summaryrefslogtreecommitdiff
path: root/linux-core/drm_crtc.c
diff options
context:
space:
mode:
Diffstat (limited to 'linux-core/drm_crtc.c')
-rw-r--r--linux-core/drm_crtc.c1873
1 files changed, 1873 insertions, 0 deletions
diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c
new file mode 100644
index 00000000..cad7cd83
--- /dev/null
+++ b/linux-core/drm_crtc.c
@@ -0,0 +1,1873 @@
+/*
+ * Copyright (c) 2006-2007 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ *
+ * DRM core CRTC related functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission. The copyright holders make no representations
+ * about the suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ * Keith Packard
+ * Eric Anholt <eric@anholt.net>
+ * Dave Airlie <airlied@linux.ie>
+ * Jesse Barnes <jesse.barnes@intel.com>
+ */
+#include <linux/list.h>
+#include "drm.h"
+#include "drmP.h"
+#include "drm_crtc.h"
+
+/**
+ * drm_idr_get - allocate a new identifier
+ * @dev: DRM device
+ * @ptr: object pointer, used to generate unique ID
+ *
+ * LOCKING:
+ * Caller must hold DRM mode_config lock.
+ *
+ * Create a unique identifier based on @ptr in @dev's identifier space. Used
+ * for tracking modes, CRTCs and outputs.
+ *
+ * RETURNS:
+ * New unique (relative to other objects in @dev) integer identifier for the
+ * object.
+ */
+int drm_idr_get(struct drm_device *dev, void *ptr)
+{
+ int new_id = 0;
+ int ret;
+again:
+ if (idr_pre_get(&dev->mode_config.crtc_idr, GFP_KERNEL) == 0) {
+ DRM_ERROR("Ran out memory getting a mode number\n");
+ return 0;
+ }
+
+ ret = idr_get_new_above(&dev->mode_config.crtc_idr, ptr, 1, &new_id);
+ if (ret == -EAGAIN)
+ goto again;
+
+ return new_id;
+}
+
+/**
+ * drm_idr_put - free an identifer
+ * @dev: DRM device
+ * @id: ID to free
+ *
+ * LOCKING:
+ * Caller must hold DRM mode_config lock.
+ *
+ * Free @id from @dev's unique identifier pool.
+ */
+void drm_idr_put(struct drm_device *dev, int id)
+{
+ idr_remove(&dev->mode_config.crtc_idr, id);
+}
+
+/**
+ * drm_crtc_from_fb - find the CRTC structure associated with an fb
+ * @dev: DRM device
+ * @fb: framebuffer in question
+ *
+ * LOCKING:
+ * Caller must hold mode_config lock.
+ *
+ * Find CRTC in the mode_config structure that matches @fb.
+ *
+ * RETURNS:
+ * Pointer to the CRTC or NULL if it wasn't found.
+ */
+struct drm_crtc *drm_crtc_from_fb(struct drm_device *dev,
+ struct drm_framebuffer *fb)
+{
+ struct drm_crtc *crtc;
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if (crtc->fb == fb)
+ return crtc;
+ }
+ return NULL;
+}
+
+/**
+ * drm_framebuffer_create - create a new framebuffer object
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Creates a new framebuffer objects and adds it to @dev's DRM mode_config.
+ *
+ * RETURNS:
+ * Pointer to new framebuffer or NULL on error.
+ */
+struct drm_framebuffer *drm_framebuffer_create(struct drm_device *dev)
+{
+ struct drm_framebuffer *fb;
+
+ /* Limit to single framebuffer for now */
+ if (dev->mode_config.num_fb > 1) {
+ mutex_unlock(&dev->mode_config.mutex);
+ DRM_ERROR("Attempt to add multiple framebuffers failed\n");
+ return NULL;
+ }
+
+ fb = kzalloc(sizeof(struct drm_framebuffer), GFP_KERNEL);
+ if (!fb)
+ return NULL;
+
+ fb->id = drm_idr_get(dev, fb);
+ fb->dev = dev;
+ dev->mode_config.num_fb++;
+ list_add(&fb->head, &dev->mode_config.fb_list);
+
+ return fb;
+}
+EXPORT_SYMBOL(drm_framebuffer_create);
+
+/**
+ * drm_framebuffer_destroy - remove a framebuffer object
+ * @fb: framebuffer to remove
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Scans all the CRTCs in @dev's mode_config. If they're using @fb, removes
+ * it, setting it to NULL.
+ */
+void drm_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+ struct drm_device *dev = fb->dev;
+ struct drm_crtc *crtc;
+
+ /* remove from any CRTC */
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if (crtc->fb == fb)
+ crtc->fb = NULL;
+ }
+
+ drm_idr_put(dev, fb->id);
+ list_del(&fb->head);
+ dev->mode_config.num_fb--;
+
+ kfree(fb);
+}
+EXPORT_SYMBOL(drm_framebuffer_destroy);
+
+/**
+ * drm_crtc_create - create a new CRTC object
+ * @dev: DRM device
+ * @funcs: callbacks for the new CRTC
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Creates a new CRTC object and adds it to @dev's mode_config structure.
+ *
+ * RETURNS:
+ * Pointer to new CRTC object or NULL on error.
+ */
+struct drm_crtc *drm_crtc_create(struct drm_device *dev,
+ const struct drm_crtc_funcs *funcs)
+{
+ struct drm_crtc *crtc;
+
+ crtc = kzalloc(sizeof(struct drm_crtc), GFP_KERNEL);
+ if (!crtc)
+ return NULL;
+
+ crtc->dev = dev;
+ crtc->funcs = funcs;
+
+ crtc->id = drm_idr_get(dev, crtc);
+
+ list_add_tail(&crtc->head, &dev->mode_config.crtc_list);
+ dev->mode_config.num_crtc++;
+
+ return crtc;
+}
+EXPORT_SYMBOL(drm_crtc_create);
+
+/**
+ * drm_crtc_destroy - remove a CRTC object
+ * @crtc: CRTC to remove
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Cleanup @crtc. Calls @crtc's cleanup function, then removes @crtc from
+ * its associated DRM device's mode_config. Frees it afterwards.
