.. kernel-doc:: drivers/gpu/drm/drm_fb_helper.c
:export:
-.. kernel-doc:: drivers/gpu/drm/drm_fbdev_generic.c
+.. kernel-doc:: drivers/gpu/drm/drm_fbdev_ttm.c
:export:
format Helper Functions Reference
obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o
drm_ttm_helper-y := drm_gem_ttm_helper.o
+drm_ttm_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fbdev_ttm.o
obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o
#
drm_self_refresh_helper.o \
drm_simple_kms_helper.o
drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
-drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += \
- drm_fbdev_generic.o \
- drm_fb_helper.o
+drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
#
#include <drm/amdgpu_drm.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_gem.h>
#include <drm/drm_managed.h>
#include <drm/drm_pciids.h>
!list_empty(&adev_to_drm(adev)->mode_config.connector_list)) {
/* select 8 bpp console on low vram cards */
if (adev->gmc.real_vram_size <= (32*1024*1024))
- drm_fbdev_generic_setup(adev_to_drm(adev), 8);
+ drm_fbdev_ttm_setup(adev_to_drm(adev), 8);
else
- drm_fbdev_generic_setup(adev_to_drm(adev), 32);
+ drm_fbdev_ttm_setup(adev_to_drm(adev), 32);
}
ret = amdgpu_debugfs_init(adev);
+++ /dev/null
-// SPDX-License-Identifier: MIT
-
-#include <linux/moduleparam.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_framebuffer.h>
-#include <drm/drm_gem.h>
-#include <drm/drm_print.h>
-
-#include <drm/drm_fbdev_generic.h>
-
-/* @user: 1=userspace, 0=fbcon */
-static int drm_fbdev_generic_fb_open(struct fb_info *info, int user)
-{
- struct drm_fb_helper *fb_helper = info->par;
-
- /* No need to take a ref for fbcon because it unbinds on unregister */
- if (user && !try_module_get(fb_helper->dev->driver->fops->owner))
- return -ENODEV;
-
- return 0;
-}
-
-static int drm_fbdev_generic_fb_release(struct fb_info *info, int user)
-{
- struct drm_fb_helper *fb_helper = info->par;
-
- if (user)
- module_put(fb_helper->dev->driver->fops->owner);
-
- return 0;
-}
-
-FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(drm_fbdev_generic,
- drm_fb_helper_damage_range,
- drm_fb_helper_damage_area);
-
-static void drm_fbdev_generic_fb_destroy(struct fb_info *info)
-{
- struct drm_fb_helper *fb_helper = info->par;
- void *shadow = info->screen_buffer;
-
- if (!fb_helper->dev)
- return;
-
- fb_deferred_io_cleanup(info);
- drm_fb_helper_fini(fb_helper);
- vfree(shadow);
- drm_client_framebuffer_delete(fb_helper->buffer);
-
- drm_client_release(&fb_helper->client);
- drm_fb_helper_unprepare(fb_helper);
- kfree(fb_helper);
-}
-
-static const struct fb_ops drm_fbdev_generic_fb_ops = {
- .owner = THIS_MODULE,
- .fb_open = drm_fbdev_generic_fb_open,
- .fb_release = drm_fbdev_generic_fb_release,
- FB_DEFAULT_DEFERRED_OPS(drm_fbdev_generic),
- DRM_FB_HELPER_DEFAULT_OPS,
- .fb_destroy = drm_fbdev_generic_fb_destroy,
-};
-
-/*
- * This function uses the client API to create a framebuffer backed by a dumb buffer.
