| // SPDX-License-Identifier: MIT |
| /* |
| * Copyright 2018 Noralf Trønnes |
| * Copyright (c) 2006-2009 Red Hat Inc. |
| * Copyright (c) 2006-2008 Intel Corporation |
| * Jesse Barnes <jesse.barnes@intel.com> |
| * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/mutex.h> |
| #include <linux/slab.h> |
| |
| #include <drm/drm_atomic.h> |
| #include <drm/drm_client.h> |
| #include <drm/drm_connector.h> |
| #include <drm/drm_crtc.h> |
| #include <drm/drm_device.h> |
| #include <drm/drm_drv.h> |
| #include <drm/drm_encoder.h> |
| #include <drm/drm_print.h> |
| |
| #include "drm_crtc_internal.h" |
| #include "drm_internal.h" |
| |
| #define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 |
| |
| struct drm_client_offset { |
| int x, y; |
| }; |
| |
| int drm_client_modeset_create(struct drm_client_dev *client) |
| { |
| struct drm_device *dev = client->dev; |
| unsigned int num_crtc = dev->mode_config.num_crtc; |
| unsigned int max_connector_count = 1; |
| struct drm_mode_set *modeset; |
| struct drm_crtc *crtc; |
| unsigned int i = 0; |
| |
| /* Add terminating zero entry to enable index less iteration */ |
| client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL); |
| if (!client->modesets) |
| return -ENOMEM; |
| |
| mutex_init(&client->modeset_mutex); |
| |
| drm_for_each_crtc(crtc, dev) |
| client->modesets[i++].crtc = crtc; |
| |
| /* Cloning is only supported in the single crtc case. */ |
| if (num_crtc == 1) |
| max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS; |
| |
| for (modeset = client->modesets; modeset->crtc; modeset++) { |
| modeset->connectors = kcalloc(max_connector_count, |
| sizeof(*modeset->connectors), GFP_KERNEL); |
| if (!modeset->connectors) |
| goto err_free; |
| } |
| |
| return 0; |
| |
| err_free: |
| drm_client_modeset_free(client); |
| |
| return -ENOMEM; |
| } |
| |
| static void drm_client_modeset_release(struct drm_client_dev *client) |
| { |
| struct drm_mode_set *modeset; |
| unsigned int i; |
| |
| drm_client_for_each_modeset(modeset, client) { |
| drm_mode_destroy(client->dev, modeset->mode); |
| modeset->mode = NULL; |
| modeset->fb = NULL; |
| |
| for (i = 0; i < modeset->num_connectors; i++) { |
| drm_connector_put(modeset->connectors[i]); |
| modeset->connectors[i] = NULL; |
| } |
| modeset->num_connectors = 0; |
| } |
| } |
| |
| void drm_client_modeset_free(struct drm_client_dev *client) |
| { |
| struct drm_mode_set *modeset; |
| |
| mutex_lock(&client->modeset_mutex); |
| |
| drm_client_modeset_release(client); |
| |
| drm_client_for_each_modeset(modeset, client) |
| kfree(modeset->connectors); |
| |
| mutex_unlock(&client->modeset_mutex); |
| |
| mutex_destroy(&client->modeset_mutex); |
| kfree(client->modesets); |
| } |
| |
| static struct drm_mode_set * |
| drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) |
| { |
| struct drm_mode_set *modeset; |
| |
| drm_client_for_each_modeset(modeset, client) |
| if (modeset->crtc == crtc) |
| return modeset; |
| |
| return NULL; |
| } |
| |
| static struct drm_display_mode * |
| drm_connector_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 (mode->hdisplay > width || |
| mode->vdisplay > height) |
| continue; |
| if (mode->type & DRM_MODE_TYPE_PREFERRED) |
| return mode; |
| } |
| return NULL; |
| } |
| |
| static struct drm_display_mode * |
| drm_connector_pick_cmdline_mode(struct drm_connector *connector) |
| { |
| struct drm_cmdline_mode *cmdline_mode; |
| struct drm_display_mode *mode; |
| bool prefer_non_interlace; |
| |
| cmdline_mode = &connector->cmdline_mode; |
| if (cmdline_mode->specified == false) |
| return NULL; |
| |
| /* 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; |
| |
| prefer_non_interlace = !cmdline_mode->interlace; |
| again: |
| list_for_each_entry(mode, &connector->modes, head) { |
