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346 lines
8.5 KiB
346 lines
8.5 KiB
/*
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* Copyright 2012 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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*/
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/*
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* Authors: Dave Airlie <airlied@redhat.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/tty.h>
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#include <linux/sysrq.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include "ast_drv.h"
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static void ast_dirty_update(struct ast_fbdev *afbdev,
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int x, int y, int width, int height)
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{
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int i;
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struct drm_gem_object *obj;
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struct ast_bo *bo;
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int src_offset, dst_offset;
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int bpp = afbdev->afb.base.format->cpp[0];
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int ret = -EBUSY;
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bool unmap = false;
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bool store_for_later = false;
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int x2, y2;
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unsigned long flags;
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obj = afbdev->afb.obj;
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bo = gem_to_ast_bo(obj);
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/*
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* try and reserve the BO, if we fail with busy
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* then the BO is being moved and we should
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* store up the damage until later.
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*/
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if (drm_can_sleep())
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ret = ast_bo_reserve(bo, true);
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if (ret) {
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if (ret != -EBUSY)
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return;
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store_for_later = true;
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}
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x2 = x + width - 1;
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y2 = y + height - 1;
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spin_lock_irqsave(&afbdev->dirty_lock, flags);
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if (afbdev->y1 < y)
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y = afbdev->y1;
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if (afbdev->y2 > y2)
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y2 = afbdev->y2;
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if (afbdev->x1 < x)
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x = afbdev->x1;
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if (afbdev->x2 > x2)
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x2 = afbdev->x2;
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if (store_for_later) {
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afbdev->x1 = x;
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afbdev->x2 = x2;
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afbdev->y1 = y;
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afbdev->y2 = y2;
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spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
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return;
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}
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afbdev->x1 = afbdev->y1 = INT_MAX;
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afbdev->x2 = afbdev->y2 = 0;
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spin_unlock_irqrestore(&afbdev->dirty_lock, flags);
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if (!bo->kmap.virtual) {
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ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
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if (ret) {
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DRM_ERROR("failed to kmap fb updates\n");
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ast_bo_unreserve(bo);
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return;
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}
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unmap = true;
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}
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for (i = y; i <= y2; i++) {
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/* assume equal stride for now */
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src_offset = dst_offset = i * afbdev->afb.base.pitches[0] + (x * bpp);
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memcpy_toio(bo->kmap.virtual + src_offset, afbdev->sysram + src_offset, (x2 - x + 1) * bpp);
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}
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if (unmap)
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ttm_bo_kunmap(&bo->kmap);
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ast_bo_unreserve(bo);
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}
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static void ast_fillrect(struct fb_info *info,
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const struct fb_fillrect *rect)
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{
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struct ast_fbdev *afbdev = info->par;
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drm_fb_helper_sys_fillrect(info, rect);
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ast_dirty_update(afbdev, rect->dx, rect->dy, rect->width,
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rect->height);
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}
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static void ast_copyarea(struct fb_info *info,
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const struct fb_copyarea *area)
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{
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struct ast_fbdev *afbdev = info->par;
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drm_fb_helper_sys_copyarea(info, area);
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ast_dirty_update(afbdev, area->dx, area->dy, area->width,
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area->height);
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}
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static void ast_imageblit(struct fb_info *info,
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const struct fb_image *image)
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{
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struct ast_fbdev *afbdev = info->par;
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drm_fb_helper_sys_imageblit(info, image);
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ast_dirty_update(afbdev, image->dx, image->dy, image->width,
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image->height);
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}
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static struct fb_ops astfb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = drm_fb_helper_check_var,
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.fb_set_par = drm_fb_helper_set_par,
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.fb_fillrect = ast_fillrect,
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.fb_copyarea = ast_copyarea,
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.fb_imageblit = ast_imageblit,
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.fb_pan_display = drm_fb_helper_pan_display,
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.fb_blank = drm_fb_helper_blank,
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.fb_setcmap = drm_fb_helper_setcmap,
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.fb_debug_enter = drm_fb_helper_debug_enter,
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.fb_debug_leave = drm_fb_helper_debug_leave,
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};
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static int astfb_create_object(struct ast_fbdev *afbdev,
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const struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object **gobj_p)
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{
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struct drm_device *dev = afbdev->helper.dev;
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u32 size;
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struct drm_gem_object *gobj;
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int ret = 0;
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size = mode_cmd->pitches[0] * mode_cmd->height;
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ret = ast_gem_create(dev, size, true, &gobj);
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if (ret)
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return ret;
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*gobj_p = gobj;
