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![Sam Ravnborg](/assets/img/avatar_default.png)
The use of the drmP.h header file is deprecated. Remove use from all files in drm/* so people do not look there and follow a bad example. Build tested allyesconfig,allmodconfig on x86, arm etc. Including alpha that is as always more challenging than the rest. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Daniel Vetter <daniel@ffwll.ch> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <maxime.ripard@bootlin.com> Cc: Sean Paul <sean@poorly.run> Cc: David Airlie <airlied@linux.ie> Link: https://patchwork.freedesktop.org/patch/msgid/20190526173535.32701-8-sam@ravnborg.org
249 lines
7.7 KiB
C
249 lines
7.7 KiB
C
/*
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* Copyright (C) 2014 Intel Corporation
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*
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* DRM universal plane helper functions
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/list.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_atomic_uapi.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_device.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_rect.h>
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#define SUBPIXEL_MASK 0xffff
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/**
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* DOC: overview
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*
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* This helper library has two parts. The first part has support to implement
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* primary plane support on top of the normal CRTC configuration interface.
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* Since the legacy &drm_mode_config_funcs.set_config interface ties the primary
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* plane together with the CRTC state this does not allow userspace to disable
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* the primary plane itself. The default primary plane only expose XRBG8888 and
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* ARGB8888 as valid pixel formats for the attached framebuffer.
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*
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* Drivers are highly recommended to implement proper support for primary
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* planes, and newly merged drivers must not rely upon these transitional
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* helpers.
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*
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* The second part also implements transitional helpers which allow drivers to
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* gradually switch to the atomic helper infrastructure for plane updates. Once
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* that switch is complete drivers shouldn't use these any longer, instead using
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* the proper legacy implementations for update and disable plane hooks provided
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* by the atomic helpers.
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*
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* Again drivers are strongly urged to switch to the new interfaces.
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*
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* The plane helpers share the function table structures with other helpers,
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* specifically also the atomic helpers. See &struct drm_plane_helper_funcs for
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* the details.
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*/
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/*
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* Returns the connectors currently associated with a CRTC. This function
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* should be called twice: once with a NULL connector list to retrieve
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* the list size, and once with the properly allocated list to be filled in.
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*/
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static int get_connectors_for_crtc(struct drm_crtc *crtc,
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struct drm_connector **connector_list,
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int num_connectors)
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{
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struct drm_device *dev = crtc->dev;
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struct drm_connector *connector;
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struct drm_connector_list_iter conn_iter;
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int count = 0;
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/*
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* Note: Once we change the plane hooks to more fine-grained locking we
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* need to grab the connection_mutex here to be able to make these
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* checks.
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*/
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WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
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drm_connector_list_iter_begin(dev, &conn_iter);
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drm_for_each_connector_iter(connector, &conn_iter) {
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if (connector->encoder && connector->encoder->crtc == crtc) {
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if (connector_list != NULL && count < num_connectors)
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*(connector_list++) = connector;
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count++;
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}
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}
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drm_connector_list_iter_end(&conn_iter);
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return count;
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}
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static int drm_plane_helper_check_update(struct drm_plane *plane,
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struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_rect *src,
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struct drm_rect *dst,
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unsigned int rotation,
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int min_scale,
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int max_scale,
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bool can_position,
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bool can_update_disabled,
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bool *visible)
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{
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struct drm_plane_state plane_state = {
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.plane = plane,
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.crtc = crtc,
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.fb = fb,
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.src_x = src->x1,
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.src_y = src->y1,
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.src_w = drm_rect_width(src),
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.src_h = drm_rect_height(src),
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.crtc_x = dst->x1,
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.crtc_y = dst->y1,
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.crtc_w = drm_rect_width(dst),
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.crtc_h = drm_rect_height(dst),
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.rotation = rotation,
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.visible = *visible,
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};
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struct drm_crtc_state crtc_state = {
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.crtc = crtc,
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.enable = crtc->enabled,
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.mode = crtc->mode,
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};
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int ret;
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ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
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min_scale, max_scale,
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can_position,
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can_update_disabled);
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if (ret)
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return ret;
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*src = plane_state.src;
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*dst = plane_state.dst;
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*visible = plane_state.visible;
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return 0;
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}
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static int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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int crtc_x, int crtc_y,
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unsigned int crtc_w, unsigned int crtc_h,
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uint32_t src_x, uint32_t src_y,
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uint32_t src_w, uint32_t src_h,
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struct drm_modeset_acquire_ctx *ctx)
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{
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struct drm_mode_set set = {
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.crtc = crtc,
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.fb = fb,
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.mode = &crtc->mode,
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.x = src_x >> 16,
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.y = src_y >> 16,
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};
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struct drm_rect src = {
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.x1 = src_x,
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.y1 = src_y,
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.x2 = src_x + src_w,
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.y2 = src_y + src_h,
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};
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struct drm_rect dest = {
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.x1 = crtc_x,
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.y1 = crtc_y,
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.x2 = crtc_x + crtc_w,
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.y2 = crtc_y + crtc_h,
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};
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struct drm_connector **connector_list;
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int num_connectors, ret;
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bool visible;
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ret = drm_plane_helper_check_update(plane, crtc, fb,
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&src, &dest,
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DRM_MODE_ROTATE_0,
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DRM_PLANE_HELPER_NO_SCALING,
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DRM_PLANE_HELPER_NO_SCALING,
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false, false, &visible);
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if (ret)
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return ret;
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if (!visible)
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/*
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* Primary plane isn't visible. Note that unless a driver
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* provides their own disable function, this will just
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* wind up returning -EINVAL to userspace.
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*/
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return plane->funcs->disable_plane(plane, ctx);
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/* Find current connectors for CRTC */
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num_connectors = get_connectors_for_crtc(crtc, NULL, 0);
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BUG_ON(num_connectors == 0);
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connector_list = kcalloc(num_connectors, sizeof(*connector_list),
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GFP_KERNEL);
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if (!connector_list)
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return -ENOMEM;
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get_connectors_for_crtc(crtc, connector_list, num_connectors);
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set.connectors = connector_list;
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set.num_connectors = num_connectors;
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/*
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* We call set_config() directly here rather than using
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* drm_mode_set_config_internal. We're reprogramming the same
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* connectors that were already in use, so we shouldn't need the extra
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* cross-CRTC fb refcounting to accomodate stealing connectors.
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* drm_mode_setplane() already handles the basic refcounting for the
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* framebuffers involved in this operation.
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*/
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ret = crtc->funcs->set_config(&set, ctx);
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kfree(connector_list);
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return ret;
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}
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static int drm_primary_helper_disable(struct drm_plane *plane,
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struct drm_modeset_acquire_ctx *ctx)
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{
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return -EINVAL;
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}
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/**
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* drm_primary_helper_destroy() - Helper for primary plane destruction
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* @plane: plane to destroy
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*
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* Provides a default plane destroy handler for primary planes. This handler
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* is called during CRTC destruction. We disable the primary plane, remove
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* it from the DRM plane list, and deallocate the plane structure.
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*/
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void drm_primary_helper_destroy(struct drm_plane *plane)
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{
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drm_plane_cleanup(plane);
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kfree(plane);
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}
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EXPORT_SYMBOL(drm_primary_helper_destroy);
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const struct drm_plane_funcs drm_primary_helper_funcs = {
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.update_plane = drm_primary_helper_update,
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.disable_plane = drm_primary_helper_disable,
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.destroy = drm_primary_helper_destroy,
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};
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EXPORT_SYMBOL(drm_primary_helper_funcs);
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