[deliverable/linux.git] / drivers / gpu / drm / rcar-du / rcar_du_plane.c

/*
 * rcar_du_plane.c  --  R-Car Display Unit Planes
 *
 * Copyright (C) 2013-2014 Renesas Electronics Corporation
 *
 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_plane_helper.h>

#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_plane.h"
#include "rcar_du_regs.h"

#define RCAR_DU_COLORKEY_NONE		(0 << 24)
#define RCAR_DU_COLORKEY_SOURCE		(1 << 24)
#define RCAR_DU_COLORKEY_MASK		(1 << 24)

static inline struct rcar_du_plane *to_rcar_plane(struct drm_plane *plane)
{
	return container_of(plane, struct rcar_du_plane, plane);
}

static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
			      unsigned int index, u32 reg)
{
	return rcar_du_read(rgrp->dev,
			    rgrp->mmio_offset + index * PLANE_OFF + reg);
}

static void rcar_du_plane_write(struct rcar_du_group *rgrp,
				unsigned int index, u32 reg, u32 data)
{
	rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
		      data);
}

static int rcar_du_plane_reserve_check(struct rcar_du_plane *plane,
				       const struct rcar_du_format_info *format)
{
	struct rcar_du_group *rgrp = plane->group;
	unsigned int free;
	unsigned int i;
	int ret;

	mutex_lock(&rgrp->planes.lock);

	free = rgrp->planes.free;

	if (plane->hwindex != -1) {
		free |= 1 << plane->hwindex;
		if (plane->format->planes == 2)
			free |= 1 << ((plane->hwindex + 1) % 8);
	}

	for (i = 0; i < ARRAY_SIZE(rgrp->planes.planes); ++i) {
		if (!(free & (1 << i)))
			continue;

		if (format->planes == 1 || free & (1 << ((i + 1) % 8)))
			break;
	}

	ret = i == ARRAY_SIZE(rgrp->planes.planes) ? -EBUSY : 0;

	mutex_unlock(&rgrp->planes.lock);
	return ret;
}

static int rcar_du_plane_reserve(struct rcar_du_plane *plane,
				 const struct rcar_du_format_info *format)
{
	struct rcar_du_group *rgrp = plane->group;
	unsigned int i;
	int ret = -EBUSY;

	mutex_lock(&rgrp->planes.lock);

	for (i = 0; i < RCAR_DU_NUM_HW_PLANES; ++i) {
		if (!(rgrp->planes.free & (1 << i)))
			continue;

		if (format->planes == 1 ||
		    rgrp->planes.free & (1 << ((i + 1) % 8)))
			break;
	}

	if (i == RCAR_DU_NUM_HW_PLANES)
		goto done;

	rgrp->planes.free &= ~(1 << i);
	if (format->planes == 2)
		rgrp->planes.free &= ~(1 << ((i + 1) % 8));

	plane->hwindex = i;

	ret = 0;

done:
	mutex_unlock(&rgrp->planes.lock);
	return ret;
}

static void rcar_du_plane_release(struct rcar_du_plane *plane)
{
	struct rcar_du_group *rgrp = plane->group;

	if (plane->hwindex == -1)
		return;

	mutex_lock(&rgrp->planes.lock);
	rgrp->planes.free |= 1 << plane->hwindex;
	if (plane->format->planes == 2)
		rgrp->planes.free |= 1 << ((plane->hwindex + 1) % 8);
	mutex_unlock(&rgrp->planes.lock);

	plane->hwindex = -1;
}

static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
{
	struct drm_framebuffer *fb = plane->plane.state->fb;
	struct rcar_du_group *rgrp = plane->group;
	unsigned int src_x = plane->plane.state->src_x >> 16;
	unsigned int src_y = plane->plane.state->src_y >> 16;
	unsigned int index = plane->hwindex;
	struct drm_gem_cma_object *gem;
	bool interlaced;
	u32 mwr;

	interlaced = plane->crtc->mode.flags & DRM_MODE_FLAG_INTERLACE;

	/* Memory pitch (expressed in pixels). Must be doubled for interlaced
	 * operation with 32bpp formats.
	 */
	if (plane->format->planes == 2)
		mwr = fb->pitches[0];
	else
		mwr = fb->pitches[0] * 8 / plane->format->bpp;

	if (interlaced && plane->format->bpp == 32)
		mwr *= 2;

	rcar_du_plane_write(rgrp, index, PnMWR, mwr);

	/* The Y position is expressed in raster line units and must be doubled
	 * for 32bpp formats, according to the R8A7790 datasheet. No mention of
	 * doubling the Y position is found in the R8A7779 datasheet, but the
	 * rule seems to apply there as well.
	 *
	 * Despite not being documented, doubling seem not to be needed when
	 * operating in interlaced mode.
	 *
	 * Similarly, for the second plane, NV12 and NV21 formats seem to
	 * require a halved Y position value, in both progressive and interlaced
	 * modes.
	 */
	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
			    (!interlaced && plane->format->bpp == 32 ? 2 : 1));

	gem = drm_fb_cma_get_gem_obj(fb, 0);
	rcar_du_plane_write(rgrp, index, PnDSA0R, gem->paddr + fb->offsets[0]);

	if (plane->format->planes == 2) {
		index = (index + 1) % 8;

		rcar_du_plane_write(rgrp, index, PnMWR, fb->pitches[0]);

		rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
		rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
				    (plane->format->bpp == 16 ? 2 : 1) / 2);

		gem = drm_fb_cma_get_gem_obj(fb, 1);
		rcar_du_plane_write(rgrp, index, PnDSA0R,
				    gem->paddr + fb->offsets[1]);
	}
}

static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
				     unsigned int index)
{
	struct rcar_du_plane_state *state =
		to_rcar_du_plane_state(plane->plane.state);
	struct rcar_du_group *rgrp = plane->group;
	u32 colorkey;
	u32 pnmr;

