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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 

#include 

#include 

#include "intel_drv.h"

/**

 * intel_create_plane_state - create plane state object

 * @plane: drm plane

 *

 * Allocates a fresh plane state for the given plane and sets some of

 * the state values to sensible initial values.

 *

 * Returns: A newly allocated plane state, or NULL on failure

 */

struct intel_plane_state *

intel_create_plane_state(struct drm_plane *plane)

{

	struct intel_plane_state *state;

	state = kzalloc(sizeof(*state), GFP_KERNEL);

	if (!state)

		return NULL;

	state->base.plane = plane;

	state->base.rotation = BIT(DRM_ROTATE_0);

	state->ckey.flags = I915_SET_COLORKEY_NONE;

	return state;

}

/**

 * 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 on failure.

 */

struct drm_plane_state *

intel_plane_duplicate_state(struct drm_plane *plane)

{

	struct drm_plane_state *state;

	struct intel_plane_state *intel_state;

	intel_state = kmemdup(plane->state, sizeof(*intel_state), GFP_KERNEL);

	if (!intel_state)

		return NULL;

	state = &intel_state->base;

	__drm_atomic_helper_plane_duplicate_state(plane, state);

	intel_state->wait_req = NULL;

	return state;

}

/**

 * 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)

{

	WARN_ON(state && to_intel_plane_state(state)->wait_req);

	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_crtc_state *crtc_state;

	struct intel_plane *intel_plane = to_intel_plane(plane);

	struct intel_plane_state *intel_state = to_intel_plane_state(state);

	struct drm_crtc_state *drm_crtc_state;

	int ret;

	crtc = crtc ? crtc : plane->state->crtc;

	intel_crtc = to_intel_crtc(crtc);

	/*

	 * Both crtc and plane->crtc could be NULL if we're updating a

	 * property while the plane is disabled.  We don't actually have

	 * anything driver-specific we need to test in that case, so

	 * just return success.

	 */

	if (!crtc)

		return 0;

	drm_crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);

	if (WARN_ON(!drm_crtc_state))

		return -EINVAL;

	crtc_state = to_intel_crtc_state(drm_crtc_state);

	/*

	 * 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 =

		crtc_state->base.active ? crtc_state->pipe_src_w : 0;

	intel_state->clip.y2 =

		crtc_state->base.active ? crtc_state->pipe_src_h : 0;

	if (state->fb && intel_rotation_90_or_270(state->rotation)) {

		if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||

			state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {

			DRM_DEBUG_KMS("Y/Yf tiling required for 90/270!\n");

			return -EINVAL;

		}

		/*

		 * 90/270 is not allowed with RGB64 16:16:16:16,

		 * RGB 16-bit 5:6:5, and Indexed 8-bit.

		 * TBD: Add RGB64 case once its added in supported format list.

		 */

		switch (state->fb->pixel_format) {

		case DRM_FORMAT_C8:

		case DRM_FORMAT_RGB565:

			DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",

					drm_get_format_name(state->fb->pixel_format));

			return -EINVAL;

		default:

			break;

		}

	}

	intel_state->visible = false;

	ret = intel_plane->check_plane(plane, crtc_state, intel_state);

	if (ret)

		return ret;

	return intel_plane_atomic_calc_changes(&crtc_state->base, 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);

	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,

};

/**

 * intel_plane_atomic_get_property - fetch plane property value

 * @plane: plane to fetch property for

 * @state: state containing the property value

 * @property: property to look up

 * @val: pointer to write property value into

 *

 * The DRM core does not store shadow copies of properties for

 * atomic-capable drivers.  This entrypoint is used to fetch

 * the current value of a driver-specific plane property.

 */

int

intel_plane_atomic_get_property(struct drm_plane *plane,

				const struct drm_plane_state *state,

				struct drm_property *property,

				uint64_t *val)

{

	DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);

	return -EINVAL;

}

/**

 * intel_plane_atomic_set_property - set plane property value

 * @plane: plane to set property for

 * @state: state to update property value in

 * @property: property to set

 * @val: value to set property to

 *

 * Writes the specified property value for a plane into the provided atomic

 * state object.

 *

 * Returns 0 on success, -EINVAL on unrecognized properties

 */

int

intel_plane_atomic_set_property(struct drm_plane *plane,

				struct drm_plane_state *state,

				struct drm_property *property,

				uint64_t val)

{

	DRM_DEBUG_KMS("Unknown plane property '%s'\n", property->name);

	return -EINVAL;

}