| /* |
| * Copyright (c) 2006-2008 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 "drmP.h" |
| #include "drm_crtc.h" |
| #include "drm_crtc_helper.h" |
| |
| /* |
| * Detailed mode info for 800x600@60Hz |
| */ |
| static struct drm_display_mode std_modes[] = { |
| { DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840, |
| 968, 1056, 0, 600, 601, 605, 628, 0, |
| DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, |
| }; |
| |
| static void drm_mode_validate_flag(struct drm_connector *connector, |
| int flags) |
| { |
| struct drm_display_mode *mode, *t; |
| |
| if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) |
| return; |
| |
| list_for_each_entry_safe(mode, t, &connector->modes, head) { |
| if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && |
| !(flags & DRM_MODE_FLAG_INTERLACE)) |
| mode->status = MODE_NO_INTERLACE; |
| if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && |
| !(flags & DRM_MODE_FLAG_DBLSCAN)) |
| mode->status = MODE_NO_DBLESCAN; |
| } |
| |
| return; |
| } |
| |
| /** |
| * drm_helper_probe_connector_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 connectors and try to detect |
| * modes on them. Modes will first be added to the connector'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 |
| * |
| * RETURNS: |
| * Number of modes found on @connector. |
| */ |
| int drm_helper_probe_single_connector_modes(struct drm_connector *connector, |
| uint32_t maxX, uint32_t maxY) |
| { |
| struct drm_device *dev = connector->dev; |
| struct drm_display_mode *mode, *t; |
| struct drm_connector_helper_funcs *connector_funcs = |
| connector->helper_private; |
| int count = 0; |
| int mode_flags = 0; |
| |
| DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector)); |
| /* set all modes to the unverified state */ |
| list_for_each_entry_safe(mode, t, &connector->modes, head) |
| mode->status = MODE_UNVERIFIED; |
| |
| connector->status = connector->funcs->detect(connector); |
| |
| if (connector->status == connector_status_disconnected) { |
| DRM_DEBUG_KMS("%s is disconnected\n", |
| drm_get_connector_name(connector)); |
| /* TODO set EDID to NULL */ |
| return 0; |
| } |
| |
| count = (*connector_funcs->get_modes)(connector); |
| if (!count) |
| return 0; |
| |
| drm_mode_connector_list_update(connector); |
| |
| if (maxX && maxY) |
| drm_mode_validate_size(dev, &connector->modes, maxX, |
| maxY, 0); |
| |
| if (connector->interlace_allowed) |
| mode_flags |= DRM_MODE_FLAG_INTERLACE; |
| if (connector->doublescan_allowed) |
| mode_flags |= DRM_MODE_FLAG_DBLSCAN; |
| drm_mode_validate_flag(connector, mode_flags); |
| |
| list_for_each_entry_safe(mode, t, &connector->modes, head) { |
| if (mode->status == MODE_OK) |
| mode->status = connector_funcs->mode_valid(connector, |
| mode); |
| } |
| |
| |
| drm_mode_prune_invalid(dev, &connector->modes, true); |
| |
| if (list_empty(&connector->modes)) |
| return 0; |
| |
| drm_mode_sort(&connector->modes); |
| |
| DRM_DEBUG_KMS("Probed modes for %s\n", |
| drm_get_connector_name(connector)); |
| list_for_each_entry_safe(mode, t, &connector->modes, head) { |
| mode->vrefresh = drm_mode_vrefresh(mode); |
| |
| drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| drm_mode_debug_printmodeline(mode); |
| } |
| |
| return count; |
| } |
| EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); |
| |
| int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, |
| uint32_t maxY) |
| { |
| struct drm_connector *connector; |
| int count = 0; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| count += drm_helper_probe_single_connector_modes(connector, |
| maxX, maxY); |
| } |
| |
| return count; |
| } |
| EXPORT_SYMBOL(drm_helper_probe_connector_modes); |
| |
| static void drm_helper_add_std_modes(struct drm_device *dev, |
| struct drm_connector *connector) |
| { |
| struct drm_display_mode *mode, *t; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(std_modes); i++) { |