| /* Check (optional) mode name first */ |
| if (!strcmp(mode->name, cmdline_mode->name)) |
| return mode; |
| |
| /* 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; |
| } else if (prefer_non_interlace) { |
| if (mode->flags & DRM_MODE_FLAG_INTERLACE) |
| continue; |
| } |
| return mode; |
| } |
| |
| if (prefer_non_interlace) { |
| prefer_non_interlace = false; |
| goto again; |
| } |
| |
| create_mode: |
| mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode); |
| if (mode) |
| list_add(&mode->head, &connector->modes); |
| |
| return mode; |
| } |
| |
| static bool drm_connector_enabled(struct drm_connector *connector, bool strict) |
| { |
| bool enable; |
| |
| if (connector->display_info.non_desktop) |
| return false; |
| |
| if (strict) |
| enable = connector->status == connector_status_connected; |
| else |
| enable = connector->status != connector_status_disconnected; |
| |
| return enable; |
| } |
| |
| static void drm_client_connectors_enabled(struct drm_connector **connectors, |
| unsigned int connector_count, |
| bool *enabled) |
| { |
| bool any_enabled = false; |
| struct drm_connector *connector; |
| int i = 0; |
| |
| for (i = 0; i < connector_count; i++) { |
| connector = connectors[i]; |
| enabled[i] = drm_connector_enabled(connector, true); |
| DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, |
| connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); |
| |
| any_enabled |= enabled[i]; |
| } |
| |
| if (any_enabled) |
| return; |
| |
| for (i = 0; i < connector_count; i++) |
| enabled[i] = drm_connector_enabled(connectors[i], false); |
| } |
| |
| static bool drm_client_target_cloned(struct drm_device *dev, |
| struct drm_connector **connectors, |
| unsigned int connector_count, |
| struct drm_display_mode **modes, |
| struct drm_client_offset *offsets, |
| bool *enabled, int width, int height) |
| { |
| int count, i, j; |
| bool can_clone = false; |
| struct drm_display_mode *dmt_mode, *mode; |
| |
| /* only contemplate cloning in the single crtc case */ |
| if (dev->mode_config.num_crtc > 1) |
| return false; |
| |
| count = 0; |
| for (i = 0; i < 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 < connector_count; i++) { |
| if (!enabled[i]) |
| continue; |
| modes[i] = drm_connector_pick_cmdline_mode(connectors[i]); |
| if (!modes[i]) { |
| can_clone = false; |
| break; |
| } |
| for (j = 0; j < i; j++) { |
| if (!enabled[j]) |
| continue; |
| if (!drm_mode_match(modes[j], modes[i], |
| DRM_MODE_MATCH_TIMINGS | |
| DRM_MODE_MATCH_CLOCK | |
| DRM_MODE_MATCH_FLAGS | |
| DRM_MODE_MATCH_3D_FLAGS)) |
| 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(dev, 1024, 768, 60, false); |
| |
| for (i = 0; i < connector_count; i++) { |
| if (!enabled[i]) |
| continue; |
| |
| list_for_each_entry(mode, &connectors[i]->modes, head) { |
| if (drm_mode_match(mode, dmt_mode, |
| DRM_MODE_MATCH_TIMINGS | |
| DRM_MODE_MATCH_CLOCK | |
| DRM_MODE_MATCH_FLAGS | |
| DRM_MODE_MATCH_3D_FLAGS)) |
| 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 int drm_client_get_tile_offsets(struct drm_connector **connectors, |
| unsigned int connector_count, |
| struct drm_display_mode **modes, |
| struct drm_client_offset *offsets, |
| int idx, |
| int h_idx, int v_idx) |
| { |
| struct drm_connector *connector; |
| int i; |
| int hoffset = 0, voffset = 0; |
| |
| for (i = 0; i < connector_count; i++) { |
| connector = connectors[i]; |
| if (!connector->has_tile) |
| continue; |
| |
| if (!modes[i] && (h_idx || v_idx)) { |
| DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, |
| connector->base.id); |
| continue; |
| } |
| if (connector->tile_h_loc < h_idx) |
| hoffset += modes[i]->hdisplay; |
| |
| if (connector->tile_v_loc < v_idx) |
| voffset += modes[i]->vdisplay; |
