Quelle  sti_plane.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) STMicroelectronics SA 2014
 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
 *          Fabien Dessenne <fabien.dessenne@st.com>
 *          for STMicroelectronics.
 */

#include <linux/types.h>

#include <drm/drm_blend.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_dma_helper.h>

#include "sti_compositor.h"
#include "sti_drv.h"
#include "sti_plane.h"

const char *sti_plane_to_str(struct sti_plane *plane)
{
 switch (plane->desc) {
 case STI_GDP_0:
  return "GDP0";
 case STI_GDP_1:
  return "GDP1";
 case STI_GDP_2:
  return "GDP2";
 case STI_GDP_3:
  return "GDP3";
 case STI_HQVDP_0:
  return "HQVDP0";
 case STI_CURSOR:
  return "CURSOR";
 default:
  return "";
 }
}

#define STI_FPS_INTERVAL_MS     3000

void sti_plane_update_fps(struct sti_plane *plane,
     bool new_frame,
     bool new_field)
{
 struct drm_plane_state *state = plane->drm_plane.state;
 ktime_t now;
 struct sti_fps_info *fps;
 int fpks, fipks, ms_since_last, num_frames, num_fields;

 now = ktime_get();

 /* Compute number of frame updates */
 fps = &plane->fps_info;

 if (new_field)
  fps->curr_field_counter++;

 /* do not perform fps calcul if new_frame is false */
 if (!new_frame)
  return;

 fps->curr_frame_counter++;
 ms_since_last = ktime_to_ms(ktime_sub(now, fps->last_timestamp));
 num_frames = fps->curr_frame_counter - fps->last_frame_counter;

 if (num_frames <= 0  || ms_since_last < STI_FPS_INTERVAL_MS)
  return;

 fps->last_timestamp = now;
 fps->last_frame_counter = fps->curr_frame_counter;

 if (state->fb) {
  fpks = (num_frames * 1000000) / ms_since_last;
  snprintf(plane->fps_info.fps_str, FPS_LENGTH,
    "%-8s %4dx%-4d %.4s @ %3d.%-3.3d fps (%s)",
    plane->drm_plane.name,
    state->fb->width,
    state->fb->height,
    (char *)&state->fb->format->format,
    fpks / 1000, fpks % 1000,
    sti_plane_to_str(plane));
 }

 if (fps->curr_field_counter) {
  /* Compute number of field updates */
  num_fields = fps->curr_field_counter - fps->last_field_counter;
  fps->last_field_counter = fps->curr_field_counter;
  fipks = (num_fields * 1000000) / ms_since_last;
  snprintf(plane->fps_info.fips_str,
    FPS_LENGTH, " - %3d.%-3.3d field/sec",
    fipks / 1000, fipks % 1000);
 } else {
  plane->fps_info.fips_str[0] = '\0';
 }

 if (fps->output)
  DRM_INFO("%s%s\n",
    plane->fps_info.fps_str,
    plane->fps_info.fips_str);
}

static int sti_plane_get_default_zpos(enum drm_plane_type type)
{
 switch (type) {
 case DRM_PLANE_TYPE_PRIMARY:
  return 0;
 case DRM_PLANE_TYPE_OVERLAY:
  return 1;
 case DRM_PLANE_TYPE_CURSOR:
  return 7;
 }
 return 0;
}

static void sti_plane_attach_zorder_property(struct drm_plane *drm_plane,
          enum drm_plane_type type)
{
 int zpos = sti_plane_get_default_zpos(type);

 switch (type) {
 case DRM_PLANE_TYPE_PRIMARY:
 case DRM_PLANE_TYPE_OVERLAY:
  drm_plane_create_zpos_property(drm_plane, zpos, 0, 6);
  break;
 case DRM_PLANE_TYPE_CURSOR:
  drm_plane_create_zpos_immutable_property(drm_plane, zpos);
  break;
 }
}

void sti_plane_init_property(struct sti_plane *plane,
        enum drm_plane_type type)
{
 sti_plane_attach_zorder_property(&plane->drm_plane, type);

 DRM_DEBUG_DRIVER("drm plane:%d mapped to %s\n",
    plane->drm_plane.base.id, sti_plane_to_str(plane));
}