| struct drm_display_mode *stdmode; |
| |
| /* |
| * When no valid EDID modes are available we end up |
| * here and bailed in the past, now we add some standard |
| * modes and move on. |
| */ |
| stdmode = drm_mode_duplicate(dev, &std_modes[i]); |
| drm_mode_probed_add(connector, stdmode); |
| drm_mode_list_concat(&connector->probed_modes, |
| &connector->modes); |
| |
| DRM_DEBUG_KMS("Adding mode %s to %s\n", stdmode->name, |
| drm_get_connector_name(connector)); |
| } |
| drm_mode_sort(&connector->modes); |
| |
| DRM_DEBUG_KMS("Added std modes on %s\n", |
| drm_get_connector_name(connector)); |
| list_for_each_entry_safe(mode, t, &connector->modes, head) { |
| mode->vrefresh = drm_mode_vrefresh(mode); |
| |
| drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); |
| drm_mode_debug_printmodeline(mode); |
| } |
| } |
| |
| /** |
| * drm_helper_encoder_in_use - check if a given encoder is in use |
| * @encoder: encoder to check |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * Walk @encoders's DRM device's mode_config and see if it's in use. |
| * |
| * RETURNS: |
| * True if @encoder is part of the mode_config, false otherwise. |
| */ |
| bool drm_helper_encoder_in_use(struct drm_encoder *encoder) |
| { |
| struct drm_connector *connector; |
| struct drm_device *dev = encoder->dev; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder == encoder) |
| return true; |
| return false; |
| } |
| EXPORT_SYMBOL(drm_helper_encoder_in_use); |
| |
| /** |
| * drm_helper_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_helper_crtc_in_use(struct drm_crtc *crtc) |
| { |
| struct drm_encoder *encoder; |
| struct drm_device *dev = crtc->dev; |
| /* FIXME: Locking around list access? */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) |
| if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) |
| return true; |
| return false; |
| } |
| EXPORT_SYMBOL(drm_helper_crtc_in_use); |
| |
| /** |
| * drm_disable_unused_functions - disable unused objects |
| * @dev: DRM device |
| * |
| * LOCKING: |
| * Caller must hold mode config lock. |
| * |
| * If an connector 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_helper_disable_unused_functions(struct drm_device *dev) |
| { |
| struct drm_encoder *encoder; |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| struct drm_crtc *crtc; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| encoder_funcs = encoder->helper_private; |
| if (!drm_helper_encoder_in_use(encoder)) |
| (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
| } |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| crtc->enabled = drm_helper_crtc_in_use(crtc); |
| if (!crtc->enabled) { |
| crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
| crtc->fb = NULL; |
| } |
| } |
| } |
| EXPORT_SYMBOL(drm_helper_disable_unused_functions); |
| |
| static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height) |
| { |
| struct drm_display_mode *mode; |
| |
| list_for_each_entry(mode, &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_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_device *dev, bool *enabled) |
| { |
| bool any_enabled = false; |
| struct drm_connector *connector; |
| int i = 0; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| 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]; |
| i++; |
| } |
| |
| if (any_enabled) |
| return; |
| |
| i = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| enabled[i] = drm_connector_enabled(connector, false); |
| i++; |
| } |
| } |
| |
| static bool drm_target_preferred(struct drm_device *dev, |
| struct drm_display_mode **modes, |
| bool *enabled, int width, int height) |
| { |
| struct drm_connector *connector; |
| int i = 0; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| |
| if (enabled[i] == false) { |
| i++; |
| continue; |
| } |
| |
| DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", |
