154 lines
5.0 KiB
C
154 lines
5.0 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
* that the name of the copyright holders not be used in advertising or
|
|
* publicity pertaining to distribution of the software without specific,
|
|
* written prior permission. The copyright holders make no representations
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
* is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
* OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <drm/drm_modeset_helper.h>
|
|
#include <drm/drm_plane_helper.h>
|
|
|
|
/**
|
|
* DOC: aux kms helpers
|
|
*
|
|
* This helper library contains various one-off functions which don't really fit
|
|
* anywhere else in the DRM modeset helper library.
|
|
*/
|
|
|
|
/**
|
|
* drm_helper_move_panel_connectors_to_head() - move panels to the front in the
|
|
* connector list
|
|
* @dev: drm device to operate on
|
|
*
|
|
* Some userspace presumes that the first connected connector is the main
|
|
* display, where it's supposed to display e.g. the login screen. For
|
|
* laptops, this should be the main panel. Use this function to sort all
|
|
* (eDP/LVDS) panels to the front of the connector list, instead of
|
|
* painstakingly trying to initialize them in the right order.
|
|
*/
|
|
void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
|
|
{
|
|
struct drm_connector *connector, *tmp;
|
|
struct list_head panel_list;
|
|
|
|
INIT_LIST_HEAD(&panel_list);
|
|
|
|
list_for_each_entry_safe(connector, tmp,
|
|
&dev->mode_config.connector_list, head) {
|
|
if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS ||
|
|
connector->connector_type == DRM_MODE_CONNECTOR_eDP)
|
|
list_move_tail(&connector->head, &panel_list);
|
|
}
|
|
|
|
list_splice(&panel_list, &dev->mode_config.connector_list);
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
|
|
|
|
/**
|
|
* drm_helper_mode_fill_fb_struct - fill out framebuffer metadata
|
|
* @fb: drm_framebuffer object to fill out
|
|
* @mode_cmd: metadata from the userspace fb creation request
|
|
*
|
|
* This helper can be used in a drivers fb_create callback to pre-fill the fb's
|
|
* metadata fields.
|
|
*/
|
|
void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
const struct drm_mode_fb_cmd2 *mode_cmd)
|
|
{
|
|
int i;
|
|
|
|
fb->width = mode_cmd->width;
|
|
fb->height = mode_cmd->height;
|
|
for (i = 0; i < 4; i++) {
|
|
fb->pitches[i] = mode_cmd->pitches[i];
|
|
fb->offsets[i] = mode_cmd->offsets[i];
|
|
fb->modifier[i] = mode_cmd->modifier[i];
|
|
}
|
|
drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth,
|
|
&fb->bits_per_pixel);
|
|
fb->pixel_format = mode_cmd->pixel_format;
|
|
fb->flags = mode_cmd->flags;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
|
|
|
|
/*
|
|
* This is the minimal list of formats that seem to be safe for modeset use
|
|
* with all current DRM drivers. Most hardware can actually support more
|
|
* formats than this and drivers may specify a more accurate list when
|
|
* creating the primary plane. However drivers that still call
|
|
* drm_plane_init() will use this minimal format list as the default.
|
|
*/
|
|
static const uint32_t safe_modeset_formats[] = {
|
|
DRM_FORMAT_XRGB8888,
|
|
DRM_FORMAT_ARGB8888,
|
|
};
|
|
|
|
static struct drm_plane *create_primary_plane(struct drm_device *dev)
|
|
{
|
|
struct drm_plane *primary;
|
|
int ret;
|
|
|
|
primary = kzalloc(sizeof(*primary), GFP_KERNEL);
|
|
if (primary == NULL) {
|
|
DRM_DEBUG_KMS("Failed to allocate primary plane\n");
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Remove the format_default field from drm_plane when dropping
|
|
* this helper.
|
|
*/
|
|
primary->format_default = true;
|
|
|
|
/* possible_crtc's will be filled in later by crtc_init */
|
|
ret = drm_universal_plane_init(dev, primary, 0,
|
|
&drm_primary_helper_funcs,
|
|
safe_modeset_formats,
|
|
ARRAY_SIZE(safe_modeset_formats),
|
|
DRM_PLANE_TYPE_PRIMARY, NULL);
|
|
if (ret) {
|
|
kfree(primary);
|
|
primary = NULL;
|
|
}
|
|
|
|
return primary;
|
|
}
|
|
|
|
/**
|
|
* drm_crtc_init - Legacy CRTC initialization function
|
|
* @dev: DRM device
|
|
* @crtc: CRTC object to init
|
|
* @funcs: callbacks for the new CRTC
|
|
*
|
|
* Initialize a CRTC object with a default helper-provided primary plane and no
|
|
* cursor plane.
|
|
*
|
|
* Returns:
|
|
* Zero on success, error code on failure.
|
|
*/
|
|
int drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
|
|
const struct drm_crtc_funcs *funcs)
|
|
{
|
|
struct drm_plane *primary;
|
|
|
|
primary = create_primary_plane(dev);
|
|
return drm_crtc_init_with_planes(dev, crtc, primary, NULL, funcs,
|
|
NULL);
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_init);
|