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authorNoralf Trønnes <noralf@tronnes.org>2019-05-31 16:01:11 +0200
committerNoralf Trønnes <noralf@tronnes.org>2019-06-04 12:13:47 +0200
commitd81294afeecdacc8d84804ba0bcb3d39e64d0f27 (patch)
treea59ff4ce05988e7c27bbb549e9114dabd574caf1 /drivers/gpu/drm/drm_client_modeset.c
parent1b94f47793b1b1c4149d8192fa7b859fffd0e7ea (diff)
downloadlinux-d81294afeecdacc8d84804ba0bcb3d39e64d0f27.tar.bz2
drm/fb-helper: Remove drm_fb_helper_crtc
struct drm_fb_helper_crtc is now just a wrapper around drm_mode_set so use that directly instead and attach it as a modeset array onto drm_client_dev. drm_fb_helper will use this array to store its modesets which means it will always initialize a drm_client, but it will not register the client (callbacks) unless it's the generic fbdev emulation. Code will later be moved to drm_client, so add code there in a new file drm_client_modeset.c with MIT license to match drm_fb_helper.c. The modeset connector array size is hardcoded for the cloned case to avoid having to pass in a value from the driver. A value of 8 is chosen to err on the safe side. This means that the max connector argument for drm_fb_helper_init() and drm_fb_helper_fbdev_setup() isn't used anymore, a todo entry for this is added. In pan_display_atomic() restore_fbdev_mode_force() is used instead of restore_fbdev_mode_atomic() because that one will later become internal to drm_client_modeset. Locking order: 1. drm_fb_helper->lock 2. drm_master_internal_acquire 3. drm_client_dev->modeset_mutex v6: Improve commit message (Sam Ravnborg) v3: - Use full drm_client_init/release for the modesets (Daniel Vetter) - drm_client_for_each_modeset: use lockdep_assert_held (Daniel Vetter) - Hook up to Documentation/gpu/drm-client.rst (Daniel Vetter) v2: - Add modesets array to drm_client (Daniel Vetter) - Use a new file for the modeset code (Daniel Vetter) - File has to be MIT licensed (Emmanuel Vadot) - Add copyrights from drm_fb_helper.c Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190531140117.37751-3-noralf@tronnes.org
Diffstat (limited to 'drivers/gpu/drm/drm_client_modeset.c')
-rw-r--r--drivers/gpu/drm/drm_client_modeset.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
new file mode 100644
index 000000000000..66770ed3299e
--- /dev/null
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -0,0 +1,104 @@
+// 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_client.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+
+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;
+}
+
+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;
+ }
+}
+/* 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)
+{
+ 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);
+}
+
+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;
+}
+/* TODO: Remove export when modeset code has been moved over */
+EXPORT_SYMBOL(drm_client_find_modeset);