| connector->base.id); |
| |
| modes[i] = drm_has_preferred_mode(connector, width, height); |
| /* No preferred modes, pick one off the list */ |
| if (!modes[i] && !list_empty(&connector->modes)) { |
| list_for_each_entry(modes[i], &connector->modes, head) |
| break; |
| } |
| DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : |
| "none"); |
| i++; |
| } |
| return true; |
| } |
| |
| static int drm_pick_crtcs(struct drm_device *dev, |
| struct drm_crtc **best_crtcs, |
| struct drm_display_mode **modes, |
| int n, int width, int height) |
| { |
| int c, o; |
| struct drm_connector *connector; |
| struct drm_connector_helper_funcs *connector_funcs; |
| struct drm_encoder *encoder; |
| struct drm_crtc *best_crtc; |
| int my_score, best_score, score; |
| struct drm_crtc **crtcs, *crtc; |
| |
| if (n == dev->mode_config.num_connector) |
| return 0; |
| c = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (c == n) |
| break; |
| c++; |
| } |
| |
| best_crtcs[n] = NULL; |
| best_crtc = NULL; |
| best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height); |
| if (modes[n] == NULL) |
| return best_score; |
| |
| crtcs = kmalloc(dev->mode_config.num_connector * |
| sizeof(struct drm_crtc *), GFP_KERNEL); |
| if (!crtcs) |
| return best_score; |
| |
| my_score = 1; |
| if (connector->status == connector_status_connected) |
| my_score++; |
| if (drm_has_preferred_mode(connector, width, height)) |
| my_score++; |
| |
| connector_funcs = connector->helper_private; |
| encoder = connector_funcs->best_encoder(connector); |
| if (!encoder) |
| goto out; |
| |
| connector->encoder = encoder; |
| |
| /* select a crtc for this connector and then attempt to configure |
| remaining connectors */ |
| c = 0; |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| |
| if ((connector->encoder->possible_crtcs & (1 << c)) == 0) { |
| c++; |
| continue; |
| } |
| |
| for (o = 0; o < n; o++) |
| if (best_crtcs[o] == crtc) |
| break; |
| |
| if (o < n) { |
| /* ignore cloning for now */ |
| c++; |
| continue; |
| } |
| |
| crtcs[n] = crtc; |
| memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *)); |
| score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1, |
| width, height); |
| if (score > best_score) { |
| best_crtc = crtc; |
| best_score = score; |
| memcpy(best_crtcs, crtcs, |
| dev->mode_config.num_connector * |
| sizeof(struct drm_crtc *)); |
| } |
| c++; |
| } |
| out: |
| kfree(crtcs); |
| return best_score; |
| } |
| |
| static void drm_setup_crtcs(struct drm_device *dev) |
| { |
| struct drm_crtc **crtcs; |
| struct drm_display_mode **modes; |
| struct drm_encoder *encoder; |
| struct drm_connector *connector; |
| bool *enabled; |
| int width, height; |
| int i, ret; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| width = dev->mode_config.max_width; |
| height = dev->mode_config.max_height; |
| |
| /* clean out all the encoder/crtc combos */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| encoder->crtc = NULL; |
| } |
| |
| crtcs = kcalloc(dev->mode_config.num_connector, |
| sizeof(struct drm_crtc *), GFP_KERNEL); |
| modes = kcalloc(dev->mode_config.num_connector, |
| sizeof(struct drm_display_mode *), GFP_KERNEL); |
| enabled = kcalloc(dev->mode_config.num_connector, |
| sizeof(bool), GFP_KERNEL); |
| |
| drm_enable_connectors(dev, enabled); |
| |
| ret = drm_target_preferred(dev, modes, enabled, width, height); |
| if (!ret) |
| DRM_ERROR("Unable to find initial modes\n"); |
| |
| DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); |
| |
| drm_pick_crtcs(dev, crtcs, modes, 0, width, height); |
| |
| i = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| struct drm_display_mode *mode = modes[i]; |
| struct drm_crtc *crtc = crtcs[i]; |
| |
| if (connector->encoder == NULL) { |
| i++; |
| continue; |
| } |
| |
| if (mode && crtc) { |
| DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", |
| mode->name, crtc->base.id); |
