#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;
return -ENOMEM;
}
-void drm_client_modeset_release(struct drm_client_dev *client)
+static void drm_client_modeset_release(struct drm_client_dev *client)
{
struct drm_mode_set *modeset;
unsigned int i;
modeset->num_connectors = 0;
}
}
-/* TODO: Remove export when modeset code has been moved over */
-EXPORT_SYMBOL(drm_client_modeset_release);
void drm_client_modeset_free(struct drm_client_dev *client)
{
kfree(client->modesets);
}
-struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
+static struct drm_mode_set *
+drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
{
struct drm_mode_set *modeset;
return NULL;
}
-/* TODO: Remove export when modeset code has been moved over */
-EXPORT_SYMBOL(drm_client_find_modeset);
+
+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;
+}
+EXPORT_SYMBOL(drm_client_modeset_probe);
/**
* drm_client_panel_rotation() - Check panel orientation
#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,
}
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
projects / openwrt / staging / blogic.git / commitdiff