drm/fb-helper: Move out modeset config code

No functional changes, just moving code as-is and fixing includes.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190608152657.36613-4-noralf@tronnes.org

1 files changed, 0 insertions, 692 deletions

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index e7f41e5d924c..946cae196475 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -48,10 +48,6 @@
 
 #include "drm_internal.h"
 
-struct drm_client_offset {
-	int x, y;
-};
-
 static bool drm_fbdev_emulation = true;
 module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600);
 MODULE_PARM_DESC(fbdev_emulation,
@@ -1703,694 +1699,6 @@ void drm_fb_helper_fill_info(struct fb_info *info,
 }
 EXPORT_SYMBOL(drm_fb_helper_fill_info);
 
-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 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);
-	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;
-}
-
 /*
  * This is a continuation of drm_setup_crtcs() that sets up anything related
  * to the framebuffer. During initialization, drm_setup_crtcs() is called before