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d81294afee
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
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright 2018 Noralf Trønnes
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* Copyright (c) 2006-2009 Red Hat Inc.
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* Copyright (c) 2006-2008 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <drm/drm_client.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_device.h>
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int drm_client_modeset_create(struct drm_client_dev *client)
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{
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struct drm_device *dev = client->dev;
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unsigned int num_crtc = dev->mode_config.num_crtc;
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unsigned int max_connector_count = 1;
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struct drm_mode_set *modeset;
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struct drm_crtc *crtc;
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unsigned int i = 0;
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/* Add terminating zero entry to enable index less iteration */
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client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL);
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if (!client->modesets)
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return -ENOMEM;
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mutex_init(&client->modeset_mutex);
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drm_for_each_crtc(crtc, dev)
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client->modesets[i++].crtc = crtc;
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/* Cloning is only supported in the single crtc case. */
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if (num_crtc == 1)
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max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS;
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for (modeset = client->modesets; modeset->crtc; modeset++) {
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modeset->connectors = kcalloc(max_connector_count,
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sizeof(*modeset->connectors), GFP_KERNEL);
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if (!modeset->connectors)
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goto err_free;
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}
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return 0;
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err_free:
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drm_client_modeset_free(client);
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return -ENOMEM;
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}
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void drm_client_modeset_release(struct drm_client_dev *client)
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{
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struct drm_mode_set *modeset;
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unsigned int i;
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drm_client_for_each_modeset(modeset, client) {
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drm_mode_destroy(client->dev, modeset->mode);
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modeset->mode = NULL;
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modeset->fb = NULL;
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for (i = 0; i < modeset->num_connectors; i++) {
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drm_connector_put(modeset->connectors[i]);
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modeset->connectors[i] = NULL;
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}
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modeset->num_connectors = 0;
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}
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}
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/* TODO: Remove export when modeset code has been moved over */
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EXPORT_SYMBOL(drm_client_modeset_release);
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void drm_client_modeset_free(struct drm_client_dev *client)
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{
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struct drm_mode_set *modeset;
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mutex_lock(&client->modeset_mutex);
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drm_client_modeset_release(client);
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drm_client_for_each_modeset(modeset, client)
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kfree(modeset->connectors);
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mutex_unlock(&client->modeset_mutex);
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mutex_destroy(&client->modeset_mutex);
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kfree(client->modesets);
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}
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struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc)
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{
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struct drm_mode_set *modeset;
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drm_client_for_each_modeset(modeset, client)
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if (modeset->crtc == crtc)
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return modeset;
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return NULL;
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}
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/* TODO: Remove export when modeset code has been moved over */
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EXPORT_SYMBOL(drm_client_find_modeset);
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