+ */
+void drm_crtc_destroy(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+
+ if (crtc->funcs->cleanup)
+ (*crtc->funcs->cleanup)(crtc);
+
+ drm_idr_put(dev, crtc->id);
+ list_del(&crtc->head);
+ dev->mode_config.num_crtc--;
+ kfree(crtc);
+}
+EXPORT_SYMBOL(drm_crtc_destroy);
+
+/**
+ * drm_crtc_in_use - check if a given CRTC is in a mode_config
+ * @crtc: CRTC to check
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Walk @crtc's DRM device's mode_config and see if it's in use.
+ *
+ * RETURNS:
+ * True if @crtc is part of the mode_config, false otherwise.
+ */
+bool drm_crtc_in_use(struct drm_crtc *crtc)
+{
+ struct drm_output *output;
+ struct drm_device *dev = crtc->dev;
+ /* FIXME: Locking around list access? */
+ list_for_each_entry(output, &dev->mode_config.output_list, head)
+ if (output->crtc == crtc)
+ return true;
+ return false;
+}
+EXPORT_SYMBOL(drm_crtc_in_use);
+
+/*
+ * Detailed mode info for a standard 640x480@60Hz monitor
+ */
+static struct drm_display_mode std_mode[] = {
+ { DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 25200, 640, 656,
+ 752, 800, 0, 480, 490, 492, 525, 0,
+ V_NHSYNC | V_NVSYNC) }, /* 640x480@60Hz */
+};
+
+/**
+ * drm_crtc_probe_output_modes - get complete set of display modes
+ * @dev: DRM device
+ * @maxX: max width for modes
+ * @maxY: max height for modes
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Based on @dev's mode_config layout, scan all the outputs and try to detect
+ * modes on them. Modes will first be added to the output's probed_modes
+ * list, then culled (based on validity and the @maxX, @maxY parameters) and
+ * put into the normal modes list.
+ *
+ * Intended to be used either at bootup time or when major configuration
+ * changes have occurred.
+ *
+ * FIXME: take into account monitor limits
+ */
+void drm_crtc_probe_output_modes(struct drm_device *dev, int maxX, int maxY)
+{
+ struct drm_output *output;
+ struct drm_display_mode *mode, *t;
+ int ret;
+ //if (maxX == 0 || maxY == 0)
+ // TODO
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ /* set all modes to the unverified state */
+ list_for_each_entry_safe(mode, t, &output->modes, head)
+ mode->status = MODE_UNVERIFIED;
+
+ output->status = (*output->funcs->detect)(output);
+
+ if (output->status == output_status_disconnected) {
+ DRM_DEBUG("%s is disconnected\n", output->name);
+ /* TODO set EDID to NULL */
+ continue;
+ }
+
+ ret = (*output->funcs->get_modes)(output);
+
+ if (ret) {
+ drm_mode_output_list_update(output);
+ }
+
+ if (maxX && maxY)
+ drm_mode_validate_size(dev, &output->modes, maxX,
+ maxY, 0);
+ list_for_each_entry_safe(mode, t, &output->modes, head) {
+ if (mode->status == MODE_OK)
+ mode->status = (*output->funcs->mode_valid)(output,mode);
+ }
+
+
+ drm_mode_prune_invalid(dev, &output->modes, TRUE);
+
+ if (list_empty(&output->modes)) {
+ struct drm_display_mode *stdmode;
+
+ DRM_DEBUG("No valid modes on %s\n", output->name);
+
+ /* Should we do this here ???
+ * When no valid EDID modes are available we end up
+ * here and bailed in the past, now we add a standard
+ * 640x480@60Hz mode and carry on.
+ */
+ stdmode = drm_mode_duplicate(dev, &std_mode[0]);
+ drm_mode_probed_add(output, stdmode);
+ drm_mode_list_concat(&output->probed_modes,
+ &output->modes);
+
+ DRM_DEBUG("Adding standard 640x480 @ 60Hz to %s\n",
+ output->name);
+ }
+
+ drm_mode_sort(&output->modes);
+
+ DRM_DEBUG("Probed modes for %s\n", output->name);
+ list_for_each_entry_safe(mode, t, &output->modes, head) {
+ mode->vrefresh = drm_mode_vrefresh(mode);
+
+ drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+ drm_mode_debug_printmodeline(dev, mode);
+ }
+ }
+}
+
+/**
+ * drm_crtc_set_mode - set a mode
+ * @crtc: CRTC to program
+ * @mode: mode to use
+ * @x: width of mode
+ * @y: height of mode
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Try to set @mode on @crtc. Give @crtc and its associated outputs a chance
+ * to fixup or reject the mode prior to trying to set it.
+ *
+ * RETURNS:
+ * True if the mode was set successfully, or false otherwise.
+ */
+bool drm_crtc_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode,
+ int x, int y)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_display_mode *adjusted_mode, saved_mode;
+ int saved_x, saved_y;
+ bool didLock = false;
+ bool ret = false;
+ struct drm_output *output;
+
+ adjusted_mode = drm_mode_duplicate(dev, mode);
+
+ crtc->enabled = drm_crtc_in_use(crtc);
+
+ if (!crtc->enabled) {
+ return true;
+ }
+
+ didLock = crtc->funcs->lock(crtc);
+
+ saved_mode = crtc->mode;
+ saved_x = crtc->x;
+ saved_y = crtc->y;
+
+ /* Update crtc values up front so the driver can rely on them for mode
+ * setting.
+ */
+ crtc->mode = *mode;
+ crtc->x = x;
+ crtc->y = y;
+
+ /* XXX short-circuit changes to base location only */
+
+ /* Pass our mode to the outputs and the CRTC to give them a chance to
+ * adjust it according to limitations or output properties, and also
+ * a chance to reject the mode entirely.
+ */
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ if (output->crtc != crtc)
+ continue;
+
+ if (!output->funcs->mode_fixup(output, mode, adjusted_mode)) {
+ goto done;
+ }
+ }
+
+ if (!crtc->funcs->mode_fixup(crtc, mode, adjusted_mode)) {
+ goto done;
+ }
+
+ /* Prepare the outputs and CRTCs before setting the mode. */
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ if (output->crtc != crtc)
+ continue;
+
+ /* Disable the output as the first thing we do. */
+ output->funcs->prepare(output);
+ }
+
+ crtc->funcs->prepare(crtc);
+
+ /* Set up the DPLL and any output state that needs to adjust or depend
+ * on the DPLL.