	/* The PnALPHAR register controls alpha-blending in 16bpp formats
	 * (ARGB1555 and XRGB1555).
	 *
	 * For ARGB, set the alpha value to 0, and enable alpha-blending when
	 * the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
	 *
	 * For XRGB, set the alpha value to the plane-wide alpha value and
	 * enable alpha-blending regardless of the X bit value.
	 */
	if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
		rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
	else
		rcar_du_plane_write(rgrp, index, PnALPHAR,
				    PnALPHAR_ABIT_X | state->alpha);

	pnmr = PnMR_BM_MD | plane->format->pnmr;

	/* Disable color keying when requested. YUV formats have the
	 * PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
	 * automatically.
	 */
	if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
		pnmr |= PnMR_SPIM_TP_OFF;

	/* For packed YUV formats we need to select the U/V order. */
	if (plane->format->fourcc == DRM_FORMAT_YUYV)
		pnmr |= PnMR_YCDF_YUYV;

	rcar_du_plane_write(rgrp, index, PnMR, pnmr);

	switch (plane->format->fourcc) {
	case DRM_FORMAT_RGB565:
		colorkey = ((state->colorkey & 0xf80000) >> 8)
			 | ((state->colorkey & 0x00fc00) >> 5)
			 | ((state->colorkey & 0x0000f8) >> 3);
		rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
		break;

	case DRM_FORMAT_ARGB1555:
	case DRM_FORMAT_XRGB1555:
		colorkey = ((state->colorkey & 0xf80000) >> 9)
			 | ((state->colorkey & 0x00f800) >> 6)
			 | ((state->colorkey & 0x0000f8) >> 3);
		rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
		break;

	case DRM_FORMAT_XRGB8888:
	case DRM_FORMAT_ARGB8888:
		rcar_du_plane_write(rgrp, index, PnTC3R,
				    PnTC3R_CODE | (state->colorkey & 0xffffff));
		break;
	}
}

static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
				  unsigned int index)
{
	struct rcar_du_group *rgrp = plane->group;
	u32 ddcr2 = PnDDCR2_CODE;
	u32 ddcr4;

	/* Data format
	 *
	 * The data format is selected by the DDDF field in PnMR and the EDF
	 * field in DDCR4.
	 */
	ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
	ddcr4 &= ~PnDDCR4_EDF_MASK;
	ddcr4 |= plane->format->edf | PnDDCR4_CODE;

	rcar_du_plane_setup_mode(plane, index);

	if (plane->format->planes == 2) {
		if (plane->hwindex != index) {
			if (plane->format->fourcc == DRM_FORMAT_NV12 ||
			    plane->format->fourcc == DRM_FORMAT_NV21)
				ddcr2 |= PnDDCR2_Y420;

			if (plane->format->fourcc == DRM_FORMAT_NV21)
				ddcr2 |= PnDDCR2_NV21;

			ddcr2 |= PnDDCR2_DIVU;
		} else {
			ddcr2 |= PnDDCR2_DIVY;
		}
	}

	rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
	rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);

	/* Destination position and size */
	rcar_du_plane_write(rgrp, index, PnDSXR, plane->plane.state->crtc_w);
	rcar_du_plane_write(rgrp, index, PnDSYR, plane->plane.state->crtc_h);
	rcar_du_plane_write(rgrp, index, PnDPXR, plane->plane.state->crtc_x);
	rcar_du_plane_write(rgrp, index, PnDPYR, plane->plane.state->crtc_y);

	/* Wrap-around and blinking, disabled */
	rcar_du_plane_write(rgrp, index, PnWASPR, 0);
	rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
	rcar_du_plane_write(rgrp, index, PnBTR, 0);
	rcar_du_plane_write(rgrp, index, PnMLR, 0);
}

void rcar_du_plane_setup(struct rcar_du_plane *plane)
{
	__rcar_du_plane_setup(plane, plane->hwindex);
	if (plane->format->planes == 2)
		__rcar_du_plane_setup(plane, (plane->hwindex + 1) % 8);

	rcar_du_plane_setup_fb(plane);
}

static int rcar_du_plane_atomic_check(struct drm_plane *plane,
				      struct drm_plane_state *state)
{
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct rcar_du_device *rcdu = rplane->group->dev;
	const struct rcar_du_format_info *format;
	unsigned int nplanes;
	int ret;

	if (!state->fb || !state->crtc)
		return 0;

	if (state->src_w >> 16 != state->crtc_w ||
	    state->src_h >> 16 != state->crtc_h) {
		dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
		return -EINVAL;
	}

	format = rcar_du_format_info(state->fb->pixel_format);
	if (format == NULL) {
		dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
			state->fb->pixel_format);
		return -EINVAL;
	}

	nplanes = rplane->format ? rplane->format->planes : 0;