| crtc->desired_mode = mode; |
| connector->encoder->crtc = crtc; |
| } else |
| connector->encoder->crtc = NULL; |
| i++; |
| } |
| |
| kfree(crtcs); |
| kfree(modes); |
| kfree(enabled); |
| } |
| |
| /** |
| * drm_encoder_crtc_ok - can a given crtc drive a given encoder? |
| * @encoder: encoder to test |
| * @crtc: crtc to test |
| * |
| * Return false if @encoder can't be driven by @crtc, true otherwise. |
| */ |
| static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, |
| struct drm_crtc *crtc) |
| { |
| struct drm_device *dev; |
| struct drm_crtc *tmp; |
| int crtc_mask = 1; |
| |
| WARN(!crtc, "checking null crtc?"); |
| |
| dev = crtc->dev; |
| |
| list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) { |
| if (tmp == crtc) |
| break; |
| crtc_mask <<= 1; |
| } |
| |
| if (encoder->possible_crtcs & crtc_mask) |
| return true; |
| return false; |
| } |
| |
| /* |
| * Check the CRTC we're going to map each output to vs. its current |
| * CRTC. If they don't match, we have to disable the output and the CRTC |
| * since the driver will have to re-route things. |
| */ |
| static void |
| drm_crtc_prepare_encoders(struct drm_device *dev) |
| { |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| struct drm_encoder *encoder; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| encoder_funcs = encoder->helper_private; |
| /* Disable unused encoders */ |
| if (encoder->crtc == NULL) |
| (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
| /* Disable encoders whose CRTC is about to change */ |
| if (encoder_funcs->get_crtc && |
| encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) |
| (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); |
| } |
| } |
| |
| /** |
| * 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 connectors 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_helper_set_mode(struct drm_crtc *crtc, |
| struct drm_display_mode *mode, |
| int x, int y, |
| struct drm_framebuffer *old_fb) |
| { |
| struct drm_device *dev = crtc->dev; |
| struct drm_display_mode *adjusted_mode, saved_mode; |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| struct drm_encoder_helper_funcs *encoder_funcs; |
| int saved_x, saved_y; |
| struct drm_encoder *encoder; |
| bool ret = true; |
| |
| adjusted_mode = drm_mode_duplicate(dev, mode); |
| |
| crtc->enabled = drm_helper_crtc_in_use(crtc); |
| |
| if (!crtc->enabled) |
| return true; |
| |
| 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; |
| |
| /* Pass our mode to the connectors and the CRTC to give them a chance to |
| * adjust it according to limitations or connector properties, and also |
| * a chance to reject the mode entirely. |
| */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| encoder_funcs = encoder->helper_private; |
| if (!(ret = encoder_funcs->mode_fixup(encoder, mode, |
| adjusted_mode))) { |
| goto done; |
| } |
| } |
| |
| if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { |
| goto done; |
| } |
| |
| /* Prepare the encoders and CRTCs before setting the mode. */ |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| encoder_funcs = encoder->helper_private; |
| /* Disable the encoders as the first thing we do. */ |
| encoder_funcs->prepare(encoder); |
| } |
| |
| drm_crtc_prepare_encoders(dev); |
| |
| crtc_funcs->prepare(crtc); |
| |
| /* Set up the DPLL and any encoders state that needs to adjust or depend |
| * on the DPLL. |
| */ |
| ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); |
| if (!ret) |
| goto done; |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder), |
| mode->name, mode->base.id); |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->mode_set(encoder, mode, adjusted_mode); |
| } |
| |
| /* Now enable the clocks, plane, pipe, and connectors that we set up. */ |
| crtc_funcs->commit(crtc); |
| |
| list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { |
| |
| if (encoder->crtc != crtc) |