+ */
+ crtc->funcs->mode_set(crtc, mode, adjusted_mode, x, y);
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ if (output->crtc != crtc)
+ continue;
+
+ DRM_INFO("%s: set mode %s\n", output->name, mode->name);
+
+ output->funcs->mode_set(output, mode, adjusted_mode);
+ }
+
+ /* Now, enable the clocks, plane, pipe, and outputs that we set up. */
+ crtc->funcs->commit(crtc);
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ if (output->crtc != crtc)
+ continue;
+
+ output->funcs->commit(output);
+
+#if 0 // TODO def RANDR_12_INTERFACE
+ if (output->randr_output)
+ RRPostPendingProperties (output->randr_output);
+#endif
+ }
+
+ /* XXX free adjustedmode */
+ drm_mode_destroy(dev, adjusted_mode);
+ ret = TRUE;
+ /* TODO */
+// if (scrn->pScreen)
+// drm_crtc_set_screen_sub_pixel_order(dev);
+
+done:
+ if (!ret) {
+ crtc->x = saved_x;
+ crtc->y = saved_y;
+ crtc->mode = saved_mode;
+ }
+
+ if (didLock)
+ crtc->funcs->unlock (crtc);
+
+ return ret;
+}
+EXPORT_SYMBOL(drm_crtc_set_mode);
+
+/**
+ * drm_disable_unused_functions - disable unused objects
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * If an output or CRTC isn't part of @dev's mode_config, it can be disabled
+ * by calling its dpms function, which should power it off.
+ */
+void drm_disable_unused_functions(struct drm_device *dev)
+{
+ struct drm_output *output;
+ struct drm_crtc *crtc;
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+ if (!output->crtc)
+ (*output->funcs->dpms)(output, DPMSModeOff);
+ }
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ if (!crtc->enabled)
+ crtc->funcs->dpms(crtc, DPMSModeOff);
+ }
+}
+
+/**
+ * drm_mode_probed_add - add a mode to the specified output's probed mode list
+ * @output: output the new mode
+ * @mode: mode data
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Add @mode to @output's mode list for later use.
+ */
+void drm_mode_probed_add(struct drm_output *output,
+ struct drm_display_mode *mode)
+{
+ list_add(&mode->head, &output->probed_modes);
+}
+EXPORT_SYMBOL(drm_mode_probed_add);
+
+/**
+ * drm_mode_remove - remove and free a mode
+ * @output: output list to modify
+ * @mode: mode to remove
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Remove @mode from @output's mode list, then free it.
+ */
+void drm_mode_remove(struct drm_output *output, struct drm_display_mode *mode)
+{
+ list_del(&mode->head);
+ kfree(mode);
+}
+EXPORT_SYMBOL(drm_mode_remove);
+
+/**
+ * drm_output_create - create a new output
+ * @dev: DRM device
+ * @funcs: callbacks for this output
+ * @name: user visible name of the output
+ *
+ * LOCKING:
+ * Caller must hold @dev's mode_config lock.
+ *
+ * Creates a new drm_output structure and adds it to @dev's mode_config
+ * structure.
+ *
+ * RETURNS:
+ * Pointer to the new output or NULL on error.
+ */
+struct drm_output *drm_output_create(struct drm_device *dev,
+ const struct drm_output_funcs *funcs,
+ const char *name)
+{
+ struct drm_output *output = NULL;
+
+ output = kzalloc(sizeof(struct drm_output), GFP_KERNEL);
+ if (!output)
+ return NULL;
+
+ output->dev = dev;
+ output->funcs = funcs;
+ output->id = drm_idr_get(dev, output);
+ if (name)
+ strncpy(output->name, name, DRM_OUTPUT_LEN);
+ output->name[DRM_OUTPUT_LEN - 1] = 0;
+ output->subpixel_order = SubPixelUnknown;
+ INIT_LIST_HEAD(&output->probed_modes);
+ INIT_LIST_HEAD(&output->modes);
+ /* randr_output? */
+ /* output_set_monitor(output)? */
+ /* check for output_ignored(output)? */
+
+ mutex_lock(&dev->mode_config.mutex);
+ list_add_tail(&output->head, &dev->mode_config.output_list);
+ dev->mode_config.num_output++;
+
+ mutex_unlock(&dev->mode_config.mutex);
+
+ return output;
+
+}
+EXPORT_SYMBOL(drm_output_create);
+
+/**
+ * drm_output_destroy - remove an output
+ * @output: output to remove
+ *
+ * LOCKING:
+ * Caller must hold @dev's mode_config lock.
+ *
+ * Call @output's cleanup function, then remove the output from the DRM
+ * mode_config after freeing @output's modes.
+ */
+void drm_output_destroy(struct drm_output *output)
+{
+ struct drm_device *dev = output->dev;
+ struct drm_display_mode *mode, *t;
+
+ if (*output->funcs->cleanup)
+ (*output->funcs->cleanup)(output);
+
+ list_for_each_entry_safe(mode, t, &output->probed_modes, head)
+ drm_mode_remove(output, mode);
+
+ list_for_each_entry_safe(mode, t, &output->modes, head)
+ drm_mode_remove(output, mode);
+
+ mutex_lock(&dev->mode_config.mutex);
+ drm_idr_put(dev, output->id);
+ list_del(&output->head);
+ mutex_unlock(&dev->mode_config.mutex);
+ kfree(output);
+}
+EXPORT_SYMBOL(drm_output_destroy);
+
+/**
+ * drm_output_rename - rename an output
+ * @output: output to rename
+ * @name: new user visible name
+ *
+ * LOCKING:
+ * None.
+ *
+ * Simply stuff a new name into @output's name field, based on @name.
+ *
+ * RETURNS:
+ * True if the name was changed, false otherwise.
+ */
+bool drm_output_rename(struct drm_output *output, const char *name)
+{
+ if (!name)
+ return false;
+
+ strncpy(output->name, name, DRM_OUTPUT_LEN);
+ output->name[DRM_OUTPUT_LEN - 1] = 0;
+
+ DRM_DEBUG("Changed name to %s\n", output->name);
+// drm_output_set_monitor(output);
+// if (drm_output_ignored(output))
+// return FALSE;
+
+ return TRUE;
+}
+EXPORT_SYMBOL(drm_output_rename);
+
+/**
+ * drm_mode_create - create a new display mode
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * None.