| } |
| offsets[idx].x = hoffset; |
| offsets[idx].y = voffset; |
| DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); |
| return 0; |
| } |
| |
| static bool drm_client_target_preferred(struct drm_connector **connectors, |
| unsigned int connector_count, |
| struct drm_display_mode **modes, |
| struct drm_client_offset *offsets, |
| bool *enabled, int width, int height) |
| { |
| const u64 mask = BIT_ULL(connector_count) - 1; |
| struct drm_connector *connector; |
| u64 conn_configured = 0; |
| int tile_pass = 0; |
| int i; |
| |
| retry: |
| for (i = 0; i < connector_count; i++) { |
| connector = connectors[i]; |
| |
| if (conn_configured & BIT_ULL(i)) |
| continue; |
| |
| if (enabled[i] == false) { |
| conn_configured |= BIT_ULL(i); |
| continue; |
| } |
| |
| /* first pass over all the untiled connectors */ |
| if (tile_pass == 0 && connector->has_tile) |
| continue; |
| |
| if (tile_pass == 1) { |
| if (connector->tile_h_loc != 0 || |
| connector->tile_v_loc != 0) |
| continue; |
| |
| } else { |
| if (connector->tile_h_loc != tile_pass - 1 && |
| connector->tile_v_loc != tile_pass - 1) |
| /* if this tile_pass doesn't cover any of the tiles - keep going */ |
| continue; |
| |
| /* |
| * find the tile offsets for this pass - need to find |
| * all tiles left and above |
| */ |
| drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i, |
| connector->tile_h_loc, connector->tile_v_loc); |
| } |
| DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", |
| connector->base.id); |
| |
| /* got for command line mode first */ |
| modes[i] = drm_connector_pick_cmdline_mode(connector); |
| if (!modes[i]) { |
| DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", |
| connector->base.id, connector->tile_group ? connector->tile_group->id : 0); |
| modes[i] = drm_connector_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"); |
| conn_configured |= BIT_ULL(i); |
| } |
| |
| if ((conn_configured & mask) != mask) { |
| tile_pass++; |
| goto retry; |
| } |
| return true; |
| } |
| |
| static bool connector_has_possible_crtc(struct drm_connector *connector, |
| struct drm_crtc *crtc) |
| { |
| struct drm_encoder *encoder; |
| int i; |
| |
| drm_connector_for_each_possible_encoder(connector, encoder, i) { |
| if (encoder->possible_crtcs & drm_crtc_mask(crtc)) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int drm_client_pick_crtcs(struct drm_client_dev *client, |
| struct drm_connector **connectors, |
| unsigned int connector_count, |
| struct drm_crtc **best_crtcs, |
| struct drm_display_mode **modes, |
| int n, int width, int height) |
| { |
| struct drm_device *dev = client->dev; |
| struct drm_connector *connector; |
| int my_score, best_score, score; |
| struct drm_crtc **crtcs, *crtc; |
| struct drm_mode_set *modeset; |
| int o; |
| |
| if (n == connector_count) |
| return 0; |
| |
| connector = connectors[n]; |
| |
| best_crtcs[n] = NULL; |
| best_score = drm_client_pick_crtcs(client, connectors, connector_count, |
| best_crtcs, modes, n + 1, width, height); |
| if (modes[n] == NULL) |
| return best_score; |
| |
| crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); |
| if (!crtcs) |
| return best_score; |
| |
| my_score = 1; |
| if (connector->status == connector_status_connected) |
| my_score++; |
| if (connector->cmdline_mode.specified) |
| my_score++; |
| if (drm_connector_has_preferred_mode(connector, width, height)) |
| my_score++; |
| |
| /* |
| * select a crtc for this connector and then attempt to configure |
| * remaining connectors |
| */ |
| drm_client_for_each_modeset(modeset, client) { |
| crtc = modeset->crtc; |
| |
| if (!connector_has_possible_crtc(connector, crtc)) |
| continue; |
| |
| for (o = 0; o < n; o++) |
| if (best_crtcs[o] == crtc) |
| break; |
| |
| if (o < n) { |