- */
-static int drm_fbdev_generic_helper_fb_probe(struct drm_fb_helper *fb_helper,
- struct drm_fb_helper_surface_size *sizes)
-{
- struct drm_client_dev *client = &fb_helper->client;
- struct drm_device *dev = fb_helper->dev;
- struct drm_client_buffer *buffer;
- struct fb_info *info;
- size_t screen_size;
- void *screen_buffer;
- u32 format;
- int ret;
-
- drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",
- sizes->surface_width, sizes->surface_height,
- sizes->surface_bpp);
-
- format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
- buffer = drm_client_framebuffer_create(client, sizes->surface_width,
- sizes->surface_height, format);
- if (IS_ERR(buffer))
- return PTR_ERR(buffer);
-
- fb_helper->buffer = buffer;
- fb_helper->fb = buffer->fb;
-
- screen_size = buffer->gem->size;
- screen_buffer = vzalloc(screen_size);
- if (!screen_buffer) {
- ret = -ENOMEM;
- goto err_drm_client_framebuffer_delete;
- }
-
- info = drm_fb_helper_alloc_info(fb_helper);
- if (IS_ERR(info)) {
- ret = PTR_ERR(info);
- goto err_vfree;
- }
-
- drm_fb_helper_fill_info(info, fb_helper, sizes);
-
- info->fbops = &drm_fbdev_generic_fb_ops;
-
- /* screen */
- info->flags |= FBINFO_VIRTFB | FBINFO_READS_FAST;
- info->screen_buffer = screen_buffer;
- info->fix.smem_len = screen_size;
-
- /* deferred I/O */
- fb_helper->fbdefio.delay = HZ / 20;
- fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io;
-
- info->fbdefio = &fb_helper->fbdefio;
- ret = fb_deferred_io_init(info);
- if (ret)
- goto err_drm_fb_helper_release_info;
-
- return 0;
-
-err_drm_fb_helper_release_info:
- drm_fb_helper_release_info(fb_helper);
-err_vfree:
- vfree(screen_buffer);
-err_drm_client_framebuffer_delete:
- fb_helper->fb = NULL;
- fb_helper->buffer = NULL;
- drm_client_framebuffer_delete(buffer);
- return ret;
-}
-
-static void drm_fbdev_generic_damage_blit_real(struct drm_fb_helper *fb_helper,
- struct drm_clip_rect *clip,
- struct iosys_map *dst)
-{
- struct drm_framebuffer *fb = fb_helper->fb;
- size_t offset = clip->y1 * fb->pitches[0];
- size_t len = clip->x2 - clip->x1;
- unsigned int y;
- void *src;
-
- switch (drm_format_info_bpp(fb->format, 0)) {
- case 1:
- offset += clip->x1 / 8;
- len = DIV_ROUND_UP(len + clip->x1 % 8, 8);
- break;
- case 2:
- offset += clip->x1 / 4;
- len = DIV_ROUND_UP(len + clip->x1 % 4, 4);
- break;
- case 4:
- offset += clip->x1 / 2;
- len = DIV_ROUND_UP(len + clip->x1 % 2, 2);
- break;
- default:
- offset += clip->x1 * fb->format->cpp[0];
- len *= fb->format->cpp[0];
- break;
- }
-
- src = fb_helper->info->screen_buffer + offset;
- iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
-
- for (y = clip->y1; y < clip->y2; y++) {
- iosys_map_memcpy_to(dst, 0, src, len);
- iosys_map_incr(dst, fb->pitches[0]);
- src += fb->pitches[0];
- }
-}
-
-static int drm_fbdev_generic_damage_blit(struct drm_fb_helper *fb_helper,
- struct drm_clip_rect *clip)
-{
- struct drm_client_buffer *buffer = fb_helper->buffer;
- struct iosys_map map, dst;
- int ret;
-
- /*
- * We have to pin the client buffer to its current location while
- * flushing the shadow buffer. In the general case, concurrent
- * modesetting operations could try to move the buffer and would
- * fail. The modeset has to be serialized by acquiring the reservation
- * object of the underlying BO here.
- *
- * For fbdev emulation, we only have to protect against fbdev modeset
- * operations. Nothing else will involve the client buffer's BO. So it
- * is sufficient to acquire struct drm_fb_helper.lock here.