+ *
+ * Create a new drm_display_mode, give it an ID, and return it.
+ *
+ * RETURNS:
+ * Pointer to new mode on success, NULL on error.
+ */
+struct drm_display_mode *drm_mode_create(struct drm_device *dev)
+{
+ struct drm_display_mode *nmode;
+
+ nmode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL);
+ if (!nmode)
+ return NULL;
+
+ nmode->mode_id = drm_idr_get(dev, nmode);
+ return nmode;
+}
+EXPORT_SYMBOL(drm_mode_create);
+
+/**
+ * drm_mode_destroy - remove a mode
+ * @dev: DRM device
+ * @mode: mode to remove
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Free @mode's unique identifier, then free it.
+ */
+void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode)
+{
+ drm_idr_put(dev, mode->mode_id);
+
+ kfree(mode);
+}
+EXPORT_SYMBOL(drm_mode_destroy);
+
+/**
+ * drm_mode_config_init - initialize DRM mode_configuration structure
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * None, should happen single threaded at init time.
+ *
+ * Initialize @dev's mode_config structure, used for tracking the graphics
+ * configuration of @dev.
+ */
+void drm_mode_config_init(struct drm_device *dev)
+{
+ mutex_init(&dev->mode_config.mutex);
+ INIT_LIST_HEAD(&dev->mode_config.fb_list);
+ INIT_LIST_HEAD(&dev->mode_config.crtc_list);
+ INIT_LIST_HEAD(&dev->mode_config.output_list);
+ INIT_LIST_HEAD(&dev->mode_config.usermode_list);
+ idr_init(&dev->mode_config.crtc_idr);
+}
+EXPORT_SYMBOL(drm_mode_config_init);
+
+/**
+ * drm_get_buffer_object - find the buffer object for a given handle
+ * @dev: DRM device
+ * @bo: pointer to caller's buffer_object pointer
+ * @handle: handle to lookup
+ *
+ * LOCKING:
+ * Must take @dev's struct_mutex to protect buffer object lookup.
+ *
+ * Given @handle, lookup the buffer object in @dev and put it in the caller's
+ * @bo pointer.
+ *
+ * RETURNS:
+ * Zero on success, -EINVAL if the handle couldn't be found.
+ */
+static int drm_get_buffer_object(struct drm_device *dev, struct drm_buffer_object **bo, unsigned long handle)
+{
+ struct drm_user_object *uo;
+ struct drm_hash_item *hash;
+ int ret;
+
+ *bo = NULL;
+
+ mutex_lock(&dev->struct_mutex);
+ ret = drm_ht_find_item(&dev->object_hash, handle, &hash);
+ if (ret) {
+ DRM_ERROR("Couldn't find handle.\n");
+ ret = -EINVAL;
+ goto out_err;
+ }
+
+ uo = drm_hash_entry(hash, struct drm_user_object, hash);
+ if (uo->type != drm_buffer_type) {
+ ret = -EINVAL;
+ goto out_err;
+ }
+
+ *bo = drm_user_object_entry(uo, struct drm_buffer_object, base);
+ ret = 0;
+out_err:
+ mutex_unlock(&dev->struct_mutex);
+ return ret;
+}
+
+/**
+ * drm_pick_crtcs - pick crtcs for output devices
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ */
+static void drm_pick_crtcs (struct drm_device *dev)
+{
+ int c, o, assigned;
+ struct drm_output *output, *output_equal;
+ struct drm_crtc *crtc;
+ struct drm_display_mode *des_mode = NULL, *modes, *modes_equal;
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+ output->crtc = NULL;
+
+ /* Don't hook up outputs that are disconnected ??
+ *
+ * This is debateable. Do we want fixed /dev/fbX or
+ * dynamic on hotplug (need mode code for that though) ?
+ *
+ * If we don't hook up outputs now, then we only create
+ * /dev/fbX for the output that's enabled, that's good as
+ * the users console will be on that output.
+ *
+ * If we do hook up outputs that are disconnected now, then
+ * the user may end up having to muck about with the fbcon
+ * map flags to assign his console to the enabled output. Ugh.
+ */
+ if (output->status != output_status_connected)
+ continue;
+
+ des_mode = NULL;
+ list_for_each_entry(des_mode, &output->modes, head) {
+ if (des_mode->type & DRM_MODE_TYPE_PREFERRED)
+ break;
+ }
+
+ /* No preferred mode, let's just select the first available */
+ if (!des_mode || !(des_mode->type & DRM_MODE_TYPE_PREFERRED)) {
+ list_for_each_entry(des_mode, &output->modes, head) {
+ if (des_mode)
+ break;
+ }
+ }
+
+ c = -1;
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ assigned = 0;
+
+ c++;
+ if ((output->possible_crtcs & (1 << c)) == 0)
+ continue;
+
+ list_for_each_entry(output_equal, &dev->mode_config.output_list, head) {
+ if (output->id == output_equal->id)
+ continue;
+
+ /* Find out if crtc has been assigned before */
+ if (output_equal->crtc == crtc)
+ assigned = 1;
+ }
+
+#if 1 /* continue for now */
+ if (assigned)
+ continue;
+#endif
+
+ o = -1;
+ list_for_each_entry(output_equal, &dev->mode_config.output_list, head) {
+ o++;
+ if (output->id == output_equal->id)
+ continue;
+
+ list_for_each_entry(modes, &output->modes, head) {
+ list_for_each_entry(modes_equal, &output_equal->modes, head) {
+ if (drm_mode_equal (modes, modes_equal)) {
+ if ((output->possible_clones & output_equal->possible_clones) && (output_equal->crtc == crtc)) {
+ printk("Cloning %s (0x%lx) to %s (0x%lx)\n",output->name,output->possible_clones,output_equal->name,output_equal->possible_clones);
+ assigned = 0;
+ goto clone;
+ }
+ }
+ }
+ }
+ }
+
+clone:
+ /* crtc has been assigned skip it */
+ if (assigned)
+ continue;
+
+ /* Found a CRTC to attach to, do it ! */
+ output->crtc = crtc;
+ output->crtc->desired_mode = des_mode;
+ output->initial_x = 0;
+ output->initial_y = 0;
+ DRM_DEBUG("Desired mode for CRTC %d is %s\n",c,des_mode->name);
+ break;
+ }
+ }
+}
+
+
+/**
+ * drm_initial_config - setup a sane initial output configuration
+ * @dev: DRM device
+ * @can_grow: this configuration is growable
+ *
+ * LOCKING:
+ * Called at init time, must take mode config lock.