| continue; |
| |
| encoder_funcs = encoder->helper_private; |
| encoder_funcs->commit(encoder); |
| |
| } |
| |
| /* XXX free adjustedmode */ |
| drm_mode_destroy(dev, adjusted_mode); |
| /* FIXME: add subpixel order */ |
| done: |
| if (!ret) { |
| crtc->mode = saved_mode; |
| crtc->x = saved_x; |
| crtc->y = saved_y; |
| } |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_crtc_helper_set_mode); |
| |
| |
| /** |
| * drm_crtc_helper_set_config - set a new config from userspace |
| * @crtc: CRTC to setup |
| * @crtc_info: user provided configuration |
| * @new_mode: new mode to set |
| * @connector_set: set of connectors 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_helper_set_config(struct drm_mode_set *set) |
| { |
| struct drm_device *dev; |
| struct drm_crtc **save_crtcs, *new_crtc; |
| struct drm_encoder **save_encoders, *new_encoder; |
| struct drm_framebuffer *old_fb = NULL; |
| bool save_enabled; |
| bool mode_changed = false; /* if true do a full mode set */ |
| bool fb_changed = false; /* if true and !mode_changed just do a flip */ |
| struct drm_connector *connector; |
| int count = 0, ro, fail = 0; |
| struct drm_crtc_helper_funcs *crtc_funcs; |
| int ret = 0; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| if (!set) |
| return -EINVAL; |
| |
| if (!set->crtc) |
| return -EINVAL; |
| |
| if (!set->crtc->helper_private) |
| return -EINVAL; |
| |
| crtc_funcs = set->crtc->helper_private; |
| |
| DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:" |
| " %d (x, y) (%i, %i)\n", |
| set->crtc, set->crtc->base.id, set->fb, set->connectors, |
| (int)set->num_connectors, set->x, set->y); |
| |
| dev = set->crtc->dev; |
| |
| /* save previous config */ |
| save_enabled = set->crtc->enabled; |
| |
| /* |
| * We do mode_config.num_connectors here since we'll look at the |
| * CRTC and encoder associated with each connector later. |
| */ |
| save_crtcs = kzalloc(dev->mode_config.num_connector * |
| sizeof(struct drm_crtc *), GFP_KERNEL); |
| if (!save_crtcs) |
| return -ENOMEM; |
| |
| save_encoders = kzalloc(dev->mode_config.num_connector * |
| sizeof(struct drm_encoders *), GFP_KERNEL); |
| if (!save_encoders) { |
| kfree(save_crtcs); |
| return -ENOMEM; |
| } |
| |
| /* We should be able to check here if the fb has the same properties |
| * and then just flip_or_move it */ |
| if (set->crtc->fb != set->fb) { |
| /* If we have no fb then treat it as a full mode set */ |
| if (set->crtc->fb == NULL) { |
| DRM_DEBUG_KMS("crtc has no fb, full mode set\n"); |
| mode_changed = true; |
| } else if (set->fb == NULL) { |
| mode_changed = true; |
| } else if ((set->fb->bits_per_pixel != |
| set->crtc->fb->bits_per_pixel) || |
| set->fb->depth != set->crtc->fb->depth) |
| fb_changed = true; |
| else |
| fb_changed = true; |
| } |
| |
| if (set->x != set->crtc->x || set->y != set->crtc->y) |
| fb_changed = true; |
| |
| if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { |
| DRM_DEBUG_KMS("modes are different, full mode set\n"); |
| drm_mode_debug_printmodeline(&set->crtc->mode); |
| drm_mode_debug_printmodeline(set->mode); |
| mode_changed = true; |
| } |
| |
| /* a) traverse passed in connector list and get encoders for them */ |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| struct drm_connector_helper_funcs *connector_funcs = |
| connector->helper_private; |
| save_encoders[count++] = connector->encoder; |
| new_encoder = connector->encoder; |
| for (ro = 0; ro < set->num_connectors; ro++) { |
| if (set->connectors[ro] == connector) { |
| new_encoder = connector_funcs->best_encoder(connector); |
| /* if we can't get an encoder for a connector |
| we are setting now - then fail */ |
| if (new_encoder == NULL) |
| /* don't break so fail path works correct */ |
| fail = 1; |
| break; |
| } |
| } |
| |
| if (new_encoder != connector->encoder) { |
| DRM_DEBUG_KMS("encoder changed, full mode switch\n"); |