- */
- mutex_lock(&fb_helper->lock);
-
- ret = drm_client_buffer_vmap_local(buffer, &map);
- if (ret)
- goto out;
-
- dst = map;
- drm_fbdev_generic_damage_blit_real(fb_helper, clip, &dst);
-
- drm_client_buffer_vunmap_local(buffer);
-
-out:
- mutex_unlock(&fb_helper->lock);
-
- return ret;
-}
-
-static int drm_fbdev_generic_helper_fb_dirty(struct drm_fb_helper *helper,
- struct drm_clip_rect *clip)
-{
- struct drm_device *dev = helper->dev;
- int ret;
-
- /* Call damage handlers only if necessary */
- if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
- return 0;
-
- ret = drm_fbdev_generic_damage_blit(helper, clip);
- if (drm_WARN_ONCE(dev, ret, "Damage blitter failed: ret=%d\n", ret))
- return ret;
-
- if (helper->fb->funcs->dirty) {
- ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
- if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))
- return ret;
- }
-
- return 0;
-}
-
-static const struct drm_fb_helper_funcs drm_fbdev_generic_helper_funcs = {
- .fb_probe = drm_fbdev_generic_helper_fb_probe,
- .fb_dirty = drm_fbdev_generic_helper_fb_dirty,
-};
-
-static void drm_fbdev_generic_client_unregister(struct drm_client_dev *client)
-{
- struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
-
- if (fb_helper->info) {
- drm_fb_helper_unregister_info(fb_helper);
- } else {
- drm_client_release(&fb_helper->client);
- drm_fb_helper_unprepare(fb_helper);
- kfree(fb_helper);
- }
-}
-
-static int drm_fbdev_generic_client_restore(struct drm_client_dev *client)
-{
- drm_fb_helper_lastclose(client->dev);
-
- return 0;
-}
-
-static int drm_fbdev_generic_client_hotplug(struct drm_client_dev *client)
-{
- struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
- struct drm_device *dev = client->dev;
- int ret;
-
- if (dev->fb_helper)
- return drm_fb_helper_hotplug_event(dev->fb_helper);
-
- ret = drm_fb_helper_init(dev, fb_helper);
- if (ret)
- goto err_drm_err;
-
- if (!drm_drv_uses_atomic_modeset(dev))
- drm_helper_disable_unused_functions(dev);
-
- ret = drm_fb_helper_initial_config(fb_helper);
- if (ret)
- goto err_drm_fb_helper_fini;
-
- return 0;
-
-err_drm_fb_helper_fini:
- drm_fb_helper_fini(fb_helper);
-err_drm_err:
- drm_err(dev, "fbdev: Failed to setup generic emulation (ret=%d)\n", ret);
- return ret;
-}
-
-static const struct drm_client_funcs drm_fbdev_generic_client_funcs = {
- .owner = THIS_MODULE,
- .unregister = drm_fbdev_generic_client_unregister,
- .restore = drm_fbdev_generic_client_restore,
- .hotplug = drm_fbdev_generic_client_hotplug,
-};
-
-/**
- * drm_fbdev_generic_setup() - Setup generic fbdev emulation
- * @dev: DRM device
- * @preferred_bpp: Preferred bits per pixel for the device.
- *
- * This function sets up generic fbdev emulation for drivers that supports
- * dumb buffers with a virtual address and that can be mmap'ed.
- * drm_fbdev_generic_setup() shall be called after the DRM driver registered
- * the new DRM device with drm_dev_register().
- *
- * Restore, hotplug events and teardown are all taken care of. Drivers that do
- * suspend/resume need to call drm_fb_helper_set_suspend_unlocked() themselves.
- * Simple drivers might use drm_mode_config_helper_suspend().
- *
- * In order to provide fixed mmap-able memory ranges, generic fbdev emulation
- * uses a shadow buffer in system memory. The implementation blits the shadow
- * fbdev buffer onto the real buffer in regular intervals.
- *
- * This function is safe to call even when there are no connectors present.
- * Setup will be retried on the next hotplug event.
