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/*
* Copyright (c) 2015 MediaTek Inc.
* Author: CK Hu <ck.hu@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_plane_helper.h>
#include "mtk_drm_crtc.h"
#include "mtk_drm_ddp_comp.h"
#include "mtk_drm_drv.h"
#include "mtk_drm_fb.h"
#include "mtk_drm_gem.h"
#include "mtk_drm_plane.h"
static const u32 formats[] = {
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_RGB565,
};
static void mtk_plane_enable(struct mtk_drm_plane *mtk_plane, bool enable,
dma_addr_t addr, struct drm_rect *dest)
{
struct drm_plane *plane = &mtk_plane->base;
struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
unsigned int pitch, format;
int x, y;
if (WARN_ON(!plane->state || (enable && !plane->state->fb)))
return;
if (plane->state->fb) {
pitch = plane->state->fb->pitches[0];
format = plane->state->fb->pixel_format;
} else {
pitch = 0;
format = DRM_FORMAT_RGBA8888;
}
x = plane->state->crtc_x;
y = plane->state->crtc_y;
if (x < 0) {
addr -= x * 4;
x = 0;
}
if (y < 0) {
addr -= y * pitch;
y = 0;
}
state->pending.enable = enable;
state->pending.pitch = pitch;
state->pending.format = format;
state->pending.addr = addr;
state->pending.x = x;
state->pending.y = y;
state->pending.width = dest->x2 - dest->x1;
state->pending.height = dest->y2 - dest->y1;
wmb(); /* Make sure the above parameters are set before update */
state->pending.dirty = true;
}
static void mtk_plane_reset(struct drm_plane *plane)
{
struct mtk_plane_state *state;
if (plane->state) {
if (plane->state->fb)
drm_framebuffer_unreference(plane->state->fb);
state = to_mtk_plane_state(plane->state);
memset(state, 0, sizeof(*state));
} else {
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return;
plane->state = &state->base;
}
state->base.plane = plane;
state->pending.format = DRM_FORMAT_RGB565;
}
static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
{
struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
struct mtk_plane_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, &state->base);
WARN_ON(state->base.plane != plane);
state->pending = old_state->pending;
return &state->base;
}
static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
__drm_atomic_helper_plane_destroy_state(state);
kfree(to_mtk_plane_state(state));
}
static const struct drm_plane_funcs mtk_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.reset = mtk_plane_reset,
.atomic_duplicate_state = mtk_plane_duplicate_state,
.atomic_destroy_state = mtk_drm_plane_destroy_state,
};
static int mtk_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct drm_framebuffer *fb = state->fb;
struct drm_crtc_state *crtc_state;
bool visible;
struct drm_rect dest = {
.x1 = state->crtc_x,
.y1 = state->crtc_y,
.x2 = state->crtc_x + state->crtc_w,
.y2 = state->crtc_y + state->crtc_h,
};
struct drm_rect src = {
/* 16.16 fixed point */
.x1 = state->src_x,
.y1 = state->src_y,
.x2 = state->src_x + state->src_w,
.y2 = state->src_y + state->src_h,
};
struct drm_rect clip = { 0, };
if (!fb)
return 0;
if (!mtk_fb_get_gem_obj(fb)) {
DRM_DEBUG_KMS("buffer is null\n");
return -EFAULT;
}
if (!state->crtc)
return 0;
crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
clip.x2 = crtc_state->mode.hdisplay;
clip.y2 = crtc_state->mode.vdisplay;
return drm_plane_helper_check_update(plane, state->crtc, fb,
&src, &dest, &clip,
DRM_PLANE_HELPER_NO_SCALING,
DRM_PLANE_HELPER_NO_SCALING,
true, true, &visible);
}
static void mtk_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
struct drm_crtc *crtc = state->base.crtc;
struct drm_gem_object *gem;
struct mtk_drm_gem_obj *mtk_gem;
struct mtk_drm_plane *mtk_plane = to_mtk_plane(plane);
struct drm_rect dest = {
.x1 = state->base.crtc_x,
.y1 = state->base.crtc_y,
.x2 = state->base.crtc_x + state->base.crtc_w,
.y2 = state->base.crtc_y + state->base.crtc_h,
};
struct drm_rect clip = { 0, };
if (!crtc)
return;
clip.x2 = state->base.crtc->state->mode.hdisplay;
clip.y2 = state->base.crtc->state->mode.vdisplay;
drm_rect_intersect(&dest, &clip);
gem = mtk_fb_get_gem_obj(state->base.fb);
mtk_gem = to_mtk_gem_obj(gem);
mtk_plane_enable(mtk_plane, true, mtk_gem->dma_addr, &dest);
}
static void mtk_plane_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
state->pending.enable = false;
wmb(); /* Make sure the above parameter is set before update */
state->pending.dirty = true;
}
static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
.atomic_check = mtk_plane_atomic_check,
.atomic_update = mtk_plane_atomic_update,
.atomic_disable = mtk_plane_atomic_disable,
};
int mtk_plane_init(struct drm_device *dev, struct mtk_drm_plane *mtk_plane,
unsigned long possible_crtcs, enum drm_plane_type type,
unsigned int zpos)
{
int err;
err = drm_universal_plane_init(dev, &mtk_plane->base, possible_crtcs,
&mtk_plane_funcs, formats,
ARRAY_SIZE(formats), type, NULL);
if (err) {
DRM_ERROR("failed to initialize plane\n");
return err;
}
drm_plane_helper_add(&mtk_plane->base, &mtk_plane_helper_funcs);
mtk_plane->idx = zpos;
return 0;
}
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