+ *
+ * Scan the CRTCs and outputs and try to put together an initial setup.
+ * At the moment, this is a cloned configuration across all heads with
+ * a new framebuffer object as the backing store.
+ *
+ * RETURNS:
+ * Zero if everything went ok, nonzero otherwise.
+ */
+bool drm_initial_config(struct drm_device *dev, bool can_grow)
+{
+ struct drm_output *output;
+ struct drm_crtc *crtc;
+ int ret = false;
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ drm_crtc_probe_output_modes(dev, 2048, 2048);
+
+ drm_pick_crtcs(dev);
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+
+ /* can't setup the crtc if there's no assigned mode */
+ if (!crtc->desired_mode)
+ continue;
+
+ /* Now setup the fbdev for attached crtcs */
+ dev->driver->fb_probe(dev, crtc);
+ }
+
+ /* This is a little screwy, as we've already walked the outputs
+ * above, but it's a little bit of magic too. There's the potential
+ * for things not to get setup above if an existing device gets
+ * re-assigned thus confusing the hardware. By walking the outputs
+ * this fixes up their crtc's.
+ */
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+
+ /* can't setup the output if there's no assigned mode */
+ if (!output->crtc || !output->crtc->desired_mode)
+ continue;
+
+ /* and needs an attached fb */
+ if (output->crtc->fb)
+ drm_crtc_set_mode(output->crtc, output->crtc->desired_mode, 0, 0);
+ }
+
+ drm_disable_unused_functions(dev);
+
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+EXPORT_SYMBOL(drm_initial_config);
+
+/**
+ * drm_mode_config_cleanup - free up DRM mode_config info
+ * @dev: DRM device
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Free up all the outputs and CRTCs associated with this DRM device, then
+ * free up the framebuffers and associated buffer objects.
+ *
+ * FIXME: cleanup any dangling user buffer objects too
+ */
+void drm_mode_config_cleanup(struct drm_device *dev)
+{
+ struct drm_output *output, *ot;
+ struct drm_crtc *crtc, *ct;
+ struct drm_framebuffer *fb, *fbt;
+ struct drm_display_mode *mode, *mt;
+ list_for_each_entry_safe(output, ot, &dev->mode_config.output_list, head) {
+ drm_output_destroy(output);
+ }
+
+ list_for_each_entry_safe(mode, mt, &dev->mode_config.usermode_list, head) {
+ drm_mode_destroy(dev, mode);
+ }
+
+ list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
+ if (fb->bo->type != drm_bo_type_kernel)
+ drm_framebuffer_destroy(fb);
+ else
+ dev->driver->fb_remove(dev, drm_crtc_from_fb(dev, fb));
+ }
+
+ list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
+ drm_crtc_destroy(crtc);
+ }
+
+}
+EXPORT_SYMBOL(drm_mode_config_cleanup);
+
+/**
+ * drm_crtc_set_config - set a new config from userspace
+ * @crtc: CRTC to setup
+ * @crtc_info: user provided configuration
+ * @new_mode: new mode to set
+ * @output_set: set of outputs for the new config
+ * @fb: new framebuffer
+ *
+ * LOCKING:
+ * Caller must hold mode config lock.
+ *
+ * Setup a new configuration, provided by the user in @crtc_info, and enable
+ * it.
+ *
+ * RETURNS:
+ * Zero. (FIXME)
+ */
+int drm_crtc_set_config(struct drm_crtc *crtc, struct drm_mode_crtc *crtc_info, struct drm_display_mode *new_mode, struct drm_output **output_set, struct drm_framebuffer *fb)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_crtc **save_crtcs, *new_crtc;
+ bool save_enabled = crtc->enabled;
+ bool changed;
+ struct drm_output *output;
+ int count = 0, ro;
+
+ save_crtcs = kzalloc(dev->mode_config.num_crtc * sizeof(struct drm_crtc *), GFP_KERNEL);
+ if (!save_crtcs)
+ return -ENOMEM;
+
+ if (crtc->fb != fb)
+ changed = true;
+
+ if (crtc_info->x != crtc->x || crtc_info->y != crtc->y)
+ changed = true;
+
+ if (new_mode && (crtc->mode.mode_id != new_mode->mode_id))
+ changed = true;
+
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+ save_crtcs[count++] = output->crtc;
+
+ if (output->crtc == crtc)
+ new_crtc = NULL;
+ else
+ new_crtc = output->crtc;
+
+ for (ro = 0; ro < crtc_info->count_outputs; ro++) {
+ if (output_set[ro] == output)
+ new_crtc = crtc;
+ }
+ if (new_crtc != output->crtc) {
+ changed = true;
+ output->crtc = new_crtc;
+ }
+ }
+
+ if (changed) {
+ crtc->fb = fb;
+ crtc->enabled = (new_mode != NULL);
+ if (new_mode != NULL) {
+ DRM_DEBUG("attempting to set mode from userspace\n");
+ drm_mode_debug_printmodeline(dev, new_mode);
+ if (!drm_crtc_set_mode(crtc, new_mode, crtc_info->x,
+ crtc_info->y)) {
+ crtc->enabled = save_enabled;
+ count = 0;
+ list_for_each_entry(output, &dev->mode_config.output_list, head)
+ output->crtc = save_crtcs[count++];
+ kfree(save_crtcs);
+ return -EINVAL;
+ }
+ crtc->desired_x = crtc_info->x;
+ crtc->desired_y = crtc_info->y;
+ crtc->desired_mode = new_mode;
+ }
+ drm_disable_unused_functions(dev);
+ }
+ kfree(save_crtcs);
+ return 0;
+}
+
+/**
+ * drm_crtc_convert_to_umode - convert a drm_display_mode into a modeinfo
+ * @out: drm_mode_modeinfo struct to return to the user
+ * @in: drm_display_mode to use
+ *
+ * LOCKING:
+ * None.
