[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;
}

void rcar_du_plane_update_base(struct rcar_du_plane *plane)
{
	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;
	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 = plane->pitch;
	else
		mwr = plane->pitch * 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));
	rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);

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

		rcar_du_plane_write(rgrp, index, PnMWR, plane->pitch);

		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);
		rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[1]);
	}
}

void rcar_du_plane_compute_base(struct rcar_du_plane *plane,
				struct drm_framebuffer *fb)
{
	struct drm_gem_cma_object *gem;

	plane->pitch = fb->pitches[0];

	gem = drm_fb_cma_get_gem_obj(fb, 0);
	plane->dma[0] = gem->paddr + fb->offsets[0];

	if (plane->format->planes == 2) {
		gem = drm_fb_cma_get_gem_obj(fb, 1);
		plane->dma[1] = gem->paddr + fb->offsets[1];
	}
}

static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
				     unsigned int index)
{
	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 | plane->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 ((plane->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 = ((plane->colorkey & 0xf80000) >> 8)
			 | ((plane->colorkey & 0x00fc00) >> 5)
			 | ((plane->colorkey & 0x0000f8) >> 3);
		rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
		break;

	case DRM_FORMAT_ARGB1555:
	case DRM_FORMAT_XRGB1555:
		colorkey = ((plane->colorkey & 0xf80000) >> 9)
			 | ((plane->colorkey & 0x00f800) >> 6)
			 | ((plane->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 | (plane->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_update_base(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_compute_base(rplane, state->fb);
	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,
};

/* Both the .set_property and the .update_plane operations are called with the
 * mode_config lock held. There is this no need to explicitly protect access to
 * the alpha and colorkey fields and the mode register.
 */
static void rcar_du_plane_set_alpha(struct rcar_du_plane *plane, u32 alpha)
{
	if (plane->alpha == alpha)
		return;

	plane->alpha = alpha;
	if (!plane->enabled || plane->format->fourcc != DRM_FORMAT_XRGB1555)
		return;

	rcar_du_plane_setup_mode(plane, plane->hwindex);
}

static void rcar_du_plane_set_colorkey(struct rcar_du_plane *plane,
				       u32 colorkey)
{
	if (plane->colorkey == colorkey)
		return;

	plane->colorkey = colorkey;
	if (!plane->enabled)
		return;

	rcar_du_plane_setup_mode(plane, plane->hwindex);
}

static void rcar_du_plane_set_zpos(struct rcar_du_plane *plane,
				   unsigned int zpos)
{
	mutex_lock(&plane->group->planes.lock);
	if (plane->zpos == zpos)
		goto done;

	plane->zpos = zpos;
	if (!plane->enabled)
		goto done;

	rcar_du_crtc_update_planes(plane->crtc);

done:
	mutex_unlock(&plane->group->planes.lock);
}

static int rcar_du_plane_set_property(struct drm_plane *plane,
				      struct drm_property *property,
				      uint64_t value)
{
	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	struct rcar_du_group *rgrp = rplane->group;

	if (property == rgrp->planes.alpha)
		rcar_du_plane_set_alpha(rplane, value);
	else if (property == rgrp->planes.colorkey)
		rcar_du_plane_set_colorkey(rplane, value);
	else if (property == rgrp->planes.zpos)
		rcar_du_plane_set_zpos(rplane, value);
	else
		return -EINVAL;

	return 0;
}

static const struct drm_plane_funcs rcar_du_plane_funcs = {
	.update_plane = drm_plane_helper_update,
	.disable_plane = drm_plane_helper_disable,
	.reset = drm_atomic_helper_plane_reset,
	.set_property = rcar_du_plane_set_property,
	.destroy = drm_plane_cleanup,
	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};