| /* ignore cloning unless only a single crtc */ |
| if (dev->mode_config.num_crtc > 1) |
| continue; |
| |
| if (!drm_mode_equal(modes[o], modes[n])) |
| continue; |
| } |
| |
| crtcs[n] = crtc; |
| memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); |
| score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, |
| crtcs, modes, n + 1, width, height); |
| if (score > best_score) { |
| best_score = score; |
| memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); |
| } |
| } |
| |
| kfree(crtcs); |
| return best_score; |
| } |
| |
| /* Try to read the BIOS display configuration and use it for the initial config */ |
| static bool drm_client_firmware_config(struct drm_client_dev *client, |
| struct drm_connector **connectors, |
| unsigned int connector_count, |
| struct drm_crtc **crtcs, |
| struct drm_display_mode **modes, |
| struct drm_client_offset *offsets, |
| bool *enabled, int width, int height) |
| { |
| unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG); |
| unsigned long conn_configured, conn_seq, mask; |
| struct drm_device *dev = client->dev; |
| int i, j; |
| bool *save_enabled; |
| bool fallback = true, ret = true; |
| int num_connectors_enabled = 0; |
| int num_connectors_detected = 0; |
| struct drm_modeset_acquire_ctx ctx; |
| |
| if (!drm_drv_uses_atomic_modeset(dev)) |
| return false; |
| |
| save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); |
| if (!save_enabled) |
| return false; |
| |
| drm_modeset_acquire_init(&ctx, 0); |
| |
| while (drm_modeset_lock_all_ctx(dev, &ctx) != 0) |
| drm_modeset_backoff(&ctx); |
| |
| memcpy(save_enabled, enabled, count); |
| mask = GENMASK(count - 1, 0); |
| conn_configured = 0; |
| retry: |
| conn_seq = conn_configured; |
| for (i = 0; i < count; i++) { |
| struct drm_connector *connector; |
| struct drm_encoder *encoder; |
| struct drm_crtc *new_crtc; |
| |
| connector = connectors[i]; |
| |
| if (conn_configured & BIT(i)) |
| continue; |
| |
| if (conn_seq == 0 && !connector->has_tile) |
| continue; |
| |
| if (connector->status == connector_status_connected) |
| num_connectors_detected++; |
| |
| if (!enabled[i]) { |
| DRM_DEBUG_KMS("connector %s not enabled, skipping\n", |
| connector->name); |
| conn_configured |= BIT(i); |
| continue; |
| } |
| |
| if (connector->force == DRM_FORCE_OFF) { |
| DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", |
| connector->name); |
| enabled[i] = false; |
| continue; |
| } |
| |
| encoder = connector->state->best_encoder; |
| if (!encoder || WARN_ON(!connector->state->crtc)) { |
| if (connector->force > DRM_FORCE_OFF) |
| goto bail; |
| |
| DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", |
| connector->name); |
| enabled[i] = false; |
| conn_configured |= BIT(i); |
| continue; |
| } |
| |
| num_connectors_enabled++; |
| |
| new_crtc = connector->state->crtc; |
| |
| /* |
| * Make sure we're not trying to drive multiple connectors |
| * with a single CRTC, since our cloning support may not |
| * match the BIOS. |
| */ |
| for (j = 0; j < count; j++) { |
| if (crtcs[j] == new_crtc) { |
| DRM_DEBUG_KMS("fallback: cloned configuration\n"); |
| goto bail; |
| } |
| } |
| |
| DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", |
| connector->name); |
| |
| /* go for command line mode first */ |
| modes[i] = drm_connector_pick_cmdline_mode(connector); |
| |
| /* try for preferred next */ |
| if (!modes[i]) { |
| DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", |
| connector->name, connector->has_tile); |
| modes[i] = drm_connector_has_preferred_mode(connector, width, height); |
| } |
| |
| /* No preferred mode marked by the EDID? Are there any modes? */ |
| if (!modes[i] && !list_empty(&connector->modes)) { |
| DRM_DEBUG_KMS("using first mode listed on connector %s\n", |
