/* * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. */ /* * Copyright (c) 2006-2009 Red Hat Inc. * Copyright (c) 2006-2008, 2013, Intel Corporation * Copyright (c) 2007 Dave Airlie * * DRM framebuffer helper 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: * Dave Airlie * Jesse Barnes */ #include "drmP.h" #include "drm_crtc.h" #include "drm_fb_helper.h" #include "drm_crtc_helper.h" struct list_head kernel_fb_helper_list; /** * DOC: fbdev helpers * * The fb helper functions are useful to provide an fbdev on top of a drm kernel * mode setting driver. They can be used mostly independantely from the crtc * helper functions used by many drivers to implement the kernel mode setting * interfaces. * * Initialization is done as a three-step process with drm_fb_helper_init(), * drm_fb_helper_single_add_all_connectors() and drm_fb_helper_initial_config(). * Drivers with fancier requirements than the default beheviour can override the * second step with their own code. Teardown is done with drm_fb_helper_fini(). * * At runtime drivers should restore the fbdev console by calling * drm_fb_helper_restore_fbdev_mode() from their ->lastclose callback. They * should also notify the fb helper code from updates to the output * configuration by calling drm_fb_helper_hotplug_event(). For easier * integration with the output polling code in drm_crtc_helper.c the modeset * code proves a ->output_poll_changed callback. * * All other functions exported by the fb helper library can be used to * implement the fbdev driver interface by the driver. */ /* simple single crtc case helper function * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev * emulation helper * @fb_helper: fbdev initialized with drm_fb_helper_init * * This functions adds all the available connectors for use with the given * fb_helper. This is a separate step to allow drivers to freely assign * connectors to the fbdev, e.g. if some are reserved for special purposes or * not adequate to be used for the fbcon. * * Since this is part of the initial setup before the fbdev is published, no * locking is required. */ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_connector *connector; int i; list_for_each_entry(connector, struct drm_connector, &dev->mode_config.connector_list, head) { struct drm_fb_helper_connector *fb_helper_connector; fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL); if (!fb_helper_connector) goto fail; fb_helper_connector->connector = connector; fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector; } return 0; fail: for (i = 0; i < fb_helper->connector_count; i++) { kfree(fb_helper->connector_info[i], sizeof(struct drm_fb_helper_connector)); fb_helper->connector_info[i] = NULL; } fb_helper->connector_count = 0; return -ENOMEM; } static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_fb_helper_connector *fb_helper_conn; struct gfxp_bm_fb_info fb_info; int i; gfxp_bm_getfb_info(dev->vgatext->private, &fb_info); for (i = 0; i < fb_helper->connector_count; i++) { fb_helper_conn = fb_helper->connector_info[i]; struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_helper_conn->cmdline_mode; cmdline_mode->specified = true; cmdline_mode->xres = fb_info.xres; cmdline_mode->yres = fb_info.yres; cmdline_mode->refresh_specified = true; cmdline_mode->refresh = 60; cmdline_mode->bpp_specified = true; cmdline_mode->bpp = fb_info.depth; } return 0; } static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper) { uint16_t *r_base, *g_base, *b_base; int i; if (helper->funcs->gamma_get == NULL) return; r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; for (i = 0; i < crtc->gamma_size; i++) helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i); } static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) { uint16_t *r_base, *g_base, *b_base; if (crtc->funcs->gamma_set == NULL) return; r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size); } /* Find the real fb for a given fb helper CRTC */ static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_crtc *c; list_for_each_entry(c, struct drm_crtc, &dev->mode_config.crtc_list, head) { if (crtc->base.id == c->base.id) return c->fb; } return NULL; } bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) { struct drm_device *dev; struct drm_plane *plane; bool error = false; int i; if (fb_helper == NULL) return error; dev = fb_helper->dev; list_for_each_entry(plane, struct drm_plane, &dev->mode_config.plane_list, head) drm_plane_force_disable(plane); for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; struct drm_crtc *crtc = mode_set->crtc; int ret; if (crtc->funcs->cursor_set) { ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); if (ret) error = true; } ret = drm_mode_set_config_internal(mode_set); if (ret) error = true; } return error; } bool