	/* If the number of required planes has changed we will need to
	 * reallocate hardware planes. Ensure free planes are available.
	 */
	if (format->planes != nplanes) {
		ret = rcar_du_plane_reserve_check(rplane, format);
		if (ret < 0) {
			dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
				__func__);
			return ret;
		}
	}

	return 0;
}

static void rcar_du_plane_disable(struct rcar_du_plane *rplane)
{
	if (!rplane->enabled)
		return;

	mutex_lock(&rplane->group->planes.lock);
	rplane->enabled = false;
	mutex_unlock(&rplane->group->planes.lock);

	rcar_du_plane_release(rplane);

	rplane->crtc = NULL;
	rplane->format = NULL;
}

static void rcar_du_plane_atomic_update(struct drm_plane *plane,
					struct drm_plane_state *old_state)
{
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct drm_plane_state *state = plane->state;
	const struct rcar_du_format_info *format;
	unsigned int nplanes;

	if (!state->crtc) {
		rcar_du_plane_disable(rplane);
		return;
	}

	format = rcar_du_format_info(state->fb->pixel_format);
	nplanes = rplane->format ? rplane->format->planes : 0;

	/* Reallocate hardware planes if the number of required planes has
	 * changed.
	 */
	if (format->planes != nplanes) {
		rcar_du_plane_release(rplane);
		rcar_du_plane_reserve(rplane, format);
	}

	rplane->crtc = state->crtc;
	rplane->format = format;

	rcar_du_plane_setup(rplane);

	mutex_lock(&rplane->group->planes.lock);
	rplane->enabled = true;
	mutex_unlock(&rplane->group->planes.lock);
}

static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
	.atomic_check = rcar_du_plane_atomic_check,
	.atomic_update = rcar_du_plane_atomic_update,
};

static void rcar_du_plane_reset(struct drm_plane *plane)
{
	struct rcar_du_plane_state *state;

	if (plane->state && plane->state->fb)
		drm_framebuffer_unreference(plane->state->fb);

	kfree(plane->state);
	plane->state = NULL;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (state == NULL)
		return;

	state->alpha = 255;
	state->colorkey = RCAR_DU_COLORKEY_NONE;
	state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;

	plane->state = &state->state;
	plane->state->plane = plane;
}

static struct drm_plane_state *
rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
{
	struct rcar_du_plane_state *state;
	struct rcar_du_plane_state *copy;

	state = to_rcar_du_plane_state(plane->state);
	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
	if (copy == NULL)
		return NULL;

	if (copy->state.fb)
		drm_framebuffer_reference(copy->state.fb);

	return &copy->state;
}

static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
					       struct drm_plane_state *state)
{
	kfree(to_rcar_du_plane_state(state));
}

static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
					     struct drm_plane_state *state,
					     struct drm_property *property,
					     uint64_t val)
{
	struct rcar_du_plane_state *rstate = to_rcar_du_plane_state(state);
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct rcar_du_group *rgrp = rplane->group;

	if (property == rgrp->planes.alpha)
		rstate->alpha = val;
	else if (property == rgrp->planes.colorkey)
		rstate->colorkey = val;
	else if (property == rgrp->planes.zpos)
		rstate->zpos = val;
	else
		return -EINVAL;

	return 0;
}

static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
	const struct drm_plane_state *state, struct drm_property *property,
	uint64_t *val)
{
	const struct rcar_du_plane_state *rstate =
		container_of(state, const struct rcar_du_plane_state, state);
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct rcar_du_group *rgrp = rplane->group;

	if (property == rgrp->planes.alpha)
		*val = rstate->alpha;
	else if (property == rgrp->planes.colorkey)
		*val = rstate->colorkey;
	else if (property == rgrp->planes.zpos)
		*val = rstate->zpos;
	else
		return -EINVAL;

	return 0;
}

static const struct drm_plane_funcs rcar_du_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.reset = rcar_du_plane_reset,
	.set_property = drm_atomic_helper_plane_set_property,
	.destroy = drm_plane_cleanup,
	.atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
	.atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
	.atomic_set_property = rcar_du_plane_atomic_set_property,
	.atomic_get_property = rcar_du_plane_atomic_get_property,
};

static const uint32_t formats[] = {
	DRM_FORMAT_RGB565,
	DRM_FORMAT_ARGB1555,
	DRM_FORMAT_XRGB1555,
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_UYVY,
	DRM_FORMAT_YUYV,
	DRM_FORMAT_NV12,
	DRM_FORMAT_NV21,
	DRM_FORMAT_NV16,
};

int rcar_du_planes_init(struct rcar_du_group *rgrp)
{
	struct rcar_du_planes *planes = &rgrp->planes;
	struct rcar_du_device *rcdu = rgrp->dev;
	unsigned int num_planes;
	unsigned int num_crtcs;
	unsigned int crtcs;
	unsigned int i;
	int ret;

	mutex_init(&planes->lock);
	planes->free = 0xff;

	planes->alpha =
		drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
	if (planes->alpha == NULL)
		return -ENOMEM;

	/* The color key is expressed as an RGB888 triplet stored in a 32-bit
	 * integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
	 * or enable source color keying (1).
	 */
	planes->colorkey =
		drm_property_create_range(rcdu->ddev, 0, "colorkey",
					  0, 0x01ffffff);
	if (planes->colorkey == NULL)
		return -ENOMEM;

	planes->zpos =
		drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
	if (planes->zpos == NULL)
		return -ENOMEM;

	 /* Create one primary plane per in this group CRTC and seven overlay
	  * planes.
	  */
	num_crtcs = min(rcdu->num_crtcs - 2 * rgrp->index, 2U);
	num_planes = num_crtcs + 7;

	crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));

	for (i = 0; i < num_planes; ++i) {
		enum drm_plane_type type = i < num_crtcs
					 ? DRM_PLANE_TYPE_PRIMARY
					 : DRM_PLANE_TYPE_OVERLAY;
		struct rcar_du_plane *plane = &planes->planes[i];

		plane->group = rgrp;
		plane->hwindex = -1;

		ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
					       &rcar_du_plane_funcs, formats,
					       ARRAY_SIZE(formats), type);
		if (ret < 0)
			return ret;

		drm_plane_helper_add(&plane->plane,
				     &rcar_du_plane_helper_funcs);

		if (type == DRM_PLANE_TYPE_PRIMARY)
			continue;

		drm_object_attach_property(&plane->plane.base,
					   planes->alpha, 255);
		drm_object_attach_property(&plane->plane.base,
					   planes->colorkey,
					   RCAR_DU_COLORKEY_NONE);
		drm_object_attach_property(&plane->plane.base,
					   planes->zpos, 1);
	}

	return 0;
}
Commit	Line	Data
4bf8e196 LP	1	/*
	2	* rcar_du_plane.c -- R-Car Display Unit Planes
	3	*
36d50464	4	* Copyright (C) 2013-2014 Renesas Electronics Corporation
4bf8e196 LP	5	*
	6	* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
	14	#include <drm/drmP.h>
3e8da87d	15	#include <drm/drm_atomic_helper.h>
4bf8e196 LP	16	#include <drm/drm_crtc.h>
	17	#include <drm/drm_crtc_helper.h>
	18	#include <drm/drm_fb_cma_helper.h>
	19	#include <drm/drm_gem_cma_helper.h>
920888a2	20	#include <drm/drm_plane_helper.h>
4bf8e196 LP	21
	22	#include "rcar_du_drv.h"
	23	#include "rcar_du_kms.h"
	24	#include "rcar_du_plane.h"
	25	#include "rcar_du_regs.h"
	26
	27	#define RCAR_DU_COLORKEY_NONE (0 << 24)
	28	#define RCAR_DU_COLORKEY_SOURCE (1 << 24)
	29	#define RCAR_DU_COLORKEY_MASK (1 << 24)
	30
4bf8e196 LP	31	static inline struct rcar_du_plane to_rcar_plane(struct drm_plane plane)
4bf8e196 LP	32	{
917de180	33	return container_of(plane, struct rcar_du_plane, plane);
4bf8e196 LP	34	}
4bf8e196 LP	35
cb2025d2	36	static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
4bf8e196 LP	37	unsigned int index, u32 reg)
4bf8e196 LP	38	{
cb2025d2 LP	39	return rcar_du_read(rgrp->dev,
cb2025d2 LP	40	rgrp->mmio_offset + index * PLANE_OFF + reg);
4bf8e196 LP	41	}
4bf8e196 LP	42
cb2025d2	43	static void rcar_du_plane_write(struct rcar_du_group *rgrp,
4bf8e196 LP	44	unsigned int index, u32 reg, u32 data)
4bf8e196 LP	45	{
cb2025d2 LP	46	rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
cb2025d2 LP	47	data);
4bf8e196 LP	48	}
4bf8e196 LP	49
920888a2 LP	50	static int rcar_du_plane_reserve_check(struct rcar_du_plane *plane,
	51	const struct rcar_du_format_info *format)
	52	{
	53	struct rcar_du_group *rgrp = plane->group;
	54	unsigned int free;
	55	unsigned int i;
	56	int ret;
	57
	58	mutex_lock(&rgrp->planes.lock);
	59
	60	free = rgrp->planes.free;
	61
	62	if (plane->hwindex != -1) {
	63	free \|= 1 << plane->hwindex;
	64	if (plane->format->planes == 2)
	65	free \|= 1 << ((plane->hwindex + 1) % 8);
	66	}
	67
	68	for (i = 0; i < ARRAY_SIZE(rgrp->planes.planes); ++i) {
	69	if (!(free & (1 << i)))
	70	continue;
	71
	72	if (format->planes == 1 \|\| free & (1 << ((i + 1) % 8)))
	73	break;
	74	}
	75
	76	ret = i == ARRAY_SIZE(rgrp->planes.planes) ? -EBUSY : 0;
	77
	78	mutex_unlock(&rgrp->planes.lock);
	79	return ret;
	80	}
	81
845f4635 LP	82	static int rcar_du_plane_reserve(struct rcar_du_plane *plane,
845f4635 LP	83	const struct rcar_du_format_info *format)
4bf8e196	84	{
cb2025d2	85	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	86	unsigned int i;
	87	int ret = -EBUSY;
	88
cb2025d2	89	mutex_lock(&rgrp->planes.lock);
4bf8e196	90
30534604	91	for (i = 0; i < RCAR_DU_NUM_HW_PLANES; ++i) {
cb2025d2	92	if (!(rgrp->planes.free & (1 << i)))
4bf8e196 LP	93	continue;
	94
	95	if (format->planes == 1 \|\|
cb2025d2	96	rgrp->planes.free & (1 << ((i + 1) % 8)))
4bf8e196 LP	97	break;
	98	}
	99
30534604	100	if (i == RCAR_DU_NUM_HW_PLANES)
4bf8e196 LP	101	goto done;
4bf8e196 LP	102
cb2025d2	103	rgrp->planes.free &= ~(1 << i);
4bf8e196	104	if (format->planes == 2)
cb2025d2	105	rgrp->planes.free &= ~(1 << ((i + 1) % 8));
4bf8e196 LP	106
	107	plane->hwindex = i;
	108
	109	ret = 0;
	110
	111	done:
cb2025d2	112	mutex_unlock(&rgrp->planes.lock);
4bf8e196 LP	113	return ret;
	114	}
	115
845f4635	116	static void rcar_du_plane_release(struct rcar_du_plane *plane)
4bf8e196	117	{
cb2025d2	118	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	119
	120	if (plane->hwindex == -1)
	121	return;
	122
cb2025d2 LP	123	mutex_lock(&rgrp->planes.lock);
cb2025d2 LP	124	rgrp->planes.free \|= 1 << plane->hwindex;
4bf8e196	125	if (plane->format->planes == 2)
