303 lines
8.2 KiB
C
303 lines
8.2 KiB
C
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/*
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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/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/exynos_drm.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 exynos_drm_plane_state *exynos_state)
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{
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struct drm_plane_state *state = &exynos_state->base;
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struct drm_crtc *crtc = state->crtc;
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struct drm_crtc_state *crtc_state =
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drm_atomic_get_existing_crtc_state(state->state, crtc);
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struct drm_display_mode *mode = &crtc_state->adjusted_mode;
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int crtc_x, crtc_y;
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unsigned int crtc_w, crtc_h;
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unsigned int src_x, src_y;
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unsigned int src_w, src_h;
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unsigned int actual_w;
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unsigned int actual_h;
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/*
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* The original src/dest coordinates are stored in exynos_state->base,
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* but we want to keep another copy internal to our driver that we can
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* clip/modify ourselves.
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*/
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crtc_x = state->crtc_x;
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crtc_y = state->crtc_y;
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crtc_w = state->crtc_w;
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crtc_h = state->crtc_h;
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src_x = state->src_x >> 16;
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src_y = state->src_y >> 16;
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src_w = state->src_w >> 16;
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src_h = state->src_h >> 16;
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/* set ratio */
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exynos_state->h_ratio = (src_w << 16) / crtc_w;
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exynos_state->v_ratio = (src_h << 16) / crtc_h;
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/* clip to visible area */
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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) * exynos_state->h_ratio) >> 16;
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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) * exynos_state->v_ratio) >> 16;
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crtc_y = 0;
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}
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/* set drm framebuffer data. */
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exynos_state->src.x = src_x;
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exynos_state->src.y = src_y;
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exynos_state->src.w = (actual_w * exynos_state->h_ratio) >> 16;
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exynos_state->src.h = (actual_h * exynos_state->v_ratio) >> 16;
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/* set plane range to be displayed. */
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exynos_state->crtc.x = crtc_x;
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exynos_state->crtc.y = crtc_y;
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exynos_state->crtc.w = actual_w;
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exynos_state->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_state->crtc.x, exynos_state->crtc.y,
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exynos_state->crtc.w, exynos_state->crtc.h);
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}
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static void exynos_drm_plane_reset(struct drm_plane *plane)
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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_plane_state *exynos_state;
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if (plane->state) {
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exynos_state = to_exynos_plane_state(plane->state);
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if (exynos_state->base.fb)
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drm_framebuffer_unreference(exynos_state->base.fb);
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kfree(exynos_state);
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plane->state = NULL;
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}
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exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
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if (exynos_state) {
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plane->state = &exynos_state->base;
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plane->state->plane = plane;
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plane->state->zpos = exynos_plane->config->zpos;
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}
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}
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static struct drm_plane_state *
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exynos_drm_plane_duplicate_state(struct drm_plane *plane)
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{
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struct exynos_drm_plane_state *exynos_state;
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struct exynos_drm_plane_state *copy;
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exynos_state = to_exynos_plane_state(plane->state);
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copy = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
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if (!copy)
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return NULL;
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__drm_atomic_helper_plane_duplicate_state(plane, ©->base);
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return ©->base;
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}
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static void exynos_drm_plane_destroy_state(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_state *old_exynos_state =
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to_exynos_plane_state(old_state);
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__drm_atomic_helper_plane_destroy_state(old_state);
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kfree(old_exynos_state);
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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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.set_property = drm_atomic_helper_plane_set_property,
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.reset = exynos_drm_plane_reset,
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.atomic_duplicate_state = exynos_drm_plane_duplicate_state,
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.atomic_destroy_state = exynos_drm_plane_destroy_state,
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};
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static int
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exynos_drm_plane_check_size(const struct exynos_drm_plane_config *config,
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struct exynos_drm_plane_state *state)
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{
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bool width_ok = false, height_ok = false;
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if (config->capabilities & EXYNOS_DRM_PLANE_CAP_SCALE)
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return 0;
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if (state->src.w == state->crtc.w)
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width_ok = true;
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if (state->src.h == state->crtc.h)
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height_ok = true;
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if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
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state->h_ratio == (1 << 15))
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width_ok = true;
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if ((config->capabilities & EXYNOS_DRM_PLANE_CAP_DOUBLE) &&
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state->v_ratio == (1 << 15))
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height_ok = true;
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if (width_ok && height_ok)
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return 0;
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DRM_DEBUG_KMS("scaling mode is not supported");
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return -ENOTSUPP;
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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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struct exynos_drm_plane_state *exynos_state =
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to_exynos_plane_state(state);
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int ret = 0;
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if (!state->crtc || !state->fb)
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return 0;
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/* translate state into exynos_state */
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exynos_plane_mode_set(exynos_state);
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ret = exynos_drm_plane_check_size(exynos_plane->config, exynos_state);
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return ret;
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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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plane->crtc = state->crtc;
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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, 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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bool immutable)
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{
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/* FIXME */
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if (immutable)
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drm_plane_create_zpos_immutable_property(plane, 0);
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else
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drm_plane_create_zpos_property(plane, 0, 0, MAX_PLANE - 1);
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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 int index, unsigned long possible_crtcs,
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const struct exynos_drm_plane_config *config)
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{
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int err;
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err = drm_universal_plane_init(dev, &exynos_plane->base,
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possible_crtcs,
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&exynos_plane_funcs,
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config->pixel_formats,
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config->num_pixel_formats,
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config->type, NULL);
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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->index = index;
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exynos_plane->config = config;
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exynos_plane_attach_zpos_property(&exynos_plane->base,
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!(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
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return 0;
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}
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