuffer_release(info);
+ }
+
+ drm_fb_helper_fini(fb_helper);
+}
+
+void exynos_drm_fbdev_fini(struct drm_device *dev)
+{
+ struct exynos_drm_private *private = dev->dev_private;
+ struct exynos_drm_fbdev *fbdev;
+
+ if (!private || !private->fb_helper)
+ return;
+
+ fbdev = to_exynos_fbdev(private->fb_helper);
+
+ exynos_drm_fbdev_destroy(dev, private->fb_helper);
+ kfree(fbdev);
+ private->fb_helper = NULL;
+}
+
+void exynos_drm_fbdev_restore_mode(struct drm_device *dev)
+{
+ struct exynos_drm_private *private = dev->dev_private;
+
+ if (!private || !private->fb_helper)
+ return;
+
+ drm_fb_helper_restore_fbdev_mode(private->fb_helper);
+}
+
+int exynos_drm_fbdev_reinit(struct drm_device *dev)
+{
+ struct exynos_drm_private *private = dev->dev_private;
+ struct drm_fb_helper *fb_helper;
+ int ret;
+
+ if (!private)
+ return -EINVAL;
+
+ if (!dev->mode_config.num_connector) {
+ exynos_drm_fbdev_fini(dev);
+ return 0;
+ }
+
+ fb_helper = private->fb_helper;
+
+ if (fb_helper) {
+ drm_fb_helper_fini(fb_helper);
+
+ ret = drm_fb_helper_init(dev, fb_helper,
+ dev->mode_config.num_crtc, MAX_CONNECTOR);
+ if (ret < 0) {
+ DRM_ERROR("failed to initialize drm fb helper\n");
+ return ret;
+ }
+
+ ret = drm_fb_helper_single_add_all_connectors(fb_helper);
+ if (ret < 0) {
+ DRM_ERROR("failed to add fb helper to connectors\n");
+ goto err;
+ }
+
+ ret = drm_fb_helper_initial_config(fb_helper, PREFERRED_BPP);
+ if (ret < 0) {
+ DRM_ERROR("failed to set up hw configuration.\n");
+ goto err;
+ }
+ } else {
+ /*
+ * if drm_load() failed whem drm load() was called prior
+ * to specific drivers, fb_helper must be NULL and so
+ * this fuction should be called again to re-initialize and
+ * re-configure the fb helper. it means that this function
+ * has been called by the specific drivers.
+ */
+ return exynos_drm_fbdev_init(dev);
+ }
+
+err:
+ /*
+ * if drm_load() failed when drm load() was called prior
+ * to specific drivers, the fb_helper must be NULL and so check it.
+ */
+ if (fb_helper)
+ drm_fb_helper_fini(fb_helper);
+
+ return ret;
+}
+
+MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
+MODULE_DESCRIPTION("Samsung SoC DRM FBDEV Driver");
+MODULE_LICENSE("GPL");