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;
		plane->alpha = 255;
		plane->colorkey = RCAR_DU_COLORKEY_NONE;
		plane->zpos = type == DRM_PLANE_TYPE_PRIMARY ? 0 : 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
	132	void rcar_du_plane_update_base(struct rcar_du_plane *plane)
	133	{
cb2025d2	134	struct rcar_du_group *rgrp = plane->group;
287bdf03 LP	135	unsigned int src_x = plane->plane.state->src_x >> 16;
287bdf03 LP	136	unsigned int src_y = plane->plane.state->src_y >> 16;
4bf8e196	137	unsigned int index = plane->hwindex;
906eff7f	138	bool interlaced;
eb86301f LP	139	u32 mwr;
eb86301f LP	140
906eff7f LP	141	interlaced = plane->crtc->mode.flags & DRM_MODE_FLAG_INTERLACE;
	142
	143	/* Memory pitch (expressed in pixels). Must be doubled for interlaced
	144	* operation with 32bpp formats.
	145	*/
eb86301f LP	146	if (plane->format->planes == 2)
	147	mwr = plane->pitch;
	148	else
	149	mwr = plane->pitch * 8 / plane->format->bpp;
	150
906eff7f LP	151	if (interlaced && plane->format->bpp == 32)
	152	mwr *= 2;
	153
eb86301f	154	rcar_du_plane_write(rgrp, index, PnMWR, mwr);
4bf8e196	155
9e7db06d LP	156	/* The Y position is expressed in raster line units and must be doubled
	157	* for 32bpp formats, according to the R8A7790 datasheet. No mention of
	158	* doubling the Y position is found in the R8A7779 datasheet, but the
	159	* rule seems to apply there as well.
	160	*
906eff7f LP	161	* Despite not being documented, doubling seem not to be needed when
	162	* operating in interlaced mode.
	163	*
9e7db06d	164	* Similarly, for the second plane, NV12 and NV21 formats seem to
906eff7f LP	165	* require a halved Y position value, in both progressive and interlaced
906eff7f LP	166	* modes.
4bf8e196	167	*/
287bdf03 LP	168	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
287bdf03 LP	169	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
906eff7f	170	(!interlaced && plane->format->bpp == 32 ? 2 : 1));
cb2025d2	171	rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);
4bf8e196 LP	172
	173	if (plane->format->planes == 2) {
	174	index = (index + 1) % 8;
	175
49785e25 LP	176	rcar_du_plane_write(rgrp, index, PnMWR, plane->pitch);
49785e25 LP	177
287bdf03 LP	178	rcar_du_plane_write(rgrp, index, PnSPXR, src_x);
287bdf03 LP	179	rcar_du_plane_write(rgrp, index, PnSPYR, src_y *
4bf8e196	180	(plane->format->bpp == 16 ? 2 : 1) / 2);
cb2025d2	181	rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[1]);
4bf8e196 LP	182	}
	183	}
	184
	185	void rcar_du_plane_compute_base(struct rcar_du_plane *plane,
	186	struct drm_framebuffer *fb)
	187	{
	188	struct drm_gem_cma_object *gem;
	189
eb86301f LP	190	plane->pitch = fb->pitches[0];
eb86301f LP	191
4bf8e196 LP	192	gem = drm_fb_cma_get_gem_obj(fb, 0);
	193	plane->dma[0] = gem->paddr + fb->offsets[0];
	194
	195	if (plane->format->planes == 2) {
	196	gem = drm_fb_cma_get_gem_obj(fb, 1);
	197	plane->dma[1] = gem->paddr + fb->offsets[1];
	198	}
	199	}
	200
	201	static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
	202	unsigned int index)
	203	{
cb2025d2	204	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	205	u32 colorkey;
	206	u32 pnmr;
	207