drm_fb_helper_force_kernel_mode(void) { bool ret, error = false; struct drm_fb_helper *helper; if (list_empty(&kernel_fb_helper_list)) return false; list_for_each_entry(helper, struct drm_fb_helper, &kernel_fb_helper_list, kernel_fb_list) { if (helper->dev->switch_power_state == DRM_SWITCH_POWER_OFF) continue; ret = drm_fb_helper_restore_fbdev_mode(helper); if (ret) error = true; } return error; } static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_crtc *crtc; int bound = 0, crtcs_bound = 0; list_for_each_entry(crtc, struct drm_crtc, &dev->mode_config.crtc_list, head) { if (crtc->fb) crtcs_bound++; if (crtc->fb == fb_helper->fb) bound++; } if (bound < crtcs_bound) return false; return true; } /* maximum connectors per crtcs in the mode set */ #define INTELFB_CONN_LIMIT 4 static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) { int i; struct drm_device *dev = helper->dev; kfree(helper->connector_info, dev->mode_config.num_connector * sizeof(struct drm_fb_helper_connector *)); for (i = 0; i < helper->crtc_count; i++) { kfree(helper->crtc_info[i].mode_set.connectors, INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)); if (helper->crtc_info[i].mode_set.mode) drm_mode_destroy(helper->dev, helper->crtc_info[i].mode_set.mode); } kfree(helper->crtc_info, helper->crtc_count * sizeof(struct drm_fb_helper_crtc)); } int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *fb_helper, int crtc_count, int max_conn_count) { struct drm_crtc *crtc; int i; fb_helper->dev = dev; INIT_LIST_HEAD(&kernel_fb_helper_list); INIT_LIST_HEAD(&fb_helper->kernel_fb_list); fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); if (!fb_helper->crtc_info) return -ENOMEM; fb_helper->crtc_count = crtc_count; fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); if (!fb_helper->connector_info) { kfree(fb_helper->crtc_info, sizeof(struct drm_fb_helper_crtc)); return -ENOMEM; } fb_helper->connector_count = 0; for (i = 0; i < crtc_count; i++) { fb_helper->crtc_info[i].mode_set.connectors = kcalloc(max_conn_count, sizeof(struct drm_connector *), GFP_KERNEL); if (!fb_helper->crtc_info[i].mode_set.connectors) goto out_free; fb_helper->crtc_info[i].mode_set.num_connectors = 0; } i = 0; list_for_each_entry(crtc, struct drm_crtc, &dev->mode_config.crtc_list, head) { fb_helper->crtc_info[i].mode_set.crtc = crtc; i++; } return 0; out_free: drm_fb_helper_crtc_free(fb_helper); return -ENOMEM; } void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) { if (!list_empty(&fb_helper->kernel_fb_list)) { list_del(&fb_helper->kernel_fb_list); if (list_empty(&kernel_fb_helper_list)) { DRM_INFO("drm: unregistered panic notifier"); } } drm_fb_helper_crtc_free(fb_helper); } int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, int preferred_bpp) { int ret = 0; int crtc_count = 0; int i; struct drm_fb_helper_surface_size sizes; int gamma_size = 0; (void) memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); sizes.surface_depth = 24; sizes.surface_bpp = 32; sizes.fb_width = (unsigned)-1; sizes.fb_height = (unsigned)-1; /* if driver picks 8 or 16 by default use that for both depth/bpp */ if (preferred_bpp != sizes.surface_bpp) sizes.surface_depth = sizes.surface_bpp = preferred_bpp; /* first up get a count of crtcs now in use and new min/maxes width/heights */ for (i = 0; i < fb_helper->connector_count; i++) { struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_helper_conn->cmdline_mode; if (cmdline_mode->bpp_specified) { switch (cmdline_mode->bpp) { case 8: sizes.surface_depth = sizes.surface_bpp = 8; break; case 15: sizes.surface_depth = 15; sizes.surface_bpp = 16; break; case 16: sizes.surface_depth = sizes.surface_bpp = 16; break; case 24: sizes.surface_depth = sizes.surface_bpp = 24; break; case 32: sizes.surface_depth = 24; sizes.surface_bpp = 32; break; } break; } } crtc_count = 0; for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_display_mode *desired_mode; desired_mode = fb_helper->crtc_info[i].desired_mode; if (desired_mode) { if (gamma_size == 0) gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; if (desired_mode->hdisplay < sizes.fb_width) sizes.fb_width = desired_mode->hdisplay; if (desired_mode->vdisplay < sizes.fb_height) sizes.fb_height = desired_mode->vdisplay; if (desired_mode->hdisplay > sizes.surface_width) sizes.surface_width = desired_mode->hdisplay; if (desired_mode->vdisplay > sizes.surface_height) sizes.surface_height = desired_mode->vdisplay; crtc_count++; } } if (crtc_count == 0 || sizes.fb_width == (unsigned)-1 || sizes.fb_height == (unsigned)-1) { /* hmm everyone went away - assume VGA cable just fell out and will come back later. */ DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n"); sizes.fb_width = sizes.surface_width = 1024; sizes.fb_height = sizes.surface_height = 768; } /* push down into