cb2025d2 LP	126	rgrp->planes.free \|= 1 << ((plane->hwindex + 1) % 8);
cb2025d2 LP	127	mutex_unlock(&rgrp->planes.lock);
4bf8e196 LP	128
	129	plane->hwindex = -1;
	130	}
	131
f398f344	132	static void rcar_du_plane_setup_fb(struct rcar_du_plane *plane)
4bf8e196	133	{
f398f344	134	struct drm_framebuffer *fb = plane->plane.state->fb;
cb2025d2	135	struct rcar_du_group *rgrp = plane->group;
287bdf03 LP	136	unsigned int src_x = plane->plane.state->src_x >> 16;
287bdf03 LP	137	unsigned int src_y = plane->plane.state->src_y >> 16;
4bf8e196	138	unsigned int index = plane->hwindex;
f398f344	139	struct drm_gem_cma_object *gem;
906eff7f	140	bool interlaced;
eb86301f LP	141	u32 mwr;
eb86301f LP	142
906eff7f LP	143	interlaced = plane->crtc->mode.flags & DRM_MODE_FLAG_INTERLACE;
	144
	145	/* Memory pitch (expressed in pixels). Must be doubled for interlaced
	146	* operation with 32bpp formats.
	147	*/
eb86301f	148	if (plane->format->planes == 2)
f398f344	149	mwr = fb->pitches[0];
eb86301f	150	else
f398f344	151	mwr = fb->pitches[0] * 8 / plane->format->bpp;
eb86301f	152
906eff7f LP	153	if (interlaced && plane->format->bpp == 32)
	154	mwr *= 2;
	155
eb86301f	156	rcar_du_plane_write(rgrp, index, PnMWR, mwr);
4bf8e196	157
9e7db06d LP	158	/* The Y position is expressed in raster line units and must be doubled
	159	* for 32bpp formats, according to the R8A7790 datasheet. No mention of
	160	* doubling the Y position is found in the R8A7779 datasheet, but the
	161	* rule seems to apply there as well.
	162	*
906eff7f LP	163	* Despite not being documented, doubling seem not to be needed when
	164	* operating in interlaced mode.
	165	*
9e7db06d	166	* Similarly, for the second plane, NV12 and NV21 formats seem to
906eff7f LP	167	* require a halved Y position value, in both progressive and interlaced
906eff7f LP	168	* modes.
4bf8e196	169	*/
287bdf03 LP	170	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
287bdf03 LP	171	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
906eff7f	172	(!interlaced && plane->format->bpp == 32 ? 2 : 1));
f398f344 LP	173
	174	gem = drm_fb_cma_get_gem_obj(fb, 0);
	175	rcar_du_plane_write(rgrp, index, PnDSA0R, gem->paddr + fb->offsets[0]);
4bf8e196 LP	176
	177	if (plane->format->planes == 2) {
	178	index = (index + 1) % 8;
	179
f398f344	180	rcar_du_plane_write(rgrp, index, PnMWR, fb->pitches[0]);
49785e25	181
287bdf03 LP	182	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
287bdf03 LP	183	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
4bf8e196	184	(plane->format->bpp == 16 ? 2 : 1) / 2);
eb86301f	185
4bf8e196	186	gem = drm_fb_cma_get_gem_obj(fb, 1);
f398f344 LP	187	rcar_du_plane_write(rgrp, index, PnDSA0R,
f398f344 LP	188	gem->paddr + fb->offsets[1]);
4bf8e196 LP	189	}
	190	}
	191
	192	static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
	193	unsigned int index)
	194	{
4407cc02 LP	195	struct rcar_du_plane_state *state =
4407cc02 LP	196	to_rcar_du_plane_state(plane->plane.state);
cb2025d2	197	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	198	u32 colorkey;
	199	u32 pnmr;
	200
	201	/* The PnALPHAR register controls alpha-blending in 16bpp formats
	202	* (ARGB1555 and XRGB1555).
	203	*
	204	* For ARGB, set the alpha value to 0, and enable alpha-blending when
	205	* the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
	206	*
	207	* For XRGB, set the alpha value to the plane-wide alpha value and
	208	* enable alpha-blending regardless of the X bit value.
	209	*/
	210	if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
cb2025d2	211	rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
4bf8e196	212	else
cb2025d2	213	rcar_du_plane_write(rgrp, index, PnALPHAR,
4407cc02	214	PnALPHAR_ABIT_X \| state->alpha);
4bf8e196 LP	215
	216	pnmr = PnMR_BM_MD \| plane->format->pnmr;
	217
	218	/* Disable color keying when requested. YUV formats have the
	219	* PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
	220	* automatically.
	221	*/
4407cc02	222	if ((state->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
4bf8e196 LP	223	pnmr \|= PnMR_SPIM_TP_OFF;
	224
	225	/* For packed YUV formats we need to select the U/V order. */
	226	if (plane->format->fourcc == DRM_FORMAT_YUYV)
	227	pnmr \|= PnMR_YCDF_YUYV;