	208	/* The PnALPHAR register controls alpha-blending in 16bpp formats
	209	* (ARGB1555 and XRGB1555).
	210	*
	211	* For ARGB, set the alpha value to 0, and enable alpha-blending when
	212	* the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
	213	*
	214	* For XRGB, set the alpha value to the plane-wide alpha value and
	215	* enable alpha-blending regardless of the X bit value.
	216	*/
	217	if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
cb2025d2	218	rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
4bf8e196	219	else
cb2025d2	220	rcar_du_plane_write(rgrp, index, PnALPHAR,
4bf8e196 LP	221	PnALPHAR_ABIT_X \| plane->alpha);
	222
	223	pnmr = PnMR_BM_MD \| plane->format->pnmr;
	224
	225	/* Disable color keying when requested. YUV formats have the
	226	* PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
	227	* automatically.
	228	*/
	229	if ((plane->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
	230	pnmr \|= PnMR_SPIM_TP_OFF;
	231
	232	/* For packed YUV formats we need to select the U/V order. */
	233	if (plane->format->fourcc == DRM_FORMAT_YUYV)
	234	pnmr \|= PnMR_YCDF_YUYV;
	235
cb2025d2	236	rcar_du_plane_write(rgrp, index, PnMR, pnmr);
4bf8e196 LP	237
	238	switch (plane->format->fourcc) {
	239	case DRM_FORMAT_RGB565:
	240	colorkey = ((plane->colorkey & 0xf80000) >> 8)
	241	\| ((plane->colorkey & 0x00fc00) >> 5)
	242	\| ((plane->colorkey & 0x0000f8) >> 3);
cb2025d2	243	rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
4bf8e196 LP	244	break;
	245
	246	case DRM_FORMAT_ARGB1555:
	247	case DRM_FORMAT_XRGB1555:
	248	colorkey = ((plane->colorkey & 0xf80000) >> 9)
	249	\| ((plane->colorkey & 0x00f800) >> 6)
	250	\| ((plane->colorkey & 0x0000f8) >> 3);
cb2025d2	251	rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
4bf8e196 LP	252	break;
	253
	254	case DRM_FORMAT_XRGB8888:
	255	case DRM_FORMAT_ARGB8888:
cb2025d2	256	rcar_du_plane_write(rgrp, index, PnTC3R,
4bf8e196 LP	257	PnTC3R_CODE \| (plane->colorkey & 0xffffff));
	258	break;
	259	}
	260	}
	261
	262	static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
	263	unsigned int index)
	264	{
cb2025d2	265	struct rcar_du_group *rgrp = plane->group;
4bf8e196 LP	266	u32 ddcr2 = PnDDCR2_CODE;
4bf8e196 LP	267	u32 ddcr4;
4bf8e196 LP	268
	269	/* Data format
	270	*
	271	* The data format is selected by the DDDF field in PnMR and the EDF
	272	* field in DDCR4.
	273	*/
cb2025d2	274	ddcr4 = rcar_du_plane_read(rgrp, index, PnDDCR4);
4bf8e196 LP	275	ddcr4 &= ~PnDDCR4_EDF_MASK;
	276	ddcr4 \|= plane->format->edf \| PnDDCR4_CODE;
	277
	278	rcar_du_plane_setup_mode(plane, index);
	279
	280	if (plane->format->planes == 2) {
	281	if (plane->hwindex != index) {
	282	if (plane->format->fourcc == DRM_FORMAT_NV12 \|\|
	283	plane->format->fourcc == DRM_FORMAT_NV21)
	284	ddcr2 \|= PnDDCR2_Y420;
	285
	286	if (plane->format->fourcc == DRM_FORMAT_NV21)
	287	ddcr2 \|= PnDDCR2_NV21;
	288
	289	ddcr2 \|= PnDDCR2_DIVU;
	290	} else {
	291	ddcr2 \|= PnDDCR2_DIVY;
	292	}
	293	}
	294
cb2025d2 LP	295	rcar_du_plane_write(rgrp, index, PnDDCR2, ddcr2);
cb2025d2 LP	296	rcar_du_plane_write(rgrp, index, PnDDCR4, ddcr4);
4bf8e196	297
4bf8e196	298	/* Destination position and size */