drivers */ ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); if (ret < 0) return ret; /* * Set the fb pointer - usually drm_setup_crtcs does this for hotplug * events, but at init time drm_setup_crtcs needs to be called before * the fb is allocated (since we need to figure out the desired size of * the fb before we can allocate it ...). Hence we need to fix things up * here again. */ for (i = 0; i < fb_helper->crtc_count; i++) if (fb_helper->crtc_info[i].mode_set.num_connectors) fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; /* Switch back to kernel console on panic */ /* multi card linked list maybe */ if (list_empty(&kernel_fb_helper_list)) { DRM_INFO("registered panic notifier"); } list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list, (caddr_t)fb_helper); return 0; } static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, uint32_t maxX, uint32_t maxY) { struct drm_connector *connector; int count = 0; int i; for (i = 0; i < fb_helper->connector_count; i++) { connector = fb_helper->connector_info[i]->connector; count += connector->funcs->fill_modes(connector, maxX, maxY); } return count; } static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) { struct drm_display_mode *mode; list_for_each_entry(mode, struct drm_display_mode, &fb_connector->connector->modes, head) { if (drm_mode_width(mode) > width || drm_mode_height(mode) > height) continue; if (mode->type & DRM_MODE_TYPE_PREFERRED) return mode; } return NULL; } static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) { struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_connector->cmdline_mode; return cmdline_mode->specified; } static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, /* LINTED E_FUNC_ARG_UNUSED */ int width, int height) { struct drm_cmdline_mode *cmdline_mode; struct drm_display_mode *mode = NULL; cmdline_mode = &fb_helper_conn->cmdline_mode; if (cmdline_mode->specified == false) return mode; /* attempt to find a matching mode in the list of modes * we have gotten so far, if not add a CVT mode that conforms */ if (cmdline_mode->rb || cmdline_mode->margins) goto create_mode; list_for_each_entry(mode, struct drm_display_mode, &fb_helper_conn->connector->modes, head) { /* check width/height */ if (mode->hdisplay != cmdline_mode->xres || mode->vdisplay != cmdline_mode->yres) continue; if (cmdline_mode->refresh_specified) { if (mode->vrefresh != cmdline_mode->refresh) continue; } if (cmdline_mode->interlace) { if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) continue; } return mode; } create_mode: mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, cmdline_mode); if (mode) list_add(&mode->head, &fb_helper_conn->connector->modes, (caddr_t)mode); return mode; } static bool drm_connector_enabled(struct drm_connector *connector, bool strict) { bool enable; if (strict) enable = connector->status == connector_status_connected; else enable = connector->status != connector_status_disconnected; return enable; } static void drm_enable_connectors(struct drm_fb_helper *fb_helper, bool *enabled) { bool any_enabled = false; struct drm_connector *connector; int i = 0; for (i = 0; i < fb_helper->connector_count; i++) { connector = fb_helper->connector_info[i]->connector; enabled[i] = drm_connector_enabled(connector, true); DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, enabled[i] ? "yes" : "no"); any_enabled |= enabled[i]; } if (any_enabled) return; for (i = 0; i < fb_helper->connector_count; i++) { connector = fb_helper->connector_info[i]->connector; enabled[i] = drm_connector_enabled(connector, false); } } static bool drm_target_cloned(struct drm_fb_helper *fb_helper, struct drm_display_mode **modes, bool *enabled, int width, int height) { int count, i, j; bool can_clone = false; struct drm_fb_helper_connector *fb_helper_conn; struct drm_display_mode *dmt_mode, *mode; /* only contemplate cloning in the single crtc case */ if (fb_helper->crtc_count > 1) return false; count = 0; for (i = 0; i < fb_helper->connector_count; i++) { if (enabled[i]) count++; } /* only contemplate cloning if more than one connector is enabled */ if (count <= 1) return false; /* check the command line or if nothing common pick 1024x768 */ can_clone = true; for (i = 0; i < fb_helper->connector_count; i++) { if (!enabled[i]) continue; fb_helper_conn = fb_helper->connector_info[i]; modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); if (!modes[i]) { can_clone = false; break; } for (j = 0; j < i; j++) { if (!enabled[j]) continue; if (!drm_mode_equal(modes[j], modes[i])) can_clone = false; } } if (can_clone) { DRM_DEBUG_KMS("can clone using command line\n"); return true; } /* try and find a 1024x768 mode on each connector */ can_clone = true; dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); for (i = 0; i < fb_helper->connector_count; i++) { if (!enabled[i]) continue; fb_helper_conn = fb_helper->connector_info[i]; list_for_each_entry(mode, struct drm_display_mode, &fb_helper_conn->connector->modes, head) { if (drm_mode_equal(mode, dmt_mode)) modes[i] = mode; } if (!modes[i]) can_clone = false; } if (can_clone) { DRM_DEBUG_KMS("can clone using 1024x768\n"); return true; } DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); return false; } static bool drm_target_preferred(struct drm_fb_helper *fb_helper, struct drm_display_mode **modes, bool *enabled, int width, int height) { struct drm_fb_helper_connector *fb_helper_conn; int i; for (i = 0; i < fb_helper->connector_count; i++) { fb_helper_conn = fb_helper->connector_info[i]; if (enabled[i] == false) continue; DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", fb_helper_conn->connector->base.id); /* got for command line mode first */ modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height); if (!modes[i]) { DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", fb_helper_conn->connector->base.id); modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); } /* No preferred modes, pick one off the list */ if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { list_for_each_entry(modes[i], struct drm_display_mode, &fb_helper_conn->connector->modes, head) /* LINTED */ { if (1) break; } } DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : "none"); } return true; } static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, struct drm_fb_helper_crtc **best_crtcs, struct drm_display_mode **modes, int n, int width, int height) { int c, o; struct drm_device *dev = fb_helper->dev; struct drm_connector *connector; struct drm_connector_helper_funcs *connector_funcs; struct drm_encoder *encoder; int my_score, best_score, score; struct drm_fb_helper_crtc **crtcs, *crtc; struct drm_fb_helper_connector *fb_helper_conn; int num_connector = dev->mode_config.num_connector; if (n == fb_helper->connector_count) return 0; ASSERT(n <= num_connector); fb_helper_conn = fb_helper->connector_info[n]; connector = fb_helper_conn->connector; best_crtcs[n] = NULL; best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); if (modes[n] == NULL) return best_score; crtcs = kzalloc(num_connector * sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); if (!crtcs) return best_score; my_score = 1; if (connector->status == connector_status_connected) my_score++; if (drm_has_cmdline_mode(fb_helper_conn)) my_score++; if (drm_has_preferred_mode(fb_helper_conn, width, height)) my_score++; connector_funcs = connector->helper_private; encoder = connector_funcs->best_encoder(connector); if (!encoder) goto out; /* select a crtc for this connector and then attempt to configure remaining connectors */ for (c = 0; c < fb_helper->crtc_count; c++) { crtc = &fb_helper->crtc_info[c]; if ((encoder->possible_crtcs & (1 << c)) == 0) continue; for (o = 0; o < n; o++) if (best_crtcs[o] == crtc) break; if (o < n) { /* ignore cloning unless only a single crtc */ if (fb_helper->crtc_count > 1) continue; if (!drm_mode_equal(modes[o], modes[n])) continue; } crtcs[n] = crtc; (void) memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, width, height); if (score > best_score) { best_score = score; (void) memcpy(best_crtcs, crtcs, num_connector * sizeof(struct drm_fb_helper_crtc *)); } } out: kfree(crtcs, (num_connector * sizeof(struct drm_fb_helper_crtc *))); return best_score; } static void drm_setup_crtcs(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_fb_helper_crtc **crtcs; struct drm_display_mode **modes; struct drm_mode_set *modeset; bool *enabled; int width, height; int i, num_connector = dev->mode_config.num_connector; DRM_DEBUG_KMS("\n"); width = dev->mode_config.max_width; height = dev->mode_config.max_height; if ((crtcs = kcalloc(num_connector, sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL)) == NULL) { DRM_ERROR("Memory allocation failed for crtcs\n"); return; } if ((modes = kcalloc(num_connector, sizeof(struct drm_display_mode *), GFP_KERNEL)) == NULL) { DRM_ERROR("Memory allocation failed for modes\n"); goto errout1; } if ((enabled = kcalloc(num_connector, sizeof(bool), GFP_KERNEL)) == NULL) { DRM_ERROR("Memory allocation failed for enabled\n"); goto errout2; } drm_enable_connectors(fb_helper, enabled); if (!