| mode_changed = true; |
| connector->encoder = new_encoder; |
| } |
| } |
| |
| if (fail) { |
| ret = -EINVAL; |
| goto fail_no_encoder; |
| } |
| |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (!connector->encoder) |
| continue; |
| |
| save_crtcs[count++] = connector->encoder->crtc; |
| |
| if (connector->encoder->crtc == set->crtc) |
| new_crtc = NULL; |
| else |
| new_crtc = connector->encoder->crtc; |
| |
| for (ro = 0; ro < set->num_connectors; ro++) { |
| if (set->connectors[ro] == connector) |
| new_crtc = set->crtc; |
| } |
| |
| /* Make sure the new CRTC will work with the encoder */ |
| if (new_crtc && |
| !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { |
| ret = -EINVAL; |
| goto fail_set_mode; |
| } |
| if (new_crtc != connector->encoder->crtc) { |
| DRM_DEBUG_KMS("crtc changed, full mode switch\n"); |
| mode_changed = true; |
| connector->encoder->crtc = new_crtc; |
| } |
| DRM_DEBUG_KMS("setting connector %d crtc to %p\n", |
| connector->base.id, new_crtc); |
| } |
| |
| /* mode_set_base is not a required function */ |
| if (fb_changed && !crtc_funcs->mode_set_base) |
| mode_changed = true; |
| |
| if (mode_changed) { |
| old_fb = set->crtc->fb; |
| set->crtc->fb = set->fb; |
| set->crtc->enabled = (set->mode != NULL); |
| if (set->mode != NULL) { |
| DRM_DEBUG_KMS("attempting to set mode from" |
| " userspace\n"); |
| drm_mode_debug_printmodeline(set->mode); |
| if (!drm_crtc_helper_set_mode(set->crtc, set->mode, |
| set->x, set->y, |
| old_fb)) { |
| DRM_ERROR("failed to set mode on crtc %p\n", |
| set->crtc); |
| ret = -EINVAL; |
| goto fail_set_mode; |
| } |
| /* TODO are these needed? */ |
| set->crtc->desired_x = set->x; |
| set->crtc->desired_y = set->y; |
| set->crtc->desired_mode = set->mode; |
| } |
| drm_helper_disable_unused_functions(dev); |
| } else if (fb_changed) { |
| old_fb = set->crtc->fb; |
| if (set->crtc->fb != set->fb) |
| set->crtc->fb = set->fb; |
| ret = crtc_funcs->mode_set_base(set->crtc, |
| set->x, set->y, old_fb); |
| if (ret != 0) |
| goto fail_set_mode; |
| } |
| |
| kfree(save_encoders); |
| kfree(save_crtcs); |
| return 0; |
| |
| fail_set_mode: |
| set->crtc->enabled = save_enabled; |
| set->crtc->fb = old_fb; |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| if (!connector->encoder) |
| continue; |
| |
| connector->encoder->crtc = save_crtcs[count++]; |
| } |
| fail_no_encoder: |
| kfree(save_crtcs); |
| count = 0; |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) { |
| connector->encoder = save_encoders[count++]; |
| } |
| kfree(save_encoders); |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_crtc_helper_set_config); |
| |
| bool drm_helper_plugged_event(struct drm_device *dev) |
| { |
| DRM_DEBUG_KMS("\n"); |
| |
| drm_helper_probe_connector_modes(dev, dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| |
| drm_setup_crtcs(dev); |
| |
| /* alert the driver fb layer */ |
| dev->mode_config.funcs->fb_changed(dev); |
| |
| /* FIXME: send hotplug event */ |
| return true; |
| } |
| /** |
| * drm_initial_config - setup a sane initial connector configuration |
| * @dev: DRM device |
| * |
| * LOCKING: |
| * Called at init time, must take mode config lock. |
| * |
| * 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. |
| * |
| * RETURNS: |
| * Zero if everything went ok, nonzero otherwise. |
| */ |
| bool drm_helper_initial_config(struct drm_device *dev) |
| { |
| struct drm_connector *connector; |
| int count = 0; |
| |
| count = drm_helper_probe_connector_modes(dev, |
| dev->mode_config.max_width, |
| dev->mode_config.max_height); |
| |
| /* |
| * None of the available connectors had any modes, so add some |
| * and try to light them up anyway |
| */ |
| if (!count) { |
| DRM_ERROR("connectors have no modes, using standard modes\n"); |
| list_for_each_entry(connector, |
| &dev->mode_config.connector_list, |
| head) |
| drm_helper_add_std_modes(dev, connector); |