| connector->name); |
| modes[i] = list_first_entry(&connector->modes, |
| struct drm_display_mode, |
| head); |
| } |
| |
| /* last resort: use current mode */ |
| if (!modes[i]) { |
| /* |
| * IMPORTANT: We want to use the adjusted mode (i.e. |
| * after the panel fitter upscaling) as the initial |
| * config, not the input mode, which is what crtc->mode |
| * usually contains. But since our current |
| * code puts a mode derived from the post-pfit timings |
| * into crtc->mode this works out correctly. |
| * |
| * This is crtc->mode and not crtc->state->mode for the |
| * fastboot check to work correctly. |
| */ |
| DRM_DEBUG_KMS("looking for current mode on connector %s\n", |
| connector->name); |
| modes[i] = &connector->state->crtc->mode; |
| } |
| crtcs[i] = new_crtc; |
| |
| DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", |
| connector->name, |
| connector->state->crtc->base.id, |
| connector->state->crtc->name, |
| modes[i]->hdisplay, modes[i]->vdisplay, |
| modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : ""); |
| |
| fallback = false; |
| conn_configured |= BIT(i); |
| } |
| |
| if ((conn_configured & mask) != mask && conn_configured != conn_seq) |
| goto retry; |
| |
| /* |
| * If the BIOS didn't enable everything it could, fall back to have the |
| * same user experiencing of lighting up as much as possible like the |
| * fbdev helper library. |
| */ |
| if (num_connectors_enabled != num_connectors_detected && |
| num_connectors_enabled < dev->mode_config.num_crtc) { |
| DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); |
| DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, |
| num_connectors_detected); |
| fallback = true; |
| } |
| |
| if (fallback) { |
| bail: |
| DRM_DEBUG_KMS("Not using firmware configuration\n"); |
| memcpy(enabled, save_enabled, count); |
| ret = false; |
| } |
| |
| drm_modeset_drop_locks(&ctx); |
| drm_modeset_acquire_fini(&ctx); |
| |
| kfree(save_enabled); |
| return ret; |
| } |
| |
| /** |
| * drm_client_modeset_probe() - Probe for displays |
| * @client: DRM client |
| * @width: Maximum display mode width (optional) |
| * @height: Maximum display mode height (optional) |
| * |
| * This function sets up display pipelines for enabled connectors and stores the |
| * config in the client's modeset array. |
| * |
| * Returns: |
| * Zero on success or negative error code on failure. |
| */ |
| int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height) |
| { |
| struct drm_connector *connector, **connectors = NULL; |
| struct drm_connector_list_iter conn_iter; |
| struct drm_device *dev = client->dev; |
| unsigned int total_modes_count = 0; |
| struct drm_client_offset *offsets; |
| unsigned int connector_count = 0; |
| struct drm_display_mode **modes; |
| struct drm_crtc **crtcs; |
| int i, ret = 0; |
| bool *enabled; |
| |
| DRM_DEBUG_KMS("\n"); |
| |
| if (!width) |
| width = dev->mode_config.max_width; |
| if (!height) |
| height = dev->mode_config.max_height; |
| |
| drm_connector_list_iter_begin(dev, &conn_iter); |
| drm_client_for_each_connector_iter(connector, &conn_iter) { |
| struct drm_connector **tmp; |
| |
| tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); |
| if (!tmp) { |
| ret = -ENOMEM; |
| goto free_connectors; |
| } |
| |
| connectors = tmp; |
| drm_connector_get(connector); |
| connectors[connector_count++] = connector; |
| } |
| drm_connector_list_iter_end(&conn_iter); |
| |
| if (!connector_count) |
| return 0; |
| |
| crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); |
| modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); |
| offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); |
| enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); |
| if (!crtcs || !modes || !enabled || !offsets) { |