287bdf03 LP	299	rcar_du_plane_write(rgrp, index, PnDSXR, plane->plane.state->crtc_w);
	300	rcar_du_plane_write(rgrp, index, PnDSYR, plane->plane.state->crtc_h);
	301	rcar_du_plane_write(rgrp, index, PnDPXR, plane->plane.state->crtc_x);
	302	rcar_du_plane_write(rgrp, index, PnDPYR, plane->plane.state->crtc_y);
4bf8e196 LP	303
4bf8e196 LP	304	/* Wrap-around and blinking, disabled */
cb2025d2 LP	305	rcar_du_plane_write(rgrp, index, PnWASPR, 0);
	306	rcar_du_plane_write(rgrp, index, PnWAMWR, 4095);
	307	rcar_du_plane_write(rgrp, index, PnBTR, 0);
	308	rcar_du_plane_write(rgrp, index, PnMLR, 0);
4bf8e196 LP	309	}
	310
	311	void rcar_du_plane_setup(struct rcar_du_plane *plane)
	312	{
	313	__rcar_du_plane_setup(plane, plane->hwindex);
	314	if (plane->format->planes == 2)
	315	__rcar_du_plane_setup(plane, (plane->hwindex + 1) % 8);
	316
	317	rcar_du_plane_update_base(plane);
	318	}
	319
920888a2 LP	320	static int rcar_du_plane_atomic_check(struct drm_plane *plane,
920888a2 LP	321	struct drm_plane_state *state)
4bf8e196 LP	322	{
4bf8e196 LP	323	struct rcar_du_plane *rplane = to_rcar_plane(plane);
cb2025d2	324	struct rcar_du_device *rcdu = rplane->group->dev;
4bf8e196 LP	325	const struct rcar_du_format_info *format;
	326	unsigned int nplanes;
	327	int ret;
	328
920888a2 LP	329	if (!state->fb \|\| !state->crtc)
920888a2 LP	330	return 0;
917de180	331
920888a2 LP	332	if (state->src_w >> 16 != state->crtc_w \|\|
	333	state->src_h >> 16 != state->crtc_h) {
	334	dev_dbg(rcdu->dev, "%s: scaling not supported\n", __func__);
4bf8e196 LP	335	return -EINVAL;
	336	}
	337
920888a2 LP	338	format = rcar_du_format_info(state->fb->pixel_format);
	339	if (format == NULL) {
	340	dev_dbg(rcdu->dev, "%s: unsupported format %08x\n", __func__,
	341	state->fb->pixel_format);
4bf8e196 LP	342	return -EINVAL;
	343	}
	344
	345	nplanes = rplane->format ? rplane->format->planes : 0;
	346
920888a2 LP	347	/* If the number of required planes has changed we will need to
920888a2 LP	348	* reallocate hardware planes. Ensure free planes are available.
4bf8e196 LP	349	*/
4bf8e196 LP	350	if (format->planes != nplanes) {
920888a2 LP	351	ret = rcar_du_plane_reserve_check(rplane, format);
	352	if (ret < 0) {
	353	dev_dbg(rcdu->dev, "%s: no available hardware plane\n",
	354	__func__);
4bf8e196	355	return ret;
920888a2	356	}
4bf8e196 LP	357	}
4bf8e196 LP	358
4bf8e196 LP	359	return 0;
	360	}
	361
920888a2	362	static void rcar_du_plane_disable(struct rcar_du_plane *rplane)
4bf8e196	363	{
4bf8e196	364	if (!rplane->enabled)
920888a2	365	return;
4bf8e196	366
cb2025d2	367	mutex_lock(&rplane->group->planes.lock);
4bf8e196	368	rplane->enabled = false;
cb2025d2	369	mutex_unlock(&rplane->group->planes.lock);
4bf8e196 LP	370
	371	rcar_du_plane_release(rplane);
	372
	373	rplane->crtc = NULL;
	374	rplane->format = NULL;
920888a2	375	}
4bf8e196	376
920888a2 LP	377	static void rcar_du_plane_atomic_update(struct drm_plane *plane,
	378	struct drm_plane_state *old_state)
	379	{
	380	struct rcar_du_plane *rplane = to_rcar_plane(plane);
	381	struct drm_plane_state *state = plane->state;
	382	const struct rcar_du_format_info *format;
	383	unsigned int nplanes;
	384
	385	if (!state->crtc) {
	386	rcar_du_plane_disable(rplane);