| } |
| |
| drm_setup_crtcs(dev); |
| |
| /* alert the driver fb layer */ |
| dev->mode_config.funcs->fb_changed(dev); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_initial_config); |
| |
| static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) |
| { |
| int dpms = DRM_MODE_DPMS_OFF; |
| struct drm_connector *connector; |
| struct drm_device *dev = encoder->dev; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder == encoder) |
| if (connector->dpms < dpms) |
| dpms = connector->dpms; |
| return dpms; |
| } |
| |
| static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) |
| { |
| int dpms = DRM_MODE_DPMS_OFF; |
| struct drm_connector *connector; |
| struct drm_device *dev = crtc->dev; |
| |
| list_for_each_entry(connector, &dev->mode_config.connector_list, head) |
| if (connector->encoder && connector->encoder->crtc == crtc) |
| if (connector->dpms < dpms) |
| dpms = connector->dpms; |
| return dpms; |
| } |
| |
| /** |
| * drm_helper_connector_dpms |
| * @connector affected connector |
| * @mode DPMS mode |
| * |
| * Calls the low-level connector DPMS function, then |
| * calls appropriate encoder and crtc DPMS functions as well |
| */ |
| void drm_helper_connector_dpms(struct drm_connector *connector, int mode) |
| { |
| struct drm_encoder *encoder = connector->encoder; |
| struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; |
| int old_dpms; |
| |
| if (mode == connector->dpms) |
| return; |
| |
| old_dpms = connector->dpms; |
| connector->dpms = mode; |
| |
| /* from off to on, do crtc then encoder */ |
| if (mode < old_dpms) { |
| if (crtc) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| if (crtc_funcs->dpms) |
| (*crtc_funcs->dpms) (crtc, |
| drm_helper_choose_crtc_dpms(crtc)); |
| } |
| if (encoder) { |
| struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
| if (encoder_funcs->dpms) |
| (*encoder_funcs->dpms) (encoder, |
| drm_helper_choose_encoder_dpms(encoder)); |
| } |
| } |
| |
| /* from on to off, do encoder then crtc */ |
| if (mode > old_dpms) { |
| if (encoder) { |
| struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; |
| if (encoder_funcs->dpms) |
| (*encoder_funcs->dpms) (encoder, |
| drm_helper_choose_encoder_dpms(encoder)); |
| } |
| if (crtc) { |
| struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; |
| if (crtc_funcs->dpms) |
| (*crtc_funcs->dpms) (crtc, |
| drm_helper_choose_crtc_dpms(crtc)); |
| } |
| } |
| |
| return; |
| } |
| EXPORT_SYMBOL(drm_helper_connector_dpms); |
| |
| /** |
| * drm_hotplug_stage_two |
| * @dev DRM device |
| * @connector hotpluged connector |
| * |
| * LOCKING. |
| * Caller must hold mode config lock, function might grab struct lock. |
| * |
| * Stage two of a hotplug. |
| * |
| * RETURNS: |
| * Zero on success, errno on failure. |
| */ |
| int drm_helper_hotplug_stage_two(struct drm_device *dev) |
| { |
| drm_helper_plugged_event(dev); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_hotplug_stage_two); |
| |
| int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, |
| struct drm_mode_fb_cmd *mode_cmd) |
| { |
| fb->width = mode_cmd->width; |
| fb->height = mode_cmd->height; |
| fb->pitch = mode_cmd->pitch; |
| fb->bits_per_pixel = mode_cmd->bpp; |
| fb->depth = mode_cmd->depth; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); |
| |
| int drm_helper_resume_force_mode(struct drm_device *dev) |
| { |
| struct drm_crtc *crtc; |
| int ret; |
| |
| list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { |
| |
| if (!crtc->enabled) |
| continue; |
| |
| ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, |
| crtc->x, crtc->y, crtc->fb); |
| |
| if (ret == false) |
| DRM_ERROR("failed to set mode on crtc %p\n", crtc); |
| } |
| /* disable the unused connectors while restoring the modesetting */ |
| drm_helper_disable_unused_functions(dev); |
| return 0; |
| } |
| EXPORT_SYMBOL(drm_helper_resume_force_mode); |