+ *
+ * Convert a drm_display_mode into a drm_mode_modeinfo structure to return to
+ * the user.
+ */
+void drm_crtc_convert_to_umode(struct drm_mode_modeinfo *out, struct drm_display_mode *in)
+{
+
+ out->id = in->mode_id;
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+}
+
+/**
+ * drm_crtc_convert_to_umode - convert a modeinfo into a drm_display_mode
+ * @out: drm_display_mode to return to the user
+ * @in: drm_mode_modeinfo to use
+ *
+ * LOCKING:
+ * None.
+ *
+ * Convert a drmo_mode_modeinfo into a drm_display_mode structure to return to
+ * the caller.
+ */
+void drm_crtc_convert_umode(struct drm_display_mode *out, struct drm_mode_modeinfo *in)
+{
+ out->clock = in->clock;
+ out->hdisplay = in->hdisplay;
+ out->hsync_start = in->hsync_start;
+ out->hsync_end = in->hsync_end;
+ out->htotal = in->htotal;
+ out->hskew = in->hskew;
+ out->vdisplay = in->vdisplay;
+ out->vsync_start = in->vsync_start;
+ out->vsync_end = in->vsync_end;
+ out->vtotal = in->vtotal;
+ out->vscan = in->vscan;
+ out->vrefresh = in->vrefresh;
+ out->flags = in->flags;
+ strncpy(out->name, in->name, DRM_DISPLAY_MODE_LEN);
+ out->name[DRM_DISPLAY_MODE_LEN-1] = 0;
+}
+
+/**
+ * drm_mode_getresources - get graphics configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Takes mode config lock.
+ *
+ * Construct a set of configuration description structures and return
+ * them to the user, including CRTC, output and framebuffer configuration.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_getresources(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_card_res *card_res = data;
+ struct list_head *lh;
+ struct drm_framebuffer *fb;
+ struct drm_output *output;
+ struct drm_crtc *crtc;
+ struct drm_mode_modeinfo u_mode;
+ struct drm_display_mode *mode;
+ int ret = 0;
+ int mode_count= 0;
+ int output_count = 0;
+ int crtc_count = 0;
+ int fb_count = 0;
+ int copied = 0;
+
+ memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ list_for_each(lh, &dev->mode_config.fb_list)
+ fb_count++;
+
+ list_for_each(lh, &dev->mode_config.crtc_list)
+ crtc_count++;
+
+ list_for_each_entry(output, &dev->mode_config.output_list,
+ head) {
+ output_count++;
+ list_for_each(lh, &output->modes)
+ mode_count++;
+ }
+ list_for_each(lh, &dev->mode_config.usermode_list)
+ mode_count++;
+
+ if (card_res->count_modes == 0) {
+ DRM_DEBUG("probing modes %dx%d\n", dev->mode_config.max_width, dev->mode_config.max_height);
+ drm_crtc_probe_output_modes(dev, dev->mode_config.max_width, dev->mode_config.max_height);
+ mode_count = 0;
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+ list_for_each(lh, &output->modes)
+ mode_count++;
+ }
+ list_for_each(lh, &dev->mode_config.usermode_list)
+ mode_count++;
+ }
+
+ /* handle this in 4 parts */
+ /* FBs */
+ if (card_res->count_fbs >= fb_count) {
+ copied = 0;
+ list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
+ card_res->fb_id[copied++] = fb->id;
+ }
+ }
+ card_res->count_fbs = fb_count;
+
+ /* CRTCs */
+ if (card_res->count_crtcs >= crtc_count) {
+ copied = 0;
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head){
+ DRM_DEBUG("CRTC ID is %d\n", crtc->id);
+ card_res->crtc_id[copied++] = crtc->id;
+ }
+ }
+ card_res->count_crtcs = crtc_count;
+
+
+ /* Outputs */
+ if (card_res->count_outputs >= output_count) {
+ copied = 0;
+ list_for_each_entry(output, &dev->mode_config.output_list,
+ head) {
+ DRM_DEBUG("OUTPUT ID is %d\n", output->id);
+ card_res->output_id[copied++] = output->id;
+ }
+ }
+ card_res->count_outputs = output_count;
+
+ /* Modes */
+ if (card_res->count_modes >= mode_count) {
+ copied = 0;
+ list_for_each_entry(output, &dev->mode_config.output_list,
+ head) {
+ list_for_each_entry(mode, &output->modes, head) {
+ drm_crtc_convert_to_umode(&u_mode, mode);
+ card_res->modes[copied++] = u_mode;
+ }
+ }
+ /* add in user modes */
+ list_for_each_entry(mode, &dev->mode_config.usermode_list, head) {
+ drm_crtc_convert_to_umode(&u_mode, mode);
+ card_res->modes[copied++] = u_mode;
+ }
+ }
+ card_res->count_modes = mode_count;
+
+ DRM_DEBUG("Counted %d %d %d\n", card_res->count_crtcs,
+ card_res->count_outputs,
+ card_res->count_modes);
+
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_getcrtc - get CRTC configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Caller? (FIXME)
+ *
+ * Construct a CRTC configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_getcrtc(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc *crtc_resp = data;
+ struct drm_crtc *crtc;
+ struct drm_output *output;
+ int ocount;
+ int ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+ crtc = idr_find(&dev->mode_config.crtc_idr, crtc_resp->crtc_id);
+ if (!crtc || (crtc->id != crtc_resp->crtc_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ crtc_resp->x = crtc->x;
+ crtc_resp->y = crtc->y;
+ crtc_resp->fb_id = 1;
+
+ crtc_resp->outputs = 0;
+ if (crtc->enabled) {
+
+ crtc_resp->mode = crtc->mode.mode_id;
+ ocount = 0;
+ list_for_each_entry(output, &dev->mode_config.output_list, head) {
+ if (output->crtc == crtc)
+ crtc_resp->outputs |= 1 << (ocount++);
+ }
+ } else {
+ crtc_resp->mode = 0;
+ }
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_getoutput - get output configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Caller? (FIXME)
+ *
+ * Construct a output configuration structure to return to the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_getoutput(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_get_output *out_resp = data;
+ struct drm_output *output;
+ struct drm_display_mode *mode;
