forked from Minki/linux
e6fc3b6855
This is the plumbing for supporting fb modifiers on planes. Modifiers have already been introduced to some extent, but this series will extend this to allow querying modifiers per plane. Based on this, the client to enable optimal modifications for framebuffers. This patch simply allows the DRM drivers to initialize their list of supported modifiers upon initializing the plane. v2: A minor addition from Daniel v3: * Updated commit message * s/INVALID/DRM_FORMAT_MOD_INVALID (Liviu) * Remove some excess newlines (Liviu) * Update comment for > 64 modifiers (Liviu) v4: Minor comment adjustments (Liviu) v5: Some new platforms added due to rebase v6: Add some missed plane inits (or maybe they're new - who knows at this point) (Daniel) Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Reviewed-by: Daniel Stone <daniels@collabora.com> (v2) Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Daniel Stone <daniels@collabora.com>
159 lines
5.2 KiB
C
159 lines
5.2 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <drm/drm_modeset_helper.h>
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#include <drm/drm_plane_helper.h>
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/**
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* DOC: aux kms helpers
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*
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* This helper library contains various one-off functions which don't really fit
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* anywhere else in the DRM modeset helper library.
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*/
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/**
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* drm_helper_move_panel_connectors_to_head() - move panels to the front in the
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* connector list
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* @dev: drm device to operate on
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*
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* Some userspace presumes that the first connected connector is the main
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* display, where it's supposed to display e.g. the login screen. For
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* laptops, this should be the main panel. Use this function to sort all
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* (eDP/LVDS/DSI) panels to the front of the connector list, instead of
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* painstakingly trying to initialize them in the right order.
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*/
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void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
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{
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struct drm_connector *connector, *tmp;
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struct list_head panel_list;
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INIT_LIST_HEAD(&panel_list);
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spin_lock_irq(&dev->mode_config.connector_list_lock);
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list_for_each_entry_safe(connector, tmp,
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&dev->mode_config.connector_list, head) {
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if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
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connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
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connector->connector_type == DRM_MODE_CONNECTOR_DSI)
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list_move_tail(&connector->head, &panel_list);
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}
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list_splice(&panel_list, &dev->mode_config.connector_list);
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spin_unlock_irq(&dev->mode_config.connector_list_lock);
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}
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EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
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/**
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* drm_helper_mode_fill_fb_struct - fill out framebuffer metadata
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* @dev: DRM device
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* @fb: drm_framebuffer object to fill out
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* @mode_cmd: metadata from the userspace fb creation request
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*
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* This helper can be used in a drivers fb_create callback to pre-fill the fb's
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* metadata fields.
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*/
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void drm_helper_mode_fill_fb_struct(struct drm_device *dev,
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struct drm_framebuffer *fb,
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const struct drm_mode_fb_cmd2 *mode_cmd)
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{
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int i;
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fb->dev = dev;
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fb->format = drm_get_format_info(dev, mode_cmd);
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fb->width = mode_cmd->width;
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fb->height = mode_cmd->height;
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for (i = 0; i < 4; i++) {
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fb->pitches[i] = mode_cmd->pitches[i];
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fb->offsets[i] = mode_cmd->offsets[i];
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}
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fb->modifier = mode_cmd->modifier[0];
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fb->flags = mode_cmd->flags;
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}
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EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
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/*
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* This is the minimal list of formats that seem to be safe for modeset use
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* with all current DRM drivers. Most hardware can actually support more
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* formats than this and drivers may specify a more accurate list when
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* creating the primary plane. However drivers that still call
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* drm_plane_init() will use this minimal format list as the default.
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*/
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static const uint32_t safe_modeset_formats[] = {
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_ARGB8888,
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};
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static struct drm_plane *create_primary_plane(struct drm_device *dev)
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{
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struct drm_plane *primary;
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int ret;
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primary = kzalloc(sizeof(*primary), GFP_KERNEL);
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if (primary == NULL) {
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DRM_DEBUG_KMS("Failed to allocate primary plane\n");
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return NULL;
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}
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/*
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* Remove the format_default field from drm_plane when dropping
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* this helper.
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*/
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primary->format_default = true;
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/* possible_crtc's will be filled in later by crtc_init */
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ret = drm_universal_plane_init(dev, primary, 0,
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&drm_primary_helper_funcs,
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safe_modeset_formats,
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ARRAY_SIZE(safe_modeset_formats),
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NULL,
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DRM_PLANE_TYPE_PRIMARY, NULL);
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if (ret) {
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kfree(primary);
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primary = NULL;
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}
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return primary;
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}
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/**
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* drm_crtc_init - Legacy CRTC initialization function
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* @dev: DRM device
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* @crtc: CRTC object to init
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* @funcs: callbacks for the new CRTC
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*
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* Initialize a CRTC object with a default helper-provided primary plane and no
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* cursor plane.
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*
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* Returns:
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* Zero on success, error code on failure.
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*/
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int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
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const struct drm_crtc_funcs *funcs)
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{
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struct drm_plane *primary;
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primary = create_primary_plane(dev);
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return drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs,
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NULL);
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}
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EXPORT_SYMBOL(drm_crtc_init);
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