| DRM_ERROR("Memory allocation failed\n"); |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| mutex_lock(&client->modeset_mutex); |
| |
| mutex_lock(&dev->mode_config.mutex); |
| for (i = 0; i < connector_count; i++) |
| total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); |
| if (!total_modes_count) |
| DRM_DEBUG_KMS("No connectors reported connected with modes\n"); |
| drm_client_connectors_enabled(connectors, connector_count, enabled); |
| |
| if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, |
| modes, offsets, enabled, width, height)) { |
| memset(modes, 0, connector_count * sizeof(*modes)); |
| memset(crtcs, 0, connector_count * sizeof(*crtcs)); |
| memset(offsets, 0, connector_count * sizeof(*offsets)); |
| |
| if (!drm_client_target_cloned(dev, connectors, connector_count, modes, |
| offsets, enabled, width, height) && |
| !drm_client_target_preferred(connectors, connector_count, modes, |
| offsets, enabled, width, height)) |
| DRM_ERROR("Unable to find initial modes\n"); |
| |
| DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", |
| width, height); |
| |
| drm_client_pick_crtcs(client, connectors, connector_count, |
| crtcs, modes, 0, width, height); |
| } |
| mutex_unlock(&dev->mode_config.mutex); |
| |
| drm_client_modeset_release(client); |
| |
| for (i = 0; i < connector_count; i++) { |
| struct drm_display_mode *mode = modes[i]; |
| struct drm_crtc *crtc = crtcs[i]; |
| struct drm_client_offset *offset = &offsets[i]; |
| |
| if (mode && crtc) { |
| struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); |
| struct drm_connector *connector = connectors[i]; |
| |
| DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", |
| mode->name, crtc->base.id, offset->x, offset->y); |
| |
| if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || |
| (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) { |
| ret = -EINVAL; |
| break; |
| } |
| |
| modeset->mode = drm_mode_duplicate(dev, mode); |
| drm_connector_get(connector); |
| modeset->connectors[modeset->num_connectors++] = connector; |
| modeset->x = offset->x; |
| modeset->y = offset->y; |
| } |
| } |
| |
| mutex_unlock(&client->modeset_mutex); |
| out: |
| kfree(crtcs); |
| kfree(modes); |
| kfree(offsets); |
| kfree(enabled); |
| free_connectors: |
| for (i = 0; i < connector_count; i++) |
| drm_connector_put(connectors[i]); |
| kfree(connectors); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_client_modeset_probe); |
| |
| /** |
| * drm_client_rotation() - Check the initial rotation value |
| * @modeset: DRM modeset |
| * @rotation: Returned rotation value |
| * |
| * This function checks if the primary plane in @modeset can hw rotate |
| * to match the rotation needed on its connector. |
| * |
| * Note: Currently only 0 and 180 degrees are supported. |
| * |
| * Return: |
| * True if the plane can do the rotation, false otherwise. |
| */ |
| bool drm_client_rotation(struct drm_mode_set *modeset, unsigned int *rotation) |
| { |
| struct drm_connector *connector = modeset->connectors[0]; |
| struct drm_plane *plane = modeset->crtc->primary; |
| struct drm_cmdline_mode *cmdline; |
| u64 valid_mask = 0; |
| unsigned int i; |
| |
| if (!modeset->num_connectors) |
| return false; |
| |
| switch (connector->display_info.panel_orientation) { |
| case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: |
| *rotation = DRM_MODE_ROTATE_180; |
| break; |
| case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: |
| *rotation = DRM_MODE_ROTATE_90; |
| break; |
| case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: |
| *rotation = DRM_MODE_ROTATE_270; |
| break; |
| default: |
| *rotation = DRM_MODE_ROTATE_0; |
| } |
| |
| /** |
| * The panel already defined the default rotation |
| * through its orientation. Whatever has been provided |
