1 files changed, 202 insertions, 0 deletions

diff --git a/drivers/gpu/drm/armada/armada_fbdev.c b/drivers/gpu/drm/armada/armada_fbdev.c
new file mode 100644
index 000000000000..dd5ea77dac96
--- /dev/null
+++ b/drivers/gpu/drm/armada/armada_fbdev.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2012 Russell King
+ *  Written from the i915 driver.
+ *
+ * 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.
+ */
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_fb_helper.h>
+#include "armada_crtc.h"
+#include "armada_drm.h"
+#include "armada_fb.h"
+#include "armada_gem.h"
+
+static /*const*/ struct fb_ops armada_fb_ops = {
+        .owner          = THIS_MODULE,
+        .fb_check_var   = drm_fb_helper_check_var,
+        .fb_set_par     = drm_fb_helper_set_par,
+        .fb_fillrect    = cfb_fillrect,
+        .fb_copyarea    = cfb_copyarea,
+        .fb_imageblit   = cfb_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 armada_fb_create(struct drm_fb_helper *fbh,
+        struct drm_fb_helper_surface_size *sizes)
+{
+        struct drm_device *dev = fbh->dev;
+        struct drm_mode_fb_cmd2 mode;
+        struct armada_framebuffer *dfb;
+        struct armada_gem_object *obj;
+        struct fb_info *info;
+        int size, ret;
+        void *ptr;
+
+        memset(&mode, 0, sizeof(mode));
+        mode.width = sizes->surface_width;
+        mode.height = sizes->surface_height;
+        mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
+        mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
+                                        sizes->surface_depth);
+
+        size = mode.pitches[0] * mode.height;
+        obj = armada_gem_alloc_private_object(dev, size);
+        if (!obj) {
+                DRM_ERROR("failed to allocate fb memory\n");
+                return -ENOMEM;
+        }
+
+        ret = armada_gem_linear_back(dev, obj);
+        if (ret) {
+                drm_gem_object_unreference_unlocked(&obj->obj);
+                return ret;
+        }
+
+        ptr = armada_gem_map_object(dev, obj);
+        if (!ptr) {
+                drm_gem_object_unreference_unlocked(&obj->obj);
+                return -ENOMEM;
+        }
+
+        dfb = armada_framebuffer_create(dev, &mode, obj);
+
+        /*
+         * A reference is now held by the framebuffer object if
+         * successful, otherwise this drops the ref for the error path.
+         */
+        drm_gem_object_unreference_unlocked(&obj->obj);
+
+        if (IS_ERR(dfb))
+                return PTR_ERR(dfb);
+
+        info = framebuffer_alloc(0, dev->dev);
+        if (!info) {
+                ret = -ENOMEM;
+                goto err_fballoc;
+        }
+
+        ret = fb_alloc_cmap(&info->cmap, 256, 0);
+        if (ret) {
+                ret = -ENOMEM;
+                goto err_fbcmap;
+        }
+
+        strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
+        info->par = fbh;
+        info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
+        info->fbops = &armada_fb_ops;
+        info->fix.smem_start = obj->phys_addr;
+        info->fix.smem_len = obj->obj.size;
+        info->screen_size = obj->obj.size;
+        info->screen_base = ptr;
+        fbh->fb = &dfb->fb;
+        fbh->fbdev = info;
+        drm_fb_helper_fill_fix(info, dfb->fb.pitches[0], dfb->fb.depth);
+        drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
+
+        DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08x\n",
+                dfb->fb.width, dfb->fb.height,
+                dfb->fb.bits_per_pixel, obj->phys_addr);
+
+        return 0;
+
+ err_fbcmap:
+        framebuffer_release(info);
+ err_fballoc:
+        dfb->fb.funcs->destroy(&dfb->fb);
+        return ret;
+}
+
+static int armada_fb_probe(struct drm_fb_helper *fbh,
+        struct drm_fb_helper_surface_size *sizes)
+{
+        int ret = 0;
+
+        if (!fbh->fb) {
+                ret = armada_fb_create(fbh, sizes);
+                if (ret == 0)
+                        ret = 1;
+        }
+        return ret;
+}
+
+static struct drm_fb_helper_funcs armada_fb_helper_funcs = {
+        .gamma_set      = armada_drm_crtc_gamma_set,
+        .gamma_get      = armada_drm_crtc_gamma_get,
+        .fb_probe       = armada_fb_probe,
+};
+
+int armada_fbdev_init(struct drm_device *dev)
+{
+        struct armada_private *priv = dev->dev_private;
+        struct drm_fb_helper *fbh;
+        int ret;
+
+        fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
+        if (!fbh)
+                return -ENOMEM;
+
+        priv->fbdev = fbh;
+
+        fbh->funcs = &armada_fb_helper_funcs;
+
+        ret = drm_fb_helper_init(dev, fbh, 1, 1);
+        if (ret) {
+                DRM_ERROR("failed to initialize drm fb helper\n");
+                goto err_fb_helper;
+        }
+
+        ret = drm_fb_helper_single_add_all_connectors(fbh);
+        if (ret) {
+                DRM_ERROR("failed to add fb connectors\n");
+                goto err_fb_setup;
+        }
+
+        ret = drm_fb_helper_initial_config(fbh, 32);
+        if (ret) {
+                DRM_ERROR("failed to set initial config\n");
+                goto err_fb_setup;
+        }
+
+        return 0;
+ err_fb_setup:
+        drm_fb_helper_fini(fbh);
+ err_fb_helper:
+        priv->fbdev = NULL;
+        return ret;
+}
+
+void armada_fbdev_fini(struct drm_device *dev)
+{
+        struct armada_private *priv = dev->dev_private;
+        struct drm_fb_helper *fbh = priv->fbdev;
+
+        if (fbh) {
+                struct fb_info *info = fbh->fbdev;
+
+                if (info) {
+                        unregister_framebuffer(info);
+                        if (info->cmap.len)
+                                fb_dealloc_cmap(&info->cmap);
+                        framebuffer_release(info);
+                }
+
+                if (fbh->fb)
+                        fbh->fb->funcs->destroy(fbh->fb);
+
+                drm_fb_helper_fini(fbh);
+
+                priv->fbdev = NULL;
+        }
+}