+ int mode_count = 0;
+ int ret = 0;
+ int copied = 0;
+ int i;
+
+ DRM_DEBUG("output id %d:\n", out_resp->output);
+
+ mutex_lock(&dev->mode_config.mutex);
+ output= idr_find(&dev->mode_config.crtc_idr, out_resp->output);
+ if (!output || (output->id != out_resp->output)) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ list_for_each_entry(mode, &output->modes, head)
+ mode_count++;
+
+ for (i = 0; i < DRM_OUTPUT_MAX_UMODES; i++)
+ if (output->user_mode_ids[i] != 0)
+ mode_count++;
+
+ strncpy(out_resp->name, output->name, DRM_OUTPUT_NAME_LEN);
+ out_resp->name[DRM_OUTPUT_NAME_LEN-1] = 0;
+
+ out_resp->mm_width = output->mm_width;
+ out_resp->mm_height = output->mm_height;
+ out_resp->subpixel = output->subpixel_order;
+ out_resp->connection = output->status;
+ if (output->crtc)
+ out_resp->crtc = output->crtc->id;
+ else
+ out_resp->crtc = 0;
+
+ if ((out_resp->count_modes >= mode_count) && mode_count) {
+ copied = 0;
+ list_for_each_entry(mode, &output->modes, head) {
+ out_resp->modes[copied++] = mode->mode_id;
+ }
+ for (i = 0; i < DRM_OUTPUT_MAX_UMODES; i++) {
+ if (output->user_mode_ids[i] != 0)
+ out_resp->modes[copied++] = output->user_mode_ids[i];
+ }
+
+ }
+ out_resp->count_modes = mode_count;
+
+done:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_setcrtc - set CRTC configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Caller? (FIXME)
+ *
+ * Build a new CRTC configuration based on user request.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_setcrtc(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_crtc *crtc_req = data;
+ struct drm_crtc *crtc;
+ struct drm_output **output_set = NULL, *output;
+ struct drm_display_mode *mode;
+ struct drm_framebuffer *fb = NULL;
+ int ret = 0;
+ int i;
+
+ mutex_lock(&dev->mode_config.mutex);
+ crtc = idr_find(&dev->mode_config.crtc_idr, crtc_req->crtc_id);
+ if (!crtc || (crtc->id != crtc_req->crtc_id)) {
+ DRM_DEBUG("Unknown CRTC ID %d\n", crtc_req->crtc_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (crtc_req->mode) {
+ /* if we have a mode we need a framebuffer */
+ if (crtc_req->fb_id) {
+ fb = idr_find(&dev->mode_config.crtc_idr, crtc_req->fb_id);
+ if (!fb || (fb->id != crtc_req->fb_id)) {
+ DRM_DEBUG("Unknown FB ID%d\n", crtc_req->fb_id);
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+ mode = idr_find(&dev->mode_config.crtc_idr, crtc_req->mode);
+ if (!mode || (mode->mode_id != crtc_req->mode)) {
+ struct drm_output *output;
+
+ list_for_each_entry(output,
+ &dev->mode_config.output_list,
+ head) {
+ list_for_each_entry(mode, &output->modes,
+ head) {
+ drm_mode_debug_printmodeline(dev,
+ mode);
+ }
+ }
+
+ DRM_DEBUG("Unknown mode id %d, %p\n", crtc_req->mode, mode);
+ ret = -EINVAL;
+ goto out;
+ }
+ } else
+ mode = NULL;
+
+ if (crtc_req->count_outputs == 0 && mode) {
+ DRM_DEBUG("Count outputs is 0 but mode set\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (crtc_req->count_outputs > 0 && !mode && !fb) {
+ DRM_DEBUG("Count outputs is %d but no mode or fb set\n", crtc_req->count_outputs);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (crtc_req->count_outputs > 0) {
+ u32 out_id;
+ output_set = kmalloc(crtc_req->count_outputs *
+ sizeof(struct drm_output *), GFP_KERNEL);
+ if (!output_set) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < crtc_req->count_outputs; i++) {
+ if (get_user(out_id, &crtc_req->set_outputs[i])) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ output = idr_find(&dev->mode_config.crtc_idr, out_id);
+ if (!output || (out_id != output->id)) {
+ DRM_DEBUG("Output id %d unknown\n", out_id);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ output_set[i] = output;
+ }
+ }
+
+ ret = drm_crtc_set_config(crtc, crtc_req, mode, output_set, fb);
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_addfb - add an FB to the graphics configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Takes mode config lock.
+ *
+ * Add a new FB to the specified CRTC, given a user request.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_addfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_fb_cmd *r = data;
+ struct drm_mode_config *config = &dev->mode_config;
+ struct drm_framebuffer *fb;
+ struct drm_buffer_object *bo;
+ struct drm_crtc *crtc;
+ int ret = 0;
+
+ if ((config->min_width > r->width) || (r->width > config->max_width)) {
+ DRM_ERROR("mode new framebuffer width not within limits\n");
+ return -EINVAL;
+ }
+ if ((config->min_height > r->height) || (r->height > config->max_height)) {
+ DRM_ERROR("mode new framebuffer height not within limits\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&dev->mode_config.mutex);
+ /* TODO check limits are okay */
+ ret = drm_get_buffer_object(dev, &bo, r->handle);
+ if (ret || !bo) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* TODO check buffer is sufficently large */
+ /* TODO setup destructor callback */
+
+ fb = drm_framebuffer_create(dev);
+ if (!fb) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ fb->width = r->width;
+ fb->height = r->height;
+ fb->pitch = r->pitch;
+ fb->bits_per_pixel = r->bpp;
+ fb->depth = r->depth;
+ fb->offset = bo->offset;
+ fb->bo = bo;
+
+ r->buffer_id = fb->id;
+
+ list_add(&fb->filp_head, &file_priv->fbs);
+
+ /* FIXME: bind the fb to the right crtc */
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ crtc->fb = fb;
+ dev->driver->fb_probe(dev, crtc);
+ }
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_rmfb - remove an FB from the configuration
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Takes mode config lock.