| * on the command line needs to be added to that. |
| * |
| * Unfortunately, the rotations are at different bit |
| * indices, so the math to add them up are not as |
| * trivial as they could. |
| * |
| * Reflections on the other hand are pretty trivial to deal with, a |
| * simple XOR between the two handle the addition nicely. |
| */ |
| cmdline = &connector->cmdline_mode; |
| if (cmdline->specified && cmdline->rotation_reflection) { |
| unsigned int cmdline_rest, panel_rest; |
| unsigned int cmdline_rot, panel_rot; |
| unsigned int sum_rot, sum_rest; |
| |
| panel_rot = ilog2(*rotation & DRM_MODE_ROTATE_MASK); |
| cmdline_rot = ilog2(cmdline->rotation_reflection & DRM_MODE_ROTATE_MASK); |
| sum_rot = (panel_rot + cmdline_rot) % 4; |
| |
| panel_rest = *rotation & ~DRM_MODE_ROTATE_MASK; |
| cmdline_rest = cmdline->rotation_reflection & ~DRM_MODE_ROTATE_MASK; |
| sum_rest = panel_rest ^ cmdline_rest; |
| |
| *rotation = (1 << sum_rot) | sum_rest; |
| } |
| |
| /* |
| * TODO: support 90 / 270 degree hardware rotation, |
| * depending on the hardware this may require the framebuffer |
| * to be in a specific tiling format. |
| */ |
| if (((*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_0 && |
| (*rotation & DRM_MODE_ROTATE_MASK) != DRM_MODE_ROTATE_180) || |
| !plane->rotation_property) |
| return false; |
| |
| for (i = 0; i < plane->rotation_property->num_values; i++) |
| valid_mask |= (1ULL << plane->rotation_property->values[i]); |
| |
| if (!(*rotation & valid_mask)) |
| return false; |
| |
| return true; |
| } |
| EXPORT_SYMBOL(drm_client_rotation); |
| |
| static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active) |
| { |
| struct drm_device *dev = client->dev; |
| struct drm_plane *plane; |
| struct drm_atomic_state *state; |
| struct drm_modeset_acquire_ctx ctx; |
| struct drm_mode_set *mode_set; |
| int ret; |
| |
| drm_modeset_acquire_init(&ctx, 0); |
| |
| state = drm_atomic_state_alloc(dev); |
| if (!state) { |
| ret = -ENOMEM; |
| goto out_ctx; |
| } |
| |
| state->acquire_ctx = &ctx; |
| retry: |
| drm_for_each_plane(plane, dev) { |
| struct drm_plane_state *plane_state; |
| |
| plane_state = drm_atomic_get_plane_state(state, plane); |
| if (IS_ERR(plane_state)) { |
| ret = PTR_ERR(plane_state); |
| goto out_state; |
| } |
| |
| plane_state->rotation = DRM_MODE_ROTATE_0; |
| |
| /* disable non-primary: */ |
| if (plane->type == DRM_PLANE_TYPE_PRIMARY) |
| continue; |
| |
| ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
| if (ret != 0) |
| goto out_state; |
| } |
| |
| drm_client_for_each_modeset(mode_set, client) { |
| struct drm_plane *primary = mode_set->crtc->primary; |
| unsigned int rotation; |
| |
| if (drm_client_rotation(mode_set, &rotation)) { |
| struct drm_plane_state *plane_state; |
| |
| /* Cannot fail as we've already gotten the plane state above */ |
| plane_state = drm_atomic_get_new_plane_state(state, primary); |
| plane_state->rotation = rotation; |
| } |
| |
| ret = __drm_atomic_helper_set_config(mode_set, state); |
| if (ret != 0) |
| goto out_state; |
| |
| /* |
| * __drm_atomic_helper_set_config() sets active when a |
| * mode is set, unconditionally clear it if we force DPMS off |
| */ |
| if (!active) { |
| struct drm_crtc *crtc = mode_set->crtc; |
| struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
| |
| crtc_state->active = false; |
| } |
| } |
| |
| ret = drm_atomic_commit(state); |
| |
| out_state: |
| if (ret == -EDEADLK) |
| goto backoff; |
| |
| drm_atomic_state_put(state); |
| out_ctx: |
| drm_modeset_drop_locks(&ctx); |
| drm_modeset_acquire_fini(&ctx); |
| |
| return ret; |
| |
| backoff: |
| drm_atomic_state_clear(state); |
| drm_modeset_backoff(&ctx); |
| |
| goto retry; |
| } |
| |
