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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/armada/armada_fbdev.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/armada/armada_fbdev.c')
-rw-r--r-- | drivers/gpu/drm/armada/armada_fbdev.c | 167 |
1 files changed, 167 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 000000000..38f5170c0 --- /dev/null +++ b/drivers/gpu/drm/armada/armada_fbdev.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2012 Russell King + * Written from the i915 driver. + */ + +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include <drm/drm_fb_helper.h> +#include <drm/drm_fourcc.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, + DRM_FB_HELPER_DEFAULT_OPS, + .fb_fillrect = drm_fb_helper_cfb_fillrect, + .fb_copyarea = drm_fb_helper_cfb_copyarea, + .fb_imageblit = drm_fb_helper_cfb_imageblit, +}; + +static int armada_fbdev_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_put(&obj->obj); + return ret; + } + + ptr = armada_gem_map_object(dev, obj); + if (!ptr) { + drm_gem_object_put(&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_put(&obj->obj); + + if (IS_ERR(dfb)) + return PTR_ERR(dfb); + + info = drm_fb_helper_alloc_fbi(fbh); + if (IS_ERR(info)) { + ret = PTR_ERR(info); + goto err_fballoc; + } + + 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; + + drm_fb_helper_fill_info(info, fbh, sizes); + + DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n", + dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8, + (unsigned long long)obj->phys_addr); + + return 0; + + 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_fbdev_create(fbh, sizes); + if (ret == 0) + ret = 1; + } + return ret; +} + +static const struct drm_fb_helper_funcs armada_fb_helper_funcs = { + .fb_probe = armada_fb_probe, +}; + +int armada_fbdev_init(struct drm_device *dev) +{ + struct armada_private *priv = drm_to_armada_dev(dev); + struct drm_fb_helper *fbh; + int ret; + + fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL); + if (!fbh) + return -ENOMEM; + + priv->fbdev = fbh; + + drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs); + + ret = drm_fb_helper_init(dev, fbh); + if (ret) { + DRM_ERROR("failed to initialize drm fb helper\n"); + goto err_fb_helper; + } + + 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 = drm_to_armada_dev(dev); + struct drm_fb_helper *fbh = priv->fbdev; + + if (fbh) { + drm_fb_helper_unregister_fbi(fbh); + + drm_fb_helper_fini(fbh); + + if (fbh->fb) + fbh->fb->funcs->destroy(fbh->fb); + + priv->fbdev = NULL; + } +} |