+ *
+ * Remove the FB specified by the user.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_rmfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_framebuffer *fb = 0;
+ uint32_t *id = data;
+ int ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+ fb = idr_find(&dev->mode_config.crtc_idr, *id);
+ /* TODO check that we realy get a framebuffer back. */
+ if (!fb || (*id != fb->id)) {
+ DRM_ERROR("mode invalid framebuffer id\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /* TODO check if we own the buffer */
+ /* TODO release all crtc connected to the framebuffer */
+ /* bind the fb to the crtc for now */
+ /* TODO unhock the destructor from the buffer object */
+
+ if (fb->bo->type != drm_bo_type_kernel)
+ drm_framebuffer_destroy(fb);
+ else
+ dev->driver->fb_remove(dev, drm_crtc_from_fb(dev, fb));
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_mode_getfb - get FB info
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * LOCKING:
+ * Caller? (FIXME)
+ *
+ * Lookup the FB given its ID and return info about it.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_getfb(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_fb_cmd *r = data;
+ struct drm_framebuffer *fb;
+ int ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+ fb = idr_find(&dev->mode_config.crtc_idr, r->buffer_id);
+ if (!fb || (r->buffer_id != fb->id)) {
+ DRM_ERROR("invalid framebuffer id\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ r->height = fb->height;
+ r->width = fb->width;
+ r->depth = fb->depth;
+ r->bpp = fb->bits_per_pixel;
+ r->handle = fb->bo->base.hash.key;
+ r->pitch = fb->pitch;
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_fb_release - remove and free the FBs on this file
+ * @filp: file * from the ioctl
+ *
+ * LOCKING:
+ * Takes mode config lock.
+ *
+ * Destroy all the FBs associated with @filp.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+void drm_fb_release(struct file *filp)
+{
+ struct drm_file *priv = filp->private_data;
+ struct drm_device *dev = priv->head->dev;
+ struct drm_framebuffer *fb, *tfb;
+
+ mutex_lock(&dev->mode_config.mutex);
+ list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
+ list_del(&fb->filp_head);
+ if (fb->bo->type != drm_bo_type_kernel)
+ drm_framebuffer_destroy(fb);
+ else
+ dev->driver->fb_remove(dev, drm_crtc_from_fb(dev, fb));
+ }
+ mutex_unlock(&dev->mode_config.mutex);
+}
+
+/**
+ * drm_fb_newmode - adds a user defined mode
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * Adds a user specified mode to the kernel.
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * writes new mode id into arg.
+ * Zero on success, errno on failure.
+ */
+int drm_mode_addmode(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_modeinfo *new_mode = data;
+ struct drm_display_mode *user_mode;
+ int ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+ user_mode = drm_mode_create(dev);
+ if (!user_mode) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ drm_crtc_convert_umode(user_mode, new_mode);
+ user_mode->type |= DRM_MODE_TYPE_USERDEF;
+
+ user_mode->output_count = 0;
+
+ list_add(&user_mode->head, &dev->mode_config.usermode_list);
+
+ new_mode->id = user_mode->mode_id;
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_fb_rmmode - removes a user defined mode
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * Remove the user defined mode specified by the user.
+ *
+ * Called by the user via ioctl
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_rmmode(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ uint32_t *id = data;
+ struct drm_display_mode *mode, *t;
+ int ret = -EINVAL;
+
+ mutex_lock(&dev->mode_config.mutex);
+ mode = idr_find(&dev->mode_config.crtc_idr, *id);
+ if (!mode || (*id != mode->mode_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (!(mode->type & DRM_MODE_TYPE_USERDEF)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (mode->output_count) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ list_for_each_entry(t, &dev->mode_config.usermode_list, head) {
+ if (t == mode) {
+ list_del(&mode->head);
+ drm_mode_destroy(dev, mode);
+ ret = 0;
+ break;
+ }
+ }
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+/**
+ * drm_fb_attachmode - Attach a user mode to an output
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * This attaches a user specified mode to an output.
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_attachmode(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_mode_cmd *mode_cmd = data;
+ struct drm_output *output;
+ struct drm_display_mode *mode;
+ int i, ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ mode = idr_find(&dev->mode_config.crtc_idr, mode_cmd->mode_id);
+ if (!mode || (mode->mode_id != mode_cmd->mode_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ output = idr_find(&dev->mode_config.crtc_idr, mode_cmd->output_id);
+ if (!output || (output->id != mode_cmd->output_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ for (i = 0; i < DRM_OUTPUT_MAX_UMODES; i++) {
+ if (output->user_mode_ids[i] == 0) {
+ output->user_mode_ids[i] = mode->mode_id;
+ mode->output_count++;
+ break;
+ }
+ }
+
+ if (i == DRM_OUTPUT_MAX_UMODES)
+ ret = -ENOSPC;
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}
+
+
+/**
+ * drm_fb_detachmode - Detach a user specified mode from an output
+ * @inode: inode from the ioctl
+ * @filp: file * from the ioctl
+ * @cmd: cmd from ioctl
+ * @arg: arg from ioctl
+ *
+ * Called by the user via ioctl.
+ *
+ * RETURNS:
+ * Zero on success, errno on failure.
+ */
+int drm_mode_detachmode(struct drm_device *dev,
+ void *data, struct drm_file *file_priv)
+{
+ struct drm_mode_mode_cmd *mode_cmd = data;
+ struct drm_output *output;
+ struct drm_display_mode *mode;
+ int i, found = 0, ret = 0;
+
+ mutex_lock(&dev->mode_config.mutex);
+
+ mode = idr_find(&dev->mode_config.crtc_idr, mode_cmd->mode_id);
+ if (!mode || (mode->mode_id != mode_cmd->mode_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ output = idr_find(&dev->mode_config.crtc_idr, mode_cmd->output_id);
+ if (!output || (output->id != mode_cmd->output_id)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+
+ for (i = 0; i < DRM_OUTPUT_MAX_UMODES; i++) {
+ if (output->user_mode_ids[i] == mode->mode_id) {
+ output->user_mode_ids[i] = 0;
+ mode->output_count--;
+ found = 1;
+ }
+ }
+
+ if (!found)
+ ret = -EINVAL;
+
+out:
+ mutex_unlock(&dev->mode_config.mutex);
+ return ret;
+}