diff options
Diffstat (limited to 'linux-core/drm_crtc.c')
| -rw-r--r-- | linux-core/drm_crtc.c | 1873 |
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; +} |