--- /dev/null
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors: Dave Airlie <airlied@redhat.com>
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/sysrq.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include "ast_drv.h"
+
+static void ast_dirty_update(struct ast_fbdev *afbdev,
+ int x, int y, int width, int height)
+{
+ int i;
+ struct drm_gem_object *obj;
+ struct ast_bo *bo;
+ int src_offset, dst_offset;
+ int bpp = (afbdev->afb.base.bits_per_pixel + 7)/8;
+ int ret = -EBUSY;
+ bool unmap = false;
+ bool store_for_later = false;
+ int x2, y2;
+ unsigned long flags;
+
+ obj = afbdev->afb.obj;
+ bo = gem_to_ast_bo(obj);
+
+ /*
+ * try and reserve the BO, if we fail with busy
+ * then the BO is being moved and we should
+ * store up the damage until later.
+ */
+ if (drm_can_sleep())
+ ret = ast_bo_reserve(bo, true);
+ if (ret) {
+ if (ret != -EBUSY)
+ return;
+
+ store_for_later = true;
+ }
+
+ x2 = x + width - 1;
+ y2 = y + height - 1;
+ spin_lock_irqsave(&afbdev->dirty_lock, flags);
+
+ if (afbdev->y1 < y)
+ y = afbdev->y1;
+ if (afbdev->y2 > y2)
+ y2 = afbdev->y2;
+ if (afbdev->x1 < x)
+ x = afbdev->x1;
+ if (afbdev->x2 > x2)
+ x2 = afbdev->x2;
+
+ if (store_for_later) {
+ afbdev->x1 = x;
+ afbdev->x2 = x2;
+ afbdev->y1 = y;
+ afbdev->y2 = y2;
+ spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
+ return;
+ }
+
+ afbdev->x1 = afbdev->y1 = INT_MAX;
+ afbdev->x2 = afbdev->y2 = 0;
+ spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
+
+ if (!bo->kmap.virtual) {
+ ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
+ if (ret) {
+ DRM_ERROR("failed to kmap fb updates\n");
+ ast_bo_unreserve(bo);
+ return;
+ }
+ unmap = true;
+ }
+ for (i = y; i <= y2; i++) {
+ /* assume equal stride for now */
+ src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
+ memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
+
+ }
+ if (unmap)
+ ttm_bo_kunmap(&bo->kmap);
+
+ ast_bo_unreserve(bo);
+}
+
+static void ast_fillrect(struct fb_info *info,
+ const struct fb_fillrect *rect)
+{
+ struct ast_fbdev *afbdev = info->par;
+ sys_fillrect(info, rect);
+ ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
+ rect->height);
+}
+
+static void ast_copyarea(struct fb_info *info,
+ const struct fb_copyarea *area)
+{
+ struct ast_fbdev *afbdev = info->par;
+ sys_copyarea(info, area);
+ ast_dirty_update(afbdev, area->dx, area->dy, area->width,
+ area->height);
+}
+
+static void ast_imageblit(struct fb_info *info,
+ const struct fb_image *image)
+{
+ struct ast_fbdev *afbdev = info->par;
+ sys_imageblit(info, image);
+ ast_dirty_update(afbdev, image->dx, image->dy, image->width,
+ image->height);
+}
+
+static struct fb_ops astfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = drm_fb_helper_check_var,
+ .fb_set_par = drm_fb_helper_set_par,
+ .fb_fillrect = ast_fillrect,
+ .fb_copyarea = ast_copyarea,
+ .fb_imageblit = ast_imageblit,
+ .fb_pan_display = drm_fb_helper_pan_display,
+ .fb_blank = drm_fb_helper_blank,
+ .fb_setcmap = drm_fb_helper_setcmap,
+ .fb_debug_enter = drm_fb_helper_debug_enter,
+ .fb_debug_leave = drm_fb_helper_debug_leave,
+};
+
+static int astfb_create_object(struct ast_fbdev *afbdev,
+ struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object **gobj_p)
+{
+ struct drm_device *dev = afbdev->helper.dev;
+ u32 bpp, depth;
+ u32 size;
+ struct drm_gem_object *gobj;
+
+ int ret = 0;
+ drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
+
+ size = mode_cmd->pitches[0] * mode_cmd->height;
+ ret = ast_gem_create(dev, size, true, &gobj);
+ if (ret)
+ return ret;
+
+ *gobj_p = gobj;
+ return ret;
+}
+
+static int astfb_create(struct drm_fb_helper *helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct ast_fbdev *afbdev =
+ container_of(helper, struct ast_fbdev, helper);
+ struct drm_device *dev = afbdev->helper.dev;
+ struct drm_mode_fb_cmd2 mode_cmd;
+ struct drm_framebuffer *fb;
+ struct fb_info *info;
+ int size, ret;
+ struct device *device = &dev->pdev->dev;
+ void *sysram;
+ struct drm_gem_object *gobj = NULL;
+ struct ast_bo *bo = NULL;
