diff options
Diffstat (limited to 'drivers/gpu/drm/armada/armada_fbdev.c')
| -rw-r--r-- | drivers/gpu/drm/armada/armada_fbdev.c | 202 |
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; + } +} |