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/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* DOC: atomic plane helpers
*
* The functions here are used by the atomic plane helper functions to
* implement legacy plane updates (i.e., drm_plane->update_plane() and
* drm_plane->disable_plane()). This allows plane updates to use the
* atomic state infrastructure and perform plane updates as separate
* prepare/check/commit/cleanup steps.
*/
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include "intel_drv.h"
/**
* intel_plane_duplicate_state - duplicate plane state
* @plane: drm plane
*
* Allocates and returns a copy of the plane state (both common and
* Intel-specific) for the specified plane.
*
* Returns: The newly allocated plane state, or NULL or failure.
*/
struct drm_plane_state *
intel_plane_duplicate_state(struct drm_plane *plane)
{
struct intel_plane_state *state;
if (plane->state)
state = kmemdup(plane->state, sizeof(*state), GFP_KERNEL);
else
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
if (state->base.fb)
drm_framebuffer_reference(state->base.fb);
return &state->base;
}
/**
* intel_plane_destroy_state - destroy plane state
* @plane: drm plane
* @state: state object to destroy
*
* Destroys the plane state (both common and Intel-specific) for the
* specified plane.
*/
void
intel_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
drm_atomic_helper_plane_destroy_state(plane, state);
}
static int intel_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct drm_crtc *crtc = state->crtc;
struct intel_crtc *intel_crtc;
struct intel_plane *intel_plane = to_intel_plane(plane);
struct intel_plane_state *intel_state = to_intel_plane_state(state);
crtc = crtc ? crtc : plane->crtc;
intel_crtc = to_intel_crtc(crtc);
/*
* The original src/dest coordinates are stored in state->base, but
* we want to keep another copy internal to our driver that we can
* clip/modify ourselves.
*/
intel_state->src.x1 = state->src_x;
intel_state->src.y1 = state->src_y;
intel_state->src.x2 = state->src_x + state->src_w;
intel_state->src.y2 = state->src_y + state->src_h;
intel_state->dst.x1 = state->crtc_x;
intel_state->dst.y1 = state->crtc_y;
intel_state->dst.x2 = state->crtc_x + state->crtc_w;
intel_state->dst.y2 = state->crtc_y + state->crtc_h;
/* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
intel_state->clip.x1 = 0;
intel_state->clip.y1 = 0;
intel_state->clip.x2 =
intel_crtc->active ? intel_crtc->config->pipe_src_w : 0;
intel_state->clip.y2 =
intel_crtc->active ? intel_crtc->config->pipe_src_h : 0;
/*
* Disabling a plane is always okay; we just need to update
* fb tracking in a special way since cleanup_fb() won't
* get called by the plane helpers.
*/
if (state->fb == NULL && plane->state->fb != NULL) {
/*
* 'prepare' is never called when plane is being disabled, so
* we need to handle frontbuffer tracking as a special case
*/
intel_crtc->atomic.disabled_planes |=
(1 << drm_plane_index(plane));
}
return intel_plane->check_plane(plane, intel_state);
}
static void intel_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct intel_plane *intel_plane = to_intel_plane(plane);
struct intel_plane_state *intel_state =
to_intel_plane_state(plane->state);
/* Don't disable an already disabled plane */
if (!plane->state->fb && !old_state->fb)
return;
intel_plane->commit_plane(plane, intel_state);
}
const struct drm_plane_helper_funcs intel_plane_helper_funcs = {
.prepare_fb = intel_prepare_plane_fb,
.cleanup_fb = intel_cleanup_plane_fb,
.atomic_check = intel_plane_atomic_check,
.atomic_update = intel_plane_atomic_update,
};
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