	228
cb2025d2	229	rcar_du_plane_write(rgrp, index, PnMR, pnmr);
4bf8e196 LP	230
	231	switch (plane->format->fourcc) {
	232	case DRM_FORMAT_RGB565:
4407cc02 LP	233	colorkey = ((state->colorkey & 0xf80000) >> 8)
	234	\| ((state->colorkey & 0x00fc00) >> 5)
	235	\| ((state->colorkey & 0x0000f8) >> 3);
cb2025d2	236	rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
4bf8e196 LP	237	break;
	238
	239	case DRM_FORMAT_ARGB1555:
	240	case DRM_FORMAT_XRGB1555:
4407cc02 LP	241	colorkey = ((state->colorkey & 0xf80000) >> 9)
	242	\| ((state->colorkey & 0x00f800) >> 6)
	243	\| ((state->colorkey & 0x0000f8) >> 3);
cb2025d2	244	rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
4bf8e196 LP	245	break;
	246
	247	case DRM_FORMAT_XRGB8888:
	248	case DRM_FORMAT_ARGB8888:
cb2025d2	249	rcar_du_plane_write(rgrp, index, PnTC3R,
4407cc02	250	PnTC3R_CODE \| (state->colorkey & 0xffffff));
4bf8e196 LP	251	break;
	252	}
	253	}
	254
	255	static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
	256	unsigned int index)
	257	{
cb2025d2	258	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	259	u32 ddcr2 = PnDDCR2_CODE;
4bf8e196 LP	260	u32 ddcr4;
4bf8e196 LP	261
	262	/* Data format
	263	*
	264	* The data format is selected by the DDDF field in PnMR and the EDF
	265	* field in DDCR4.
	266	*/
cb2025d2	267	ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
4bf8e196 LP	268	ddcr4 &= ~PnDDCR4_EDF_MASK;
	269	ddcr4 \|= plane->format->edf \| PnDDCR4_CODE;
	270
	271	rcar_du_plane_setup_mode(plane, index);
	272
	273	if (plane->format->planes == 2) {
	274	if (plane->hwindex != index) {
	275	if (plane->format->fourcc == DRM_FORMAT_NV12 \|\|
	276	plane->format->fourcc == DRM_FORMAT_NV21)
	277	ddcr2 \|= PnDDCR2_Y420;
	278
	279	if (plane->format->fourcc == DRM_FORMAT_NV21)
	280	ddcr2 \|= PnDDCR2_NV21;
	281
	282	ddcr2 \|= PnDDCR2_DIVU;
	283	} else {
	284	ddcr2 \|= PnDDCR2_DIVY;
	285	}
	286	}
	287
cb2025d2 LP	288	rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
cb2025d2 LP	289	rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
4bf8e196	290
4bf8e196	291	/* Destination position and size */
287bdf03 LP	292	rcar_du_plane_write(rgrp, index, PnDSXR, plane->plane.state->crtc_w);
	293	rcar_du_plane_write(rgrp, index, PnDSYR, plane->plane.state->crtc_h);
	294	rcar_du_plane_write(rgrp, index, PnDPXR, plane->plane.state->crtc_x);
	295	rcar_du_plane_write(rgrp, index, PnDPYR, plane->plane.state->crtc_y);
4bf8e196 LP	296
4bf8e196 LP	297	/* Wrap-around and blinking, disabled */
cb2025d2 LP	298	rcar_du_plane_write(rgrp, index, PnWASPR, 0);
	299	rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
	300	rcar_du_plane_write(rgrp, index, PnBTR, 0);
	301	rcar_du_plane_write(rgrp, index, PnMLR, 0);
4bf8e196 LP	302	}
	303
	304	void rcar_du_plane_setup(struct rcar_du_plane *plane)
	305	{
	306	__rcar_du_plane_setup(plane, plane->hwindex);
	307	if (plane->format->planes == 2)
	308	__rcar_du_plane_setup(plane, (plane->hwindex + 1) % 8);
	309
f398f344	310	rcar_du_plane_setup_fb(plane);
4bf8e196 LP	311	}
4bf8e196 LP	312
920888a2 LP	313	static int rcar_du_plane_atomic_check(struct drm_plane *plane,
920888a2 LP	314	struct drm_plane_state *state)
4bf8e196 LP	315	{
4bf8e196 LP	316	struct rcar_du_plane *rplane = to_rcar_plane(plane);
cb2025d2	317	struct rcar_du_device *rcdu = rplane->group->dev;
4bf8e196 LP	318	const struct rcar_du_format_info *format;
	319	unsigned int nplanes;
	320	int ret;
	321
920888a2 LP	322	if (!state->fb \|\| !state->crtc)
920888a2 LP	323	return 0;
917de180	324
920888a2 LP	325	if (state->src_w >> 16 != state->crtc_w \|\|
	326	state->src_h >> 16 != state->crtc_h) {
	327	dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
4bf8e196 LP	328	return -EINVAL;
	329	}
	330
920888a2 LP	331	format = rcar_du_format_info(state->fb->pixel_format);
	332	if (format == NULL) {
	333	dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
	334	state->fb->pixel_format);
4bf8e196 LP	335	return -EINVAL;
	336	}
	337
	338	nplanes = rplane->format ? rplane->format->planes : 0;
	339
920888a2 LP	340	/* If the number of required planes has changed we will need to
920888a2 LP	341	* reallocate hardware planes. Ensure free planes are available.
4bf8e196 LP	342	*/
4bf8e196 LP	343	if (format->planes != nplanes) {