	387	return;
	388	}
	389
	390	format = rcar_du_format_info(state->fb->pixel_format);
	391	nplanes = rplane->format ? rplane->format->planes : 0;
	392
	393	/* Reallocate hardware planes if the number of required planes has
	394	* changed.
	395	*/
	396	if (format->planes != nplanes) {
	397	rcar_du_plane_release(rplane);
	398	rcar_du_plane_reserve(rplane, format);
	399	}
	400
	401	rplane->crtc = state->crtc;
	402	rplane->format = format;
	403
920888a2 LP	404	rcar_du_plane_compute_base(rplane, state->fb);
	405	rcar_du_plane_setup(rplane);
	406
	407	mutex_lock(&rplane->group->planes.lock);
	408	rplane->enabled = true;
920888a2	409	mutex_unlock(&rplane->group->planes.lock);
4bf8e196 LP	410	}
4bf8e196 LP	411
920888a2 LP	412	static const struct drm_plane_helper_funcs rcar_du_plane_helper_funcs = {
	413	.atomic_check = rcar_du_plane_atomic_check,
	414	.atomic_update = rcar_du_plane_atomic_update,
	415	};
	416
4bf8e196 LP	417	/* Both the .set_property and the .update_plane operations are called with the
	418	* mode_config lock held. There is this no need to explicitly protect access to
	419	* the alpha and colorkey fields and the mode register.
	420	*/
	421	static void rcar_du_plane_set_alpha(struct rcar_du_plane *plane, u32 alpha)
	422	{
	423	if (plane->alpha == alpha)
	424	return;
	425
	426	plane->alpha = alpha;
	427	if (!plane->enabled \|\| plane->format->fourcc != DRM_FORMAT_XRGB1555)
	428	return;
	429
	430	rcar_du_plane_setup_mode(plane, plane->hwindex);
	431	}
	432
	433	static void rcar_du_plane_set_colorkey(struct rcar_du_plane *plane,
	434	u32 colorkey)
	435	{
	436	if (plane->colorkey == colorkey)
	437	return;
	438
	439	plane->colorkey = colorkey;
	440	if (!plane->enabled)
	441	return;
	442
	443	rcar_du_plane_setup_mode(plane, plane->hwindex);
	444	}
	445
	446	static void rcar_du_plane_set_zpos(struct rcar_du_plane *plane,
	447	unsigned int zpos)
	448	{
cb2025d2	449	mutex_lock(&plane->group->planes.lock);
4bf8e196 LP	450	if (plane->zpos == zpos)
	451	goto done;
	452
	453	plane->zpos = zpos;
	454	if (!plane->enabled)
	455	goto done;
	456
	457	rcar_du_crtc_update_planes(plane->crtc);
	458
	459	done:
cb2025d2	460	mutex_unlock(&plane->group->planes.lock);
4bf8e196 LP	461	}
	462
	463	static int rcar_du_plane_set_property(struct drm_plane *plane,
	464	struct drm_property *property,
	465	uint64_t value)
	466	{
4bf8e196	467	struct rcar_du_plane *rplane = to_rcar_plane(plane);
cb2025d2	468	struct rcar_du_group *rgrp = rplane->group;
4bf8e196	469
cb2025d2	470	if (property == rgrp->planes.alpha)
4bf8e196	471	rcar_du_plane_set_alpha(rplane, value);
cb2025d2	472	else if (property == rgrp->planes.colorkey)
4bf8e196	473	rcar_du_plane_set_colorkey(rplane, value);
cb2025d2	474	else if (property == rgrp->planes.zpos)
4bf8e196 LP	475	rcar_du_plane_set_zpos(rplane, value);
	476	else
	477	return -EINVAL;
	478
	479	return 0;
	480	}
	481
	482	static const struct drm_plane_funcs rcar_du_plane_funcs = {
920888a2 LP	483	.update_plane = drm_plane_helper_update,
920888a2 LP	484	.disable_plane = drm_plane_helper_disable,
3e8da87d	485	.reset = drm_atomic_helper_plane_reset,
4bf8e196 LP	486	.set_property = rcar_du_plane_set_property,
