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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* Freescale DCU drm device driver
*/
#include <linux/regmap.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#include "fsl_dcu_drm_drv.h"
#include "fsl_dcu_drm_plane.h"
static int fsl_dcu_drm_plane_index(struct drm_plane *plane)
{
struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
unsigned int total_layer = fsl_dev->soc->total_layer;
unsigned int index;
index = drm_plane_index(plane);
if (index < total_layer)
return total_layer - index - 1;
dev_err(fsl_dev->dev, "No more layer left\n");
return -EINVAL;
}
static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct drm_framebuffer *fb = new_plane_state->fb;
if (!new_plane_state->fb || !new_plane_state->crtc)
return 0;
switch (fb->format->format) {
case DRM_FORMAT_RGB565:
case DRM_FORMAT_RGB888:
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XRGB4444:
case DRM_FORMAT_ARGB4444:
case DRM_FORMAT_XRGB1555:
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_YUV422:
return 0;
default:
return -EINVAL;
}
}
static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
unsigned int value;
int index;
index = fsl_dcu_drm_plane_index(plane);
if (index < 0)
return;
regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value);
value &= ~DCU_LAYER_EN;
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value);
}
static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
plane);
struct drm_framebuffer *fb = plane->state->fb;
struct drm_gem_cma_object *gem;
unsigned int alpha = DCU_LAYER_AB_NONE, bpp;
int index;
if (!fb)
return;
index = fsl_dcu_drm_plane_index(plane);
if (index < 0)
return;
gem = drm_fb_cma_get_gem_obj(fb, 0);
switch (fb->format->format) {
case DRM_FORMAT_RGB565:
bpp = FSL_DCU_RGB565;
break;
case DRM_FORMAT_RGB888:
bpp = FSL_DCU_RGB888;
break;
case DRM_FORMAT_ARGB8888:
alpha = DCU_LAYER_AB_WHOLE_FRAME;
fallthrough;
case DRM_FORMAT_XRGB8888:
bpp = FSL_DCU_ARGB8888;
break;
case DRM_FORMAT_ARGB4444:
alpha = DCU_LAYER_AB_WHOLE_FRAME;
fallthrough;
case DRM_FORMAT_XRGB4444:
bpp = FSL_DCU_ARGB4444;
break;
case DRM_FORMAT_ARGB1555:
alpha = DCU_LAYER_AB_WHOLE_FRAME;
fallthrough;
case DRM_FORMAT_XRGB1555:
bpp = FSL_DCU_ARGB1555;
break;
case DRM_FORMAT_YUV422:
bpp = FSL_DCU_YUV422;
break;
default:
return;
}
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
DCU_LAYER_HEIGHT(new_state->crtc_h) |
DCU_LAYER_WIDTH(new_state->crtc_w));
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
DCU_LAYER_POSY(new_state->crtc_y) |
DCU_LAYER_POSX(new_state->crtc_x));
regmap_write(fsl_dev->regmap,
DCU_CTRLDESCLN(index, 3), gem->paddr);
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
DCU_LAYER_EN |
DCU_LAYER_TRANS(0xff) |
DCU_LAYER_BPP(bpp) |
alpha);
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
DCU_LAYER_CKMAX_R(0xFF) |
DCU_LAYER_CKMAX_G(0xFF) |
DCU_LAYER_CKMAX_B(0xFF));
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
DCU_LAYER_CKMIN_R(0) |
DCU_LAYER_CKMIN_G(0) |
DCU_LAYER_CKMIN_B(0));
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0);
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
DCU_LAYER_FG_FCOLOR(0));
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
DCU_LAYER_BG_BCOLOR(0));
if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
DCU_LAYER_POST_SKIP(0) |
DCU_LAYER_PRE_SKIP(0));
}
return;
}
static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
.atomic_check = fsl_dcu_drm_plane_atomic_check,
.atomic_disable = fsl_dcu_drm_plane_atomic_disable,
.atomic_update = fsl_dcu_drm_plane_atomic_update,
};
static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.destroy = drm_plane_helper_destroy,
.disable_plane = drm_atomic_helper_disable_plane,
.reset = drm_atomic_helper_plane_reset,
.update_plane = drm_atomic_helper_update_plane,
};
static const u32 fsl_dcu_drm_plane_formats[] = {
DRM_FORMAT_RGB565,
DRM_FORMAT_RGB888,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB4444,
DRM_FORMAT_ARGB4444,
DRM_FORMAT_XRGB1555,
DRM_FORMAT_ARGB1555,
DRM_FORMAT_YUV422,
};
void fsl_dcu_drm_init_planes(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
int i, j;
for (i = 0; i < fsl_dev->soc->total_layer; i++) {
for (j = 1; j <= fsl_dev->soc->layer_regs; j++)
regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(i, j), 0);
}
}
struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
{
struct drm_plane *primary;
int ret;
primary = kzalloc(sizeof(*primary), GFP_KERNEL);
if (!primary) {
DRM_DEBUG_KMS("Failed to allocate primary plane\n");
return NULL;
}
/* possible_crtc's will be filled in later by crtc_init */
ret = drm_universal_plane_init(dev, primary, 0,
&fsl_dcu_drm_plane_funcs,
fsl_dcu_drm_plane_formats,
ARRAY_SIZE(fsl_dcu_drm_plane_formats),
NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret) {
kfree(primary);
primary = NULL;
}
drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs);
return primary;
}
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