linux/drivers/gpu/drm/nouveau/dispnv04/overlay.c

/*
 * Copyright 2013 Ilia Mirkin
 *
 * 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 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 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.
 *
 * Implementation based on the pre-KMS implementation in xf86-video-nouveau,
 * written by Arthur Huillet.
 */

#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>

#include "nouveau_drv.h"

#include "nouveau_bo.h"
#include "nouveau_connector.h"
#include "nouveau_display.h"
#include "nouveau_gem.h"
#include "nvreg.h"
#include "disp.h"

struct nouveau_plane { … };

static uint32_t formats[] = …;

/* Sine can be approximated with
 * http://en.wikipedia.org/wiki/Bhaskara_I's_sine_approximation_formula
 * sin(x degrees) ~= 4 x (180 - x) / (40500 - x (180 - x) )
 * Note that this only works for the range [0, 180].
 * Also note that sin(x) == -sin(x - 180)
 */
static inline int
sin_mul(int degrees, int factor)
{ … }

/* cos(x) = sin(x + 90) */
static inline int
cos_mul(int degrees, int factor)
{ … }

static int
verify_scaling(const struct drm_framebuffer *fb, uint8_t shift,
               uint32_t src_x, uint32_t src_y, uint32_t src_w, uint32_t src_h,
               uint32_t crtc_w, uint32_t crtc_h)
{ … }

static int
nv10_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
		  struct drm_framebuffer *fb, int crtc_x, int crtc_y,
		  unsigned int crtc_w, unsigned int crtc_h,
		  uint32_t src_x, uint32_t src_y,
		  uint32_t src_w, uint32_t src_h,
		  struct drm_modeset_acquire_ctx *ctx)
{ … }

static int
nv10_disable_plane(struct drm_plane *plane,
		   struct drm_modeset_acquire_ctx *ctx)
{ … }

static void
nv_destroy_plane(struct drm_plane *plane)
{ … }

static void
nv10_set_params(struct nouveau_plane *plane)
{ … }

static int
nv_set_property(struct drm_plane *plane,
		struct drm_property *property,
		uint64_t value)
{ … }

static const struct drm_plane_funcs nv10_plane_funcs = …;

static void
nv10_overlay_init(struct drm_device *device)
{ … }

static int
nv04_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
		  struct drm_framebuffer *fb, int crtc_x, int crtc_y,
		  unsigned int crtc_w, unsigned int crtc_h,
		  uint32_t src_x, uint32_t src_y,
		  uint32_t src_w, uint32_t src_h,
		  struct drm_modeset_acquire_ctx *ctx)
{ … }

static int
nv04_disable_plane(struct drm_plane *plane,
		   struct drm_modeset_acquire_ctx *ctx)
{ … }

static const struct drm_plane_funcs nv04_plane_funcs = …;

static void
nv04_overlay_init(struct drm_device *device)
{ … }

void
nouveau_overlay_init(struct drm_device *device)
{ … }