| static int drm_client_modeset_commit_legacy(struct drm_client_dev *client) |
| { |
| struct drm_device *dev = client->dev; |
| struct drm_mode_set *mode_set; |
| struct drm_plane *plane; |
| int ret = 0; |
| |
| drm_modeset_lock_all(dev); |
| drm_for_each_plane(plane, dev) { |
| if (plane->type != DRM_PLANE_TYPE_PRIMARY) |
| drm_plane_force_disable(plane); |
| |
| if (plane->rotation_property) |
| drm_mode_plane_set_obj_prop(plane, |
| plane->rotation_property, |
| DRM_MODE_ROTATE_0); |
| } |
| |
| drm_client_for_each_modeset(mode_set, client) { |
| struct drm_crtc *crtc = mode_set->crtc; |
| |
| if (crtc->funcs->cursor_set2) { |
| ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); |
| if (ret) |
| goto out; |
| } else if (crtc->funcs->cursor_set) { |
| ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); |
| if (ret) |
| goto out; |
| } |
| |
| ret = drm_mode_set_config_internal(mode_set); |
| if (ret) |
| goto out; |
| } |
| out: |
| drm_modeset_unlock_all(dev); |
| |
| return ret; |
| } |
| |
| /** |
| * drm_client_modeset_commit_force() - Force commit CRTC configuration |
| * @client: DRM client |
| * |
| * Commit modeset configuration to crtcs without checking if there is a DRM master. |
| * |
| * Returns: |
| * Zero on success or negative error code on failure. |
| */ |
| int drm_client_modeset_commit_force(struct drm_client_dev *client) |
| { |
| struct drm_device *dev = client->dev; |
| int ret; |
| |
| mutex_lock(&client->modeset_mutex); |
| if (drm_drv_uses_atomic_modeset(dev)) |
| ret = drm_client_modeset_commit_atomic(client, true); |
| else |
| ret = drm_client_modeset_commit_legacy(client); |
| mutex_unlock(&client->modeset_mutex); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_client_modeset_commit_force); |
| |
| /** |
| * drm_client_modeset_commit() - Commit CRTC configuration |
| * @client: DRM client |
| * |
| * Commit modeset configuration to crtcs. |
| * |
| * Returns: |
| * Zero on success or negative error code on failure. |
| */ |
| int drm_client_modeset_commit(struct drm_client_dev *client) |
| { |
| struct drm_device *dev = client->dev; |
| int ret; |
| |
| if (!drm_master_internal_acquire(dev)) |
| return -EBUSY; |
| |
| ret = drm_client_modeset_commit_force(client); |
| |
| drm_master_internal_release(dev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_client_modeset_commit); |
| |
| static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode) |
| { |
| struct drm_device *dev = client->dev; |
| struct drm_connector *connector; |
| struct drm_mode_set *modeset; |
| int j; |
| |
| drm_modeset_lock_all(dev); |
| drm_client_for_each_modeset(modeset, client) { |
| if (!modeset->crtc->enabled) |
| continue; |
| |
| for (j = 0; j < modeset->num_connectors; j++) { |
| connector = modeset->connectors[j]; |
| connector->funcs->dpms(connector, dpms_mode); |
| drm_object_property_set_value(&connector->base, |
| dev->mode_config.dpms_property, dpms_mode); |
| } |
| } |
| drm_modeset_unlock_all(dev); |
| } |
| |
| /** |
| * drm_client_modeset_dpms() - Set DPMS mode |
| * @client: DRM client |
| * @mode: DPMS mode |
| * |
| * Note: For atomic drivers @mode is reduced to on/off. |
| * |
| * Returns: |
| * Zero on success or negative error code on failure. |
| */ |
| int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) |
| { |
| struct drm_device *dev = client->dev; |
| int ret = 0; |
| |
| if (!drm_master_internal_acquire(dev)) |
| return -EBUSY; |
| |
| mutex_lock(&client->modeset_mutex); |
| if (drm_drv_uses_atomic_modeset(dev)) |
| ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON); |
| else |
| drm_client_modeset_dpms_legacy(client, mode); |
| mutex_unlock(&client->modeset_mutex); |
| |
| drm_master_internal_release(dev); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(drm_client_modeset_dpms); |