920888a2 LP	344	ret = rcar_du_plane_reserve_check(rplane, format);
	345	if (ret < 0) {
	346	dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
	347	__func__);
4bf8e196	348	return ret;
920888a2	349	}
4bf8e196 LP	350	}
4bf8e196 LP	351
4bf8e196 LP	352	return 0;
	353	}
	354
920888a2	355	static void rcar_du_plane_disable(struct rcar_du_plane *rplane)
4bf8e196	356	{
4bf8e196	357	if (!rplane->enabled)
920888a2	358	return;
4bf8e196	359
cb2025d2	360	mutex_lock(&rplane->group->planes.lock);
4bf8e196	361	rplane->enabled = false;
cb2025d2	362	mutex_unlock(&rplane->group->planes.lock);
4bf8e196 LP	363
	364	rcar_du_plane_release(rplane);
	365
	366	rplane->crtc = NULL;
	367	rplane->format = NULL;
920888a2	368	}
4bf8e196	369
920888a2 LP	370	static void rcar_du_plane_atomic_update(struct drm_plane *plane,
	371	struct drm_plane_state *old_state)
	372	{
	373	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	374	struct drm_plane_state *state = plane->state;
	375	const struct rcar_du_format_info *format;
	376	unsigned int nplanes;
	377
	378	if (!state->crtc) {
	379	rcar_du_plane_disable(rplane);
	380	return;
	381	}
	382
	383	format = rcar_du_format_info(state->fb->pixel_format);
	384	nplanes = rplane->format ? rplane->format->planes : 0;
	385
	386	/* Reallocate hardware planes if the number of required planes has
	387	* changed.
	388	*/
	389	if (format->planes != nplanes) {
	390	rcar_du_plane_release(rplane);
	391	rcar_du_plane_reserve(rplane, format);
	392	}
	393
	394	rplane->crtc = state->crtc;
	395	rplane->format = format;
	396
920888a2 LP	397	rcar_du_plane_setup(rplane);
	398
	399	mutex_lock(&rplane->group->planes.lock);
	400	rplane->enabled = true;
920888a2	401	mutex_unlock(&rplane->group->planes.lock);
4bf8e196 LP	402	}
4bf8e196 LP	403
920888a2 LP	404	static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
	405	.atomic_check = rcar_du_plane_atomic_check,
	406	.atomic_update = rcar_du_plane_atomic_update,
	407	};
	408
4407cc02	409	static void rcar_du_plane_reset(struct drm_plane *plane)
4bf8e196	410	{
4407cc02 LP	411	struct rcar_du_plane_state *state;
	412
	413	if (plane->state && plane->state->fb)
	414	drm_framebuffer_unreference(plane->state->fb);
4bf8e196	415
4407cc02 LP	416	kfree(plane->state);
	417	plane->state = NULL;
	418
	419	state = kzalloc(sizeof(*state), GFP_KERNEL);
	420	if (state == NULL)
4bf8e196 LP	421	return;
4bf8e196 LP	422
4407cc02 LP	423	state->alpha = 255;
	424	state->colorkey = RCAR_DU_COLORKEY_NONE;
	425	state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
	426
	427	plane->state = &state->state;
	428	plane->state->plane = plane;
4bf8e196 LP	429	}
4bf8e196 LP	430
4407cc02 LP	431	static struct drm_plane_state *
4407cc02 LP	432	rcar_du_plane_atomic_duplicate_state(struct drm_plane *plane)
4bf8e196	433	{
4407cc02 LP	434	struct rcar_du_plane_state *state;
4407cc02 LP	435	struct rcar_du_plane_state *copy;
4bf8e196	436
4407cc02 LP	437	state = to_rcar_du_plane_state(plane->state);
	438	copy = kmemdup(state, sizeof(*state), GFP_KERNEL);
	439	if (copy == NULL)
	440	return NULL;
	441
	442	if (copy->state.fb)
	443	drm_framebuffer_reference(copy->state.fb);
4bf8e196	444
4407cc02	445	return &copy->state;
4bf8e196 LP	446	}
4bf8e196 LP	447
4407cc02 LP	448	static void rcar_du_plane_atomic_destroy_state(struct drm_plane *plane,
4407cc02 LP	449	struct drm_plane_state *state)
4bf8e196	450	{
4407cc02 LP	451	kfree(to_rcar_du_plane_state(state));
4407cc02 LP	452	}
4bf8e196	453
4407cc02 LP	454	static int rcar_du_plane_atomic_set_property(struct drm_plane *plane,
	455	struct drm_plane_state *state,
	456	struct drm_property *property,
	457	uint64_t val)
	458	{
	459	struct rcar_du_plane_state *rstate = to_rcar_du_plane_state(state);
	460	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	461	struct rcar_du_group *rgrp = rplane->group;
4bf8e196	462
4407cc02 LP	463	if (property == rgrp->planes.alpha)
	464	rstate->alpha = val;
	465	else if (property == rgrp->planes.colorkey)
	466	rstate->colorkey = val;
	467	else if (property == rgrp->planes.zpos)
	468	rstate->zpos = val;
	469	else
	470	return -EINVAL;
4bf8e196	471
4407cc02	472	return 0;
4bf8e196 LP	473	}
4bf8e196 LP	474
4407cc02 LP	475	static int rcar_du_plane_atomic_get_property(struct drm_plane *plane,