- *
- * The fbdev is destroyed by drm_dev_unregister().
- */
-void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp)
-{
- struct drm_fb_helper *fb_helper;
- int ret;
-
- drm_WARN(dev, !dev->registered, "Device has not been registered.\n");
- drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n");
-
- fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
- if (!fb_helper)
- return;
- drm_fb_helper_prepare(dev, fb_helper, preferred_bpp, &drm_fbdev_generic_helper_funcs);
-
- ret = drm_client_init(dev, &fb_helper->client, "fbdev", &drm_fbdev_generic_client_funcs);
- if (ret) {
- drm_err(dev, "Failed to register client: %d\n", ret);
- goto err_drm_client_init;
- }
-
- drm_client_register(&fb_helper->client);
-
- return;
-
-err_drm_client_init:
- drm_fb_helper_unprepare(fb_helper);
- kfree(fb_helper);
- return;
-}
-EXPORT_SYMBOL(drm_fbdev_generic_setup);
--- /dev/null
+// SPDX-License-Identifier: MIT
+
+#include <linux/moduleparam.h>
+#include <linux/vmalloc.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_print.h>
+
+#include <drm/drm_fbdev_ttm.h>
+
+/* @user: 1=userspace, 0=fbcon */
+static int drm_fbdev_ttm_fb_open(struct fb_info *info, int user)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+
+ /* No need to take a ref for fbcon because it unbinds on unregister */
+ if (user && !try_module_get(fb_helper->dev->driver->fops->owner))
+ return -ENODEV;
+
+ return 0;
+}
+
+static int drm_fbdev_ttm_fb_release(struct fb_info *info, int user)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+
+ if (user)
+ module_put(fb_helper->dev->driver->fops->owner);
+
+ return 0;
+}
+
+FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(drm_fbdev_ttm,
+ drm_fb_helper_damage_range,
+ drm_fb_helper_damage_area);
+
+static void drm_fbdev_ttm_fb_destroy(struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ void *shadow = info->screen_buffer;
+
+ if (!fb_helper->dev)
+ return;
+
+ fb_deferred_io_cleanup(info);
+ drm_fb_helper_fini(fb_helper);
+ vfree(shadow);
+ drm_client_framebuffer_delete(fb_helper->buffer);
+
+ drm_client_release(&fb_helper->client);
+ drm_fb_helper_unprepare(fb_helper);
+ kfree(fb_helper);
+}
+
+static const struct fb_ops drm_fbdev_ttm_fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_open = drm_fbdev_ttm_fb_open,
+ .fb_release = drm_fbdev_ttm_fb_release,
+ FB_DEFAULT_DEFERRED_OPS(drm_fbdev_ttm),
+ DRM_FB_HELPER_DEFAULT_OPS,
+ .fb_destroy = drm_fbdev_ttm_fb_destroy,
+};
+
+/*
+ * This function uses the client API to create a framebuffer backed by a dumb buffer.