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+ mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
+
+ mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+ sizes->surface_depth);
+
+ size = mode_cmd.pitches[0] * mode_cmd.height;
+
+ ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
+ if (ret) {
+ DRM_ERROR("failed to create fbcon backing object %d\n", ret);
+ return ret;
+ }
+ bo = gem_to_ast_bo(gobj);
+
+ sysram = vmalloc(size);
+ if (!sysram)
+ return -ENOMEM;
+
+ info = framebuffer_alloc(0, device);
+ if (!info) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ info->par = afbdev;
+
+ ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
+ if (ret)
+ goto out;
+
+ afbdev->sysram = sysram;
+ afbdev->size = size;
+
+ fb = &afbdev->afb.base;
+ afbdev->helper.fb = fb;
+ afbdev->helper.fbdev = info;
+
+ strcpy(info->fix.id, "astdrmfb");
+
+ info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
+ info->fbops = &astfb_ops;
+
+ ret = fb_alloc_cmap(&info->cmap, 256, 0);
+ if (ret) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ info->apertures = alloc_apertures(1);
+ if (!info->apertures) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
+ info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
+
+ drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
+ drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
+
+ info->screen_base = sysram;
+ info->screen_size = size;
+
+ info->pixmap.flags = FB_PIXMAP_SYSTEM;
+
+ DRM_DEBUG_KMS("allocated %dx%d\n",
+ fb->width, fb->height);
+
+ return 0;
+out:
+ return ret;
+}
+
+static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
+ u16 blue, int regno)
+{
+ struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
+ ast_crtc->lut_r[regno] = red >> 8;
+ ast_crtc->lut_g[regno] = green >> 8;
+ ast_crtc->lut_b[regno] = blue >> 8;
+}
+
+static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
+ u16 *blue, int regno)
+{
+ struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
+ *red = ast_crtc->lut_r[regno] << 8;
+ *green = ast_crtc->lut_g[regno] << 8;
+ *blue = ast_crtc->lut_b[regno] << 8;
+}
+
+static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
+ .gamma_set = ast_fb_gamma_set,
+ .gamma_get = ast_fb_gamma_get,
+ .fb_probe = astfb_create,
+};
+
+static void ast_fbdev_destroy(struct drm_device *dev,
+ struct ast_fbdev *afbdev)
+{
+ struct fb_info *info;
+ struct ast_framebuffer *afb = &afbdev->afb;
+ if (afbdev->helper.fbdev) {
+ info = afbdev->helper.fbdev;
+ unregister_framebuffer(info);
+ if (info->cmap.len)
+ fb_dealloc_cmap(&info->cmap);
+ framebuffer_release(info);
+ }
+
+ if (afb->obj) {
+ drm_gem_object_unreference_unlocked(afb->obj);
+ afb->obj = NULL;
+ }
+ drm_fb_helper_fini(&afbdev->helper);
+
+ vfree(afbdev->sysram);
+ drm_framebuffer_unregister_private(&afb->base);
+ drm_framebuffer_cleanup(&afb->base);
+}
+
+int ast_fbdev_init(struct drm_device *dev)
+{
+ struct ast_private *ast = dev->dev_private;
+ struct ast_fbdev *afbdev;
+ int ret;
+
+ afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
+ if (!afbdev)
+ return -ENOMEM;
+
+ ast->fbdev = afbdev;
+ spin_lock_init(&afbdev->dirty_lock);
+
+ drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
+
+ ret = drm_fb_helper_init(dev, &afbdev->helper,
+ 1, 1);
+ if (ret)
+ goto free;
+
+ ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
+ if (ret)
+ goto fini;
+
+ /* disable all the possible outputs/crtcs before entering KMS mode */
+ drm_helper_disable_unused_functions(dev);
+
+ ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
+ if (ret)
+ goto fini;
+
+ return 0;
+
+fini:
+ drm_fb_helper_fini(&afbdev->helper);
+free:
+ kfree(afbdev);
+ return ret;
+}
+
+void ast_fbdev_fini(struct drm_device *dev)
+{
+ struct ast_private *ast = dev->dev_private;
+
+ if (!ast->fbdev)
+ return;
+
+ ast_fbdev_destroy(dev, ast->fbdev);
+ kfree(ast->fbdev);
+ ast->fbdev = NULL;
+}
+
+void ast_fbdev_set_suspend(struct drm_device *dev, int state)
+{
+ struct ast_private *ast = dev->dev_private;
+
+ if (!ast->fbdev)
+ return;
+
+ fb_set_suspend(ast->fbdev->helper.fbdev, state);
+}
Code Review / kvmfornfv.git / blobdiff