	476	const struct drm_plane_state state, struct drm_property property,
	477	uint64_t *val)
4bf8e196	478	{
4407cc02 LP	479	const struct rcar_du_plane_state *rstate =
4407cc02 LP	480	container_of(state, const struct rcar_du_plane_state, state);
4bf8e196	481	struct rcar_du_plane *rplane = to_rcar_plane(plane);
cb2025d2	482	struct rcar_du_group *rgrp = rplane->group;
4bf8e196	483
cb2025d2	484	if (property == rgrp->planes.alpha)
4407cc02	485	*val = rstate->alpha;
cb2025d2	486	else if (property == rgrp->planes.colorkey)
4407cc02	487	*val = rstate->colorkey;
cb2025d2	488	else if (property == rgrp->planes.zpos)
4407cc02	489	*val = rstate->zpos;
4bf8e196 LP	490	else
	491	return -EINVAL;
	492
	493	return 0;
	494	}
	495
	496	static const struct drm_plane_funcs rcar_du_plane_funcs = {
336d04a1 LP	497	.update_plane = drm_atomic_helper_update_plane,
336d04a1 LP	498	.disable_plane = drm_atomic_helper_disable_plane,
4407cc02 LP	499	.reset = rcar_du_plane_reset,
4407cc02 LP	500	.set_property = drm_atomic_helper_plane_set_property,
4bf8e196	501	.destroy = drm_plane_cleanup,
4407cc02 LP	502	.atomic_duplicate_state = rcar_du_plane_atomic_duplicate_state,
	503	.atomic_destroy_state = rcar_du_plane_atomic_destroy_state,
	504	.atomic_set_property = rcar_du_plane_atomic_set_property,
	505	.atomic_get_property = rcar_du_plane_atomic_get_property,
4bf8e196 LP	506	};
	507
	508	static const uint32_t formats[] = {
	509	DRM_FORMAT_RGB565,
	510	DRM_FORMAT_ARGB1555,
	511	DRM_FORMAT_XRGB1555,
	512	DRM_FORMAT_XRGB8888,
	513	DRM_FORMAT_ARGB8888,
	514	DRM_FORMAT_UYVY,
	515	DRM_FORMAT_YUYV,
	516	DRM_FORMAT_NV12,
	517	DRM_FORMAT_NV21,
	518	DRM_FORMAT_NV16,
	519	};
	520
cb2025d2	521	int rcar_du_planes_init(struct rcar_du_group *rgrp)
4bf8e196	522	{
cb2025d2 LP	523	struct rcar_du_planes *planes = &rgrp->planes;
cb2025d2 LP	524	struct rcar_du_device *rcdu = rgrp->dev;
917de180 LP	525	unsigned int num_planes;
	526	unsigned int num_crtcs;
	527	unsigned int crtcs;
4bf8e196	528	unsigned int i;
917de180	529	int ret;
4bf8e196	530
cb2025d2 LP	531	mutex_init(&planes->lock);
cb2025d2 LP	532	planes->free = 0xff;
4bf8e196	533
cb2025d2	534	planes->alpha =
4bf8e196	535	drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
cb2025d2	536	if (planes->alpha == NULL)
4bf8e196 LP	537	return -ENOMEM;
	538
	539	/* The color key is expressed as an RGB888 triplet stored in a 32-bit
	540	* integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
	541	* or enable source color keying (1).
	542	*/
cb2025d2	543	planes->colorkey =
4bf8e196 LP	544	drm_property_create_range(rcdu->ddev, 0, "colorkey",
4bf8e196 LP	545	0, 0x01ffffff);
cb2025d2	546	if (planes->colorkey == NULL)
4bf8e196 LP	547	return -ENOMEM;
4bf8e196 LP	548
cb2025d2	549	planes->zpos =
4bf8e196	550	drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
cb2025d2	551	if (planes->zpos == NULL)
4bf8e196 LP	552	return -ENOMEM;
4bf8e196 LP	553
917de180 LP	554	/* Create one primary plane per in this group CRTC and seven overlay
	555	* planes.
	556	*/
	557	num_crtcs = min(rcdu->num_crtcs - 2 * rgrp->index, 2U);
	558	num_planes = num_crtcs + 7;
	559
	560	crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
	561
	562	for (i = 0; i < num_planes; ++i) {
	563	enum drm_plane_type type = i < num_crtcs
	564	? DRM_PLANE_TYPE_PRIMARY
	565	: DRM_PLANE_TYPE_OVERLAY;
cb2025d2	566	struct rcar_du_plane *plane = &planes->planes[i];
4bf8e196	567
cb2025d2	568	plane->group = rgrp;
4bf8e196	569	plane->hwindex = -1;
4bf8e196	570
917de180 LP	571	ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
	572	&rcar_du_plane_funcs, formats,
	573	ARRAY_SIZE(formats), type);
4bf8e196 LP	574	if (ret < 0)
	575	return ret;
	576
920888a2 LP	577	drm_plane_helper_add(&plane->plane,
	578	&rcar_du_plane_helper_funcs);
	579
917de180 LP	580	if (type == DRM_PLANE_TYPE_PRIMARY)
	581	continue;
	582
4bf8e196	583	drm_object_attach_property(&plane->plane.base,
cb2025d2	584	planes->alpha, 255);
4bf8e196	585	drm_object_attach_property(&plane->plane.base,
cb2025d2	586	planes->colorkey,
4bf8e196 LP	587	RCAR_DU_COLORKEY_NONE);
4bf8e196 LP	588	drm_object_attach_property(&plane->plane.base,
cb2025d2	589	planes->zpos, 1);
4bf8e196 LP	590	}
	591
	592	return 0;
	593	}