+ */
+static int drm_fbdev_ttm_helper_fb_probe(struct drm_fb_helper *fb_helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct drm_client_dev *client = &fb_helper->client;
+ struct drm_device *dev = fb_helper->dev;
+ struct drm_client_buffer *buffer;
+ struct fb_info *info;
+ size_t screen_size;
+ void *screen_buffer;
+ u32 format;
+ int ret;
+
+ drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",
+ sizes->surface_width, sizes->surface_height,
+ sizes->surface_bpp);
+
+ format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
+ buffer = drm_client_framebuffer_create(client, sizes->surface_width,
+ sizes->surface_height, format);
+ if (IS_ERR(buffer))
+ return PTR_ERR(buffer);
+
+ fb_helper->buffer = buffer;
+ fb_helper->fb = buffer->fb;
+
+ screen_size = buffer->gem->size;
+ screen_buffer = vzalloc(screen_size);
+ if (!screen_buffer) {
+ ret = -ENOMEM;
+ goto err_drm_client_framebuffer_delete;
+ }
+
+ info = drm_fb_helper_alloc_info(fb_helper);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto err_vfree;
+ }
+
+ drm_fb_helper_fill_info(info, fb_helper, sizes);
+
+ info->fbops = &drm_fbdev_ttm_fb_ops;
+
+ /* screen */
+ info->flags |= FBINFO_VIRTFB | FBINFO_READS_FAST;
+ info->screen_buffer = screen_buffer;
+ info->fix.smem_len = screen_size;
+
+ /* deferred I/O */
+ fb_helper->fbdefio.delay = HZ / 20;
+ fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io;
+
+ info->fbdefio = &fb_helper->fbdefio;
+ ret = fb_deferred_io_init(info);
+ if (ret)
+ goto err_drm_fb_helper_release_info;
+
+ return 0;
+
+err_drm_fb_helper_release_info:
+ drm_fb_helper_release_info(fb_helper);
+err_vfree:
+ vfree(screen_buffer);
+err_drm_client_framebuffer_delete:
+ fb_helper->fb = NULL;
+ fb_helper->buffer = NULL;
+ drm_client_framebuffer_delete(buffer);
+ return ret;
+}
+
+static void drm_fbdev_ttm_damage_blit_real(struct drm_fb_helper *fb_helper,
+ struct drm_clip_rect *clip,
+ struct iosys_map *dst)
+{
+ struct drm_framebuffer *fb = fb_helper->fb;
+ size_t offset = clip->y1 * fb->pitches[0];
+ size_t len = clip->x2 - clip->x1;
+ unsigned int y;
+ void *src;
+
+ switch (drm_format_info_bpp(fb->format, 0)) {
+ case 1:
+ offset += clip->x1 / 8;
+ len = DIV_ROUND_UP(len + clip->x1 % 8, 8);
+ break;
+ case 2:
+ offset += clip->x1 / 4;
+ len = DIV_ROUND_UP(len + clip->x1 % 4, 4);
+ break;
+ case 4:
+ offset += clip->x1 / 2;
+ len = DIV_ROUND_UP(len + clip->x1 % 2, 2);
+ break;
+ default:
+ offset += clip->x1 * fb->format->cpp[0];
+ len *= fb->format->cpp[0];
+ break;
+ }
+
+ src = fb_helper->info->screen_buffer + offset;
+ iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
+
+ for (y = clip->y1; y < clip->y2; y++) {
+ iosys_map_memcpy_to(dst, 0, src, len);
+ iosys_map_incr(dst, fb->pitches[0]);
+ src += fb->pitches[0];
+ }
+}
+
+static int drm_fbdev_ttm_damage_blit(struct drm_fb_helper *fb_helper,
+ struct drm_clip_rect *clip)
+{
+ struct drm_client_buffer *buffer = fb_helper->buffer;
+ struct iosys_map map, dst;
+ int ret;
+
+ /*
+ * We have to pin the client buffer to its current location while
+ * flushing the shadow buffer. In the general case, concurrent
+ * modesetting operations could try to move the buffer and would
+ * fail. The modeset has to be serialized by acquiring the reservation
+ * object of the underlying BO here.
+ *
+ * For fbdev emulation, we only have to protect against fbdev modeset
+ * operations. Nothing else will involve the client buffer's BO. So it
+ * is sufficient to acquire struct drm_fb_helper.lock here.