(fb_helper->funcs->initial_config && fb_helper->funcs->initial_config(fb_helper, crtcs, modes, enabled, width, height))) { (void) memset(modes, 0, dev->mode_config.num_connector*sizeof(modes[0])); (void) memset(crtcs, 0, dev->mode_config.num_connector*sizeof(crtcs[0])); if (!drm_target_cloned(fb_helper, modes, enabled, width, height) && !drm_target_preferred(fb_helper, modes, enabled, width, height)) DRM_ERROR("Unable to find initial modes\n"); DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); (void) drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); } /* need to set the modesets up here for use later */ /* fill out the connector<->crtc mappings into the modesets */ for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; modeset->num_connectors = 0; modeset->fb = NULL; } for (i = 0; i < fb_helper->connector_count; i++) { struct drm_display_mode *mode = modes[i]; struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; modeset = &fb_crtc->mode_set; if (mode && fb_crtc) { DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", mode->name, fb_crtc->mode_set.crtc->base.id); fb_crtc->desired_mode = mode; if (modeset->mode) drm_mode_destroy(dev, modeset->mode); modeset->mode = drm_mode_duplicate(dev, fb_crtc->desired_mode); modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector; modeset->fb = fb_helper->fb; } } /* Clear out any old modes if there are no more connected outputs. */ for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; if (modeset->num_connectors == 0) { BUG_ON(modeset->fb); BUG_ON(modeset->num_connectors); if (modeset->mode) drm_mode_destroy(dev, modeset->mode); modeset->mode = NULL; } } kfree(enabled, num_connector * sizeof(bool)); errout2: kfree(modes, num_connector * sizeof(struct drm_display_mode *)); errout1: kfree(crtcs, num_connector * sizeof(struct drm_fb_helper_crtc *)); } /** * drm_helper_initial_config - setup a sane initial connector configuration * @dev: DRM device * * * Scan the CRTCs and connectors 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. * * Note that this also registers the fbdev and so allows userspace to call into * the driver through the fbdev interfaces. * * This function will call down into the ->fb_probe callback to let * the driver allocate and initialize the fbdev info structure and the drm * framebuffer used to back the fbdev. drm_fb_helper_fill_var() and * drm_fb_helper_fill_fix() are provided as helpers to setup simple default * values for the fbdev info structure. * * RETURNS: * Zero if everything went ok, nonzero otherwise. */ bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) { struct drm_device *dev = fb_helper->dev; int count = 0; (void) drm_fb_helper_parse_command_line(fb_helper); count = drm_fb_helper_probe_connector_modes(fb_helper, dev->mode_config.max_width, dev->mode_config.max_height); /* * we shouldn't end up with no modes here. */ if (count == 0) { DRM_INFO("No connectors reported connected with modes"); } drm_setup_crtcs(fb_helper); return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); } /** * drm_fb_helper_hotplug_event - respond to a hotplug notification by * probing all the outputs attached to the fb. * @fb_helper: the drm_fb_helper * * Scan the connectors attached to the fb_helper and try to put together a * setup after *notification of a change in output configuration. * * Called at runtime, takes the mode config locks to be able to check/change the * modeset configuration. Must be run from process context (which usually means * either the output polling work or a work item launched from the driver's * hotplug interrupt). * * Scan the connectors attached to the fb_helper and try to put together a * setup after *notification of a change in output configuration. * * RETURNS: * 0 on success and a non-zero error code otherwise. */ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; u32 max_width, max_height, bpp_sel; if (!fb_helper->fb) return 0; mutex_lock(&fb_helper->dev->mode_config.mutex); if (!drm_fb_helper_is_bound(fb_helper)) { fb_helper->delayed_hotplug = true; mutex_unlock(&fb_helper->dev->mode_config.mutex); return 0; } DRM_DEBUG_KMS("\n"); max_width = fb_helper->fb->width; max_height = fb_helper->fb->height; bpp_sel = fb_helper->fb->bits_per_pixel; (void) drm_fb_helper_probe_connector_modes(fb_helper, max_width, max_height); mutex_unlock(&fb_helper->dev->mode_config.mutex); drm_modeset_lock_all(dev); drm_setup_crtcs(fb_helper); drm_modeset_unlock_all(dev); return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); } int drm_gfxp_setmode(int mode) { bool ret = 0; if (mode == 0) { ret = drm_fb_helper_force_kernel_mode(); if (ret == true) DRM_ERROR("Failed to restore crtc configuration\n"); } if (mode == 1) DRM_DEBUG_KMS("do nothing in entervt"); return ret; } struct gfxp_blt_ops drm_gfxp_ops = { NULL, /* blt */ NULL, /* copy */ NULL, /* clear */ drm_gfxp_setmode, /* setmode */ }; void drm_register_fbops(struct drm_device *dev) { gfxp_bm_register_fbops(dev->vgatext->private, &drm_gfxp_ops); } int drm_getfb_size(struct drm_device *dev) { struct gfxp_bm_fb_info fb_info; int size, pitch; gfxp_bm_getfb_info(dev->vgatext->private, &fb_info); pitch = ALIGN(fb_info.xres * ((fb_info.depth + 7) / 8), 64); size = ALIGN(pitch *fb_info.yres, PAGE_SIZE); return size; }