mirror of https://gitee.com/openkylin/linux.git
246 lines
6.5 KiB
C
246 lines
6.5 KiB
C
/*
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* Copyright (C) 2011 Samsung Electronics Co.Ltd
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* Authors: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <drm/drmP.h>
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#include <drm/exynos_drm.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_crtc.h"
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#include "exynos_drm_fb.h"
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#include "exynos_drm_gem.h"
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#include "exynos_drm_plane.h"
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/*
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* This function is to get X or Y size shown via screen. This needs length and
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* start position of CRTC.
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*
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* <--- length --->
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* CRTC ----------------
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* ^ start ^ end
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*
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* There are six cases from a to f.
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*
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* <----- SCREEN ----->
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* 0 last
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* ----------|------------------|----------
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* CRTCs
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* a -------
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* b -------
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* c --------------------------
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* d --------
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* e -------
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* f -------
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*/
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static int exynos_plane_get_size(int start, unsigned length, unsigned last)
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{
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int end = start + length;
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int size = 0;
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if (start <= 0) {
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if (end > 0)
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size = min_t(unsigned, end, last);
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} else if (start <= last) {
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size = min_t(unsigned, last - start, length);
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}
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return size;
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}
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static void exynos_plane_mode_set(struct drm_plane *plane,
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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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{
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struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
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struct drm_display_mode *mode = &crtc->state->adjusted_mode;
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unsigned int actual_w;
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unsigned int actual_h;
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actual_w = exynos_plane_get_size(crtc_x, crtc_w, mode->hdisplay);
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actual_h = exynos_plane_get_size(crtc_y, crtc_h, mode->vdisplay);
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if (crtc_x < 0) {
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if (actual_w)
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src_x -= crtc_x;
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crtc_x = 0;
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}
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if (crtc_y < 0) {
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if (actual_h)
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src_y -= crtc_y;
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crtc_y = 0;
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}
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/* set ratio */
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exynos_plane->h_ratio = (src_w << 16) / crtc_w;
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exynos_plane->v_ratio = (src_h << 16) / crtc_h;
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/* set drm framebuffer data. */
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exynos_plane->src_x = src_x;
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exynos_plane->src_y = src_y;
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exynos_plane->src_w = (actual_w * exynos_plane->h_ratio) >> 16;
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exynos_plane->src_h = (actual_h * exynos_plane->v_ratio) >> 16;
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/* set plane range to be displayed. */
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exynos_plane->crtc_x = crtc_x;
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exynos_plane->crtc_y = crtc_y;
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exynos_plane->crtc_w = actual_w;
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exynos_plane->crtc_h = actual_h;
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DRM_DEBUG_KMS("plane : offset_x/y(%d,%d), width/height(%d,%d)",
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exynos_plane->crtc_x, exynos_plane->crtc_y,
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exynos_plane->crtc_w, exynos_plane->crtc_h);
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plane->crtc = crtc;
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}
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static struct drm_plane_funcs exynos_plane_funcs = {
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.update_plane = drm_atomic_helper_update_plane,
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.disable_plane = drm_atomic_helper_disable_plane,
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.destroy = drm_plane_cleanup,
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.reset = drm_atomic_helper_plane_reset,
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.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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};
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static int exynos_plane_atomic_check(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
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int nr;
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int i;
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if (!state->fb)
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return 0;
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nr = drm_format_num_planes(state->fb->pixel_format);
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for (i = 0; i < nr; i++) {
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struct exynos_drm_gem *exynos_gem =
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exynos_drm_fb_gem(state->fb, i);
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if (!exynos_gem) {
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DRM_DEBUG_KMS("gem object is null\n");
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return -EFAULT;
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}
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exynos_plane->dma_addr[i] = exynos_gem->dma_addr +
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state->fb->offsets[i];
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DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
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i, (unsigned long)exynos_plane->dma_addr[i]);
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}
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return 0;
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}
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static void exynos_plane_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct drm_plane_state *state = plane->state;
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(state->crtc);
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struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
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if (!state->crtc)
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return;
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exynos_plane_mode_set(plane, state->crtc, state->fb,
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state->crtc_x, state->crtc_y,
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state->crtc_w, state->crtc_h,
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state->src_x >> 16, state->src_y >> 16,
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state->src_w >> 16, state->src_h >> 16);
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exynos_plane->pending_fb = state->fb;
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if (exynos_crtc->ops->update_plane)
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exynos_crtc->ops->update_plane(exynos_crtc, exynos_plane);
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}
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static void exynos_plane_atomic_disable(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(old_state->crtc);
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if (!old_state->crtc)
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return;
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if (exynos_crtc->ops->disable_plane)
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exynos_crtc->ops->disable_plane(exynos_crtc,
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exynos_plane);
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}
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static const struct drm_plane_helper_funcs plane_helper_funcs = {
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.atomic_check = exynos_plane_atomic_check,
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.atomic_update = exynos_plane_atomic_update,
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.atomic_disable = exynos_plane_atomic_disable,
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};
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static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
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unsigned int zpos)
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{
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struct drm_device *dev = plane->dev;
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struct exynos_drm_private *dev_priv = dev->dev_private;
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struct drm_property *prop;
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prop = dev_priv->plane_zpos_property;
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if (!prop) {
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prop = drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE,
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"zpos", 0, MAX_PLANE - 1);
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if (!prop)
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return;
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dev_priv->plane_zpos_property = prop;
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}
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drm_object_attach_property(&plane->base, prop, zpos);
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}
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enum drm_plane_type exynos_plane_get_type(unsigned int zpos,
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unsigned int cursor_win)
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{
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if (zpos == DEFAULT_WIN)
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return DRM_PLANE_TYPE_PRIMARY;
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else if (zpos == cursor_win)
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return DRM_PLANE_TYPE_CURSOR;
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else
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return DRM_PLANE_TYPE_OVERLAY;
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}
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int exynos_plane_init(struct drm_device *dev,
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struct exynos_drm_plane *exynos_plane,
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unsigned long possible_crtcs, enum drm_plane_type type,
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const uint32_t *formats, unsigned int fcount,
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unsigned int zpos)
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{
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int err;
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err = drm_universal_plane_init(dev, &exynos_plane->base, possible_crtcs,
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&exynos_plane_funcs, formats, fcount,
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type);
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if (err) {
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DRM_ERROR("failed to initialize plane\n");
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return err;
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}
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drm_plane_helper_add(&exynos_plane->base, &plane_helper_funcs);
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exynos_plane->zpos = zpos;
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if (type == DRM_PLANE_TYPE_OVERLAY)
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exynos_plane_attach_zpos_property(&exynos_plane->base, zpos);
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return 0;
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}
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