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return ret;
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}
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static int astfb_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct ast_fbdev *afbdev =
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container_of(helper, struct ast_fbdev, helper);
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struct drm_device *dev = afbdev->helper.dev;
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struct drm_mode_fb_cmd2 mode_cmd;
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struct drm_framebuffer *fb;
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struct fb_info *info;
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int size, ret;
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void *sysram;
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struct drm_gem_object *gobj = NULL;
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struct ast_bo *bo = NULL;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7)/8);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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ret = astfb_create_object(afbdev, &mode_cmd, &gobj);
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if (ret) {
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DRM_ERROR("failed to create fbcon backing object %d\n", ret);
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return ret;
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}
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bo = gem_to_ast_bo(gobj);
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sysram = vmalloc(size);
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if (!sysram)
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return -ENOMEM;
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info = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(info)) {
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ret = PTR_ERR(info);
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goto out;
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}
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info->par = afbdev;
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ret = ast_framebuffer_init(dev, &afbdev->afb, &mode_cmd, gobj);
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if (ret)
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goto out;
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afbdev->sysram = sysram;
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afbdev->size = size;
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fb = &afbdev->afb.base;
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afbdev->helper.fb = fb;
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strcpy(info->fix.id, "astdrmfb");
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info->fbops = &astfb_ops;
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info->apertures->ranges[0].base = pci_resource_start(dev->pdev, 0);
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info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
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drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
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drm_fb_helper_fill_var(info, &afbdev->helper, sizes->fb_width, sizes->fb_height);
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info->screen_base = sysram;
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info->screen_size = size;
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info->pixmap.flags = FB_PIXMAP_SYSTEM;
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DRM_DEBUG_KMS("allocated %dx%d\n",
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fb->width, fb->height);
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return 0;
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out:
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vfree(sysram);
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return ret;
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}
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static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
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.fb_probe = astfb_create,
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};
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static void ast_fbdev_destroy(struct drm_device *dev,
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struct ast_fbdev *afbdev)
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{
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struct ast_framebuffer *afb = &afbdev->afb;
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drm_crtc_force_disable_all(dev);
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drm_fb_helper_unregister_fbi(&afbdev->helper);
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if (afb->obj) {
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drm_gem_object_put_unlocked(afb->obj);
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afb->obj = NULL;
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}
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drm_fb_helper_fini(&afbdev->helper);
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vfree(afbdev->sysram);
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drm_framebuffer_unregister_private(&afb->base);
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drm_framebuffer_cleanup(&afb->base);
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}
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int ast_fbdev_init(struct drm_device *dev)
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{
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struct ast_private *ast = dev->dev_private;
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struct ast_fbdev *afbdev;
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int ret;
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afbdev = kzalloc(sizeof(struct ast_fbdev), GFP_KERNEL);
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if (!afbdev)
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return -ENOMEM;
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ast->fbdev = afbdev;
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spin_lock_init(&afbdev->dirty_lock);
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drm_fb_helper_prepare(dev, &afbdev->helper, &ast_fb_helper_funcs);
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ret = drm_fb_helper_init(dev, &afbdev->helper, 1);
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if (ret)
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goto free;
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ret = drm_fb_helper_single_add_all_connectors(&afbdev->helper);
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if (ret)
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goto fini;
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/* disable all the possible outputs/crtcs before entering KMS mode */
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drm_helper_disable_unused_functions(dev);
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ret = drm_fb_helper_initial_config(&afbdev->helper, 32);
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if (ret)
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goto fini;
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return 0;
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fini:
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drm_fb_helper_fini(&afbdev->helper);
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free:
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kfree(afbdev);
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return ret;
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}
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void ast_fbdev_fini(struct drm_device *dev)
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{
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struct ast_private *ast = dev->dev_private;
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if (!ast->fbdev)
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return;
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ast_fbdev_destroy(dev, ast->fbdev);
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kfree(ast->fbdev);
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ast->fbdev = NULL;
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}
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void ast_fbdev_set_suspend(struct drm_device *dev, int state)
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{
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struct ast_private *ast = dev->dev_private;
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if (!ast->fbdev)
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return;
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drm_fb_helper_set_suspend(&ast->fbdev->helper, state);
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}
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void ast_fbdev_set_base(struct ast_private *ast, unsigned long gpu_addr)
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{
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ast->fbdev->helper.fbdev->fix.smem_start =
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ast->fbdev->helper.fbdev->apertures->ranges[0].base + gpu_addr;
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ast->fbdev->helper.fbdev->fix.smem_len = ast->vram_size - gpu_addr;
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}
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