+ */
+ mutex_lock(&fb_helper->lock);
+
+ ret = drm_client_buffer_vmap_local(buffer, &map);
+ if (ret)
+ goto out;
+
+ dst = map;
+ drm_fbdev_ttm_damage_blit_real(fb_helper, clip, &dst);
+
+ drm_client_buffer_vunmap_local(buffer);
+
+out:
+ mutex_unlock(&fb_helper->lock);
+
+ return ret;
+}
+
+static int drm_fbdev_ttm_helper_fb_dirty(struct drm_fb_helper *helper,
+ struct drm_clip_rect *clip)
+{
+ struct drm_device *dev = helper->dev;
+ int ret;
+
+ /* Call damage handlers only if necessary */
+ if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
+ return 0;
+
+ ret = drm_fbdev_ttm_damage_blit(helper, clip);
+ if (drm_WARN_ONCE(dev, ret, "Damage blitter failed: ret=%d\n", ret))
+ return ret;
+
+ if (helper->fb->funcs->dirty) {
+ ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
+ if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct drm_fb_helper_funcs drm_fbdev_ttm_helper_funcs = {
+ .fb_probe = drm_fbdev_ttm_helper_fb_probe,
+ .fb_dirty = drm_fbdev_ttm_helper_fb_dirty,
+};
+
+static void drm_fbdev_ttm_client_unregister(struct drm_client_dev *client)
+{
+ struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+
+ if (fb_helper->info) {
+ drm_fb_helper_unregister_info(fb_helper);
+ } else {
+ drm_client_release(&fb_helper->client);
+ drm_fb_helper_unprepare(fb_helper);
+ kfree(fb_helper);
+ }
+}
+
+static int drm_fbdev_ttm_client_restore(struct drm_client_dev *client)
+{
+ drm_fb_helper_lastclose(client->dev);
+
+ return 0;
+}
+
+static int drm_fbdev_ttm_client_hotplug(struct drm_client_dev *client)
+{
+ struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+ struct drm_device *dev = client->dev;
+ int ret;
+
+ if (dev->fb_helper)
+ return drm_fb_helper_hotplug_event(dev->fb_helper);
+
+ ret = drm_fb_helper_init(dev, fb_helper);
+ if (ret)
+ goto err_drm_err;
+
+ if (!drm_drv_uses_atomic_modeset(dev))
+ drm_helper_disable_unused_functions(dev);
+
+ ret = drm_fb_helper_initial_config(fb_helper);
+ if (ret)
+ goto err_drm_fb_helper_fini;
+
+ return 0;
+
+err_drm_fb_helper_fini:
+ drm_fb_helper_fini(fb_helper);
+err_drm_err:
+ drm_err(dev, "fbdev: Failed to setup emulation (ret=%d)\n", ret);
+ return ret;
+}
+
+static const struct drm_client_funcs drm_fbdev_ttm_client_funcs = {
+ .owner = THIS_MODULE,
+ .unregister = drm_fbdev_ttm_client_unregister,
+ .restore = drm_fbdev_ttm_client_restore,
+ .hotplug = drm_fbdev_ttm_client_hotplug,
+};
+
+/**
+ * drm_fbdev_ttm_setup() - Setup fbdev emulation for TTM-based drivers
+ * @dev: DRM device
+ * @preferred_bpp: Preferred bits per pixel for the device.
+ *
+ * This function sets up fbdev emulation for TTM-based drivers that support
+ * dumb buffers with a virtual address and that can be mmap'ed.
+ * drm_fbdev_ttm_setup() shall be called after the DRM driver registered
+ * the new DRM device with drm_dev_register().
+ *
+ * Restore, hotplug events and teardown are all taken care of. Drivers that do
+ * suspend/resume need to call drm_fb_helper_set_suspend_unlocked() themselves.
+ * Simple drivers might use drm_mode_config_helper_suspend().
+ *
+ * In order to provide fixed mmap-able memory ranges, fbdev emulation
+ * uses a shadow buffer in system memory. The implementation blits the shadow
+ * fbdev buffer onto the real buffer in regular intervals.
+ *
+ * This function is safe to call even when there are no connectors present.
+ * Setup will be retried on the next hotplug event.
+ *
+ * The fbdev is destroyed by drm_dev_unregister().