4bf8e196 LP	487	.destroy = drm_plane_cleanup,
3e8da87d LP	488	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
3e8da87d LP	489	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
4bf8e196 LP	490	};
	491
	492	static const uint32_t formats[] = {
	493	DRM_FORMAT_RGB565,
	494	DRM_FORMAT_ARGB1555,
	495	DRM_FORMAT_XRGB1555,
	496	DRM_FORMAT_XRGB8888,
	497	DRM_FORMAT_ARGB8888,
	498	DRM_FORMAT_UYVY,
	499	DRM_FORMAT_YUYV,
	500	DRM_FORMAT_NV12,
	501	DRM_FORMAT_NV21,
	502	DRM_FORMAT_NV16,
	503	};
	504
cb2025d2	505	int rcar_du_planes_init(struct rcar_du_group *rgrp)
4bf8e196	506	{
cb2025d2 LP	507	struct rcar_du_planes *planes = &rgrp->planes;
cb2025d2 LP	508	struct rcar_du_device *rcdu = rgrp->dev;
917de180 LP	509	unsigned int num_planes;
	510	unsigned int num_crtcs;
	511	unsigned int crtcs;
4bf8e196	512	unsigned int i;
917de180	513	int ret;
4bf8e196	514
cb2025d2 LP	515	mutex_init(&planes->lock);
cb2025d2 LP	516	planes->free = 0xff;
4bf8e196	517
cb2025d2	518	planes->alpha =
4bf8e196	519	drm_property_create_range(rcdu->ddev, 0, "alpha", 0, 255);
cb2025d2	520	if (planes->alpha == NULL)
4bf8e196 LP	521	return -ENOMEM;
	522
	523	/* The color key is expressed as an RGB888 triplet stored in a 32-bit
	524	* integer in XRGB8888 format. Bit 24 is used as a flag to disable (0)
	525	* or enable source color keying (1).
	526	*/
cb2025d2	527	planes->colorkey =
4bf8e196 LP	528	drm_property_create_range(rcdu->ddev, 0, "colorkey",
4bf8e196 LP	529	0, 0x01ffffff);
cb2025d2	530	if (planes->colorkey == NULL)
4bf8e196 LP	531	return -ENOMEM;
4bf8e196 LP	532
cb2025d2	533	planes->zpos =
4bf8e196	534	drm_property_create_range(rcdu->ddev, 0, "zpos", 1, 7);
cb2025d2	535	if (planes->zpos == NULL)
4bf8e196 LP	536	return -ENOMEM;
4bf8e196 LP	537
917de180 LP	538	/* Create one primary plane per in this group CRTC and seven overlay
	539	* planes.
	540	*/
	541	num_crtcs = min(rcdu->num_crtcs - 2 * rgrp->index, 2U);
	542	num_planes = num_crtcs + 7;
	543
	544	crtcs = ((1 << rcdu->num_crtcs) - 1) & (3 << (2 * rgrp->index));
	545
	546	for (i = 0; i < num_planes; ++i) {
	547	enum drm_plane_type type = i < num_crtcs
	548	? DRM_PLANE_TYPE_PRIMARY
	549	: DRM_PLANE_TYPE_OVERLAY;
cb2025d2	550	struct rcar_du_plane *plane = &planes->planes[i];
4bf8e196	551
cb2025d2	552	plane->group = rgrp;
4bf8e196 LP	553	plane->hwindex = -1;
	554	plane->alpha = 255;
	555	plane->colorkey = RCAR_DU_COLORKEY_NONE;
917de180	556	plane->zpos = type == DRM_PLANE_TYPE_PRIMARY ? 0 : 1;
4bf8e196	557
917de180 LP	558	ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
	559	&rcar_du_plane_funcs, formats,
	560	ARRAY_SIZE(formats), type);
4bf8e196 LP	561	if (ret < 0)
	562	return ret;
	563
920888a2 LP	564	drm_plane_helper_add(&plane->plane,
	565	&rcar_du_plane_helper_funcs);
	566
917de180 LP	567	if (type == DRM_PLANE_TYPE_PRIMARY)
	568	continue;
	569
4bf8e196	570	drm_object_attach_property(&plane->plane.base,
cb2025d2	571	planes->alpha, 255);
4bf8e196	572	drm_object_attach_property(&plane->plane.base,
cb2025d2	573	planes->colorkey,
4bf8e196 LP	574	RCAR_DU_COLORKEY_NONE);
4bf8e196 LP	575	drm_object_attach_property(&plane->plane.base,
cb2025d2	576	planes->zpos, 1);
4bf8e196 LP	577	}
	578
	579	return 0;
	580	}