+ */
+void drm_fbdev_ttm_setup(struct drm_device *dev, unsigned int preferred_bpp)
+{
+ struct drm_fb_helper *fb_helper;
+ int ret;
+
+ drm_WARN(dev, !dev->registered, "Device has not been registered.\n");
+ drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n");
+
+ fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
+ if (!fb_helper)
+ return;
+ drm_fb_helper_prepare(dev, fb_helper, preferred_bpp, &drm_fbdev_ttm_helper_funcs);
+
+ ret = drm_client_init(dev, &fb_helper->client, "fbdev", &drm_fbdev_ttm_client_funcs);
+ if (ret) {
+ drm_err(dev, "Failed to register client: %d\n", ret);
+ goto err_drm_client_init;
+ }
+
+ drm_client_register(&fb_helper->client);
+
+ return;
+
+err_drm_client_init:
+ drm_fb_helper_unprepare(fb_helper);
+ kfree(fb_helper);
+ return;
+}
+EXPORT_SYMBOL(drm_fbdev_ttm_setup);
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_vram_helper.h>
#include <drm/drm_managed.h>
goto err_unload;
}
- drm_fbdev_generic_setup(dev, 32);
+ drm_fbdev_ttm_setup(dev, 32);
return 0;
depends on LOONGARCH || MIPS || COMPILE_TEST
select DRM_KMS_HELPER
select DRM_TTM
+ select DRM_TTM_HELPER
select I2C
select I2C_ALGOBIT
help
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_modeset_helper.h>
if (ret)
return ret;
- drm_fbdev_generic_setup(ddev, 32);
+ drm_fbdev_ttm_setup(ddev, 32);
return 0;
}
#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_vblank.h>
goto fail_drm_dev_init;
if (nouveau_drm(drm_dev)->client.device.info.ram_size <= 32 * 1024 * 1024)
- drm_fbdev_generic_setup(drm_dev, 8);
+ drm_fbdev_ttm_setup(drm_dev, 8);
else
- drm_fbdev_generic_setup(drm_dev, 32);
+ drm_fbdev_ttm_setup(drm_dev, 32);
quirk_broken_nv_runpm(pdev);
return 0;
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_file.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_module.h>
if (ret)
goto modeset_cleanup;
- drm_fbdev_generic_setup(&qdev->ddev, 32);
+ drm_fbdev_ttm_setup(&qdev->ddev, 32);
return 0;
modeset_cleanup:
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_framebuffer_helper.h>
if (ret)
goto err_hw_fini;
- drm_fbdev_generic_setup(dev, 32);
+ drm_fbdev_ttm_setup(dev, 32);
return ret;
err_hw_fini:
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_file.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_managed.h>
if (ret)
goto err_irq_fini;
- drm_fbdev_generic_setup(&vbox->ddev, 32);
+ drm_fbdev_ttm_setup(&vbox->ddev, 32);
return 0;
#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_fbdev_ttm.h>
#include <drm/drm_gem_ttm_helper.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_module.h>
vmw_fifo_resource_inc(vmw);
vmw_svga_enable(vmw);
- drm_fbdev_generic_setup(&vmw->drm, 0);
+ drm_fbdev_ttm_setup(&vmw->drm, 0);
vmw_debugfs_gem_init(vmw);
vmw_debugfs_resource_managers_init(vmw);
+++ /dev/null
-/* SPDX-License-Identifier: MIT */
-
-#ifndef DRM_FBDEV_GENERIC_H
-#define DRM_FBDEV_GENERIC_H
-
-struct drm_device;
-
-#ifdef CONFIG_DRM_FBDEV_EMULATION
-void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp);
-#else
-static inline void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp)
-{ }
-#endif
-
-#endif
--- /dev/null
+/* SPDX-License-Identifier: MIT */
+
+#ifndef DRM_FBDEV_TTM_H
+#define DRM_FBDEV_TTM_H
+
+struct drm_device;
+
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+void drm_fbdev_ttm_setup(struct drm_device *dev, unsigned int preferred_bpp);
+#else
+static inline void drm_fbdev_ttm_setup(struct drm_device *dev, unsigned int preferred_bpp)
+{ }
+#endif
+
+#endif
projects / linux-block.git / commitdiff