drivers/gpu/drm/rcar-du/rcar_du_kms.c - arm/linux - Git at Google

 /*
  * rcar_du_kms.c  --  R-Car Display Unit Mode Setting
  *
  * Copyright (C) 2013 Renesas 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_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>

 #include "rcar_du_crtc.h"
 #include "rcar_du_drv.h"
 #include "rcar_du_encoder.h"
 #include "rcar_du_kms.h"
 #include "rcar_du_lvdsenc.h"
 #include "rcar_du_regs.h"

 /* -----------------------------------------------------------------------------
  * Format helpers
  */

 static const struct rcar_du_format_info rcar_du_format_infos[] = {
 	{
 		.fourcc = DRM_FORMAT_RGB565,
 		.bpp = 16,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_ARGB1555,
 		.bpp = 16,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_XRGB1555,
 		.bpp = 16,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_ALP | PnMR_DDDF_ARGB,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_XRGB8888,
 		.bpp = 32,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_TP | PnMR_DDDF_16BPP,
 		.edf = PnDDCR4_EDF_RGB888,
 	}, {
 		.fourcc = DRM_FORMAT_ARGB8888,
 		.bpp = 32,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_ALP | PnMR_DDDF_16BPP,
 		.edf = PnDDCR4_EDF_ARGB8888,
 	}, {
 		.fourcc = DRM_FORMAT_UYVY,
 		.bpp = 16,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_YUYV,
 		.bpp = 16,
 		.planes = 1,
 		.pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_NV12,
 		.bpp = 12,
 		.planes = 2,
 		.pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		.fourcc = DRM_FORMAT_NV21,
 		.bpp = 12,
 		.planes = 2,
 		.pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
 		.edf = PnDDCR4_EDF_NONE,
 	}, {
 		/* In YUV 4:2:2, only NV16 is supported (NV61 isn't) */
 		.fourcc = DRM_FORMAT_NV16,
 		.bpp = 16,
 		.planes = 2,
 		.pnmr = PnMR_SPIM_TP_OFF | PnMR_DDDF_YC,
 		.edf = PnDDCR4_EDF_NONE,
 	},
 };

 const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
 {
 	unsigned int i;

 	for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) {
 		if (rcar_du_format_infos[i].fourcc == fourcc)
 			return &rcar_du_format_infos[i];
 	}

 	return NULL;
 }

 /* -----------------------------------------------------------------------------
  * Frame buffer
  */

 int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev,
 			struct drm_mode_create_dumb *args)
 {
 	struct rcar_du_device *rcdu = dev->dev_private;
 	unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
 	unsigned int align;

 	/* The R8A7779 DU requires a 16 pixels pitch alignment as documented,
 	 * but the R8A7790 DU seems to require a 128 bytes pitch alignment.
 	 */
 	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_ALIGN_128B))
 		align = 128;
 	else
 		align = 16 * args->bpp / 8;

 	args->pitch = roundup(max(args->pitch, min_pitch), align);

 	return drm_gem_cma_dumb_create(file, dev, args);
 }

 static struct drm_framebuffer *
 rcar_du_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 		  struct drm_mode_fb_cmd2 *mode_cmd)
 {
 	struct rcar_du_device *rcdu = dev->dev_private;
 	const struct rcar_du_format_info *format;
 	unsigned int align;

 	format = rcar_du_format_info(mode_cmd->pixel_format);
 	if (format == NULL) {
 		dev_dbg(dev->dev, "unsupported pixel format %08x\n",
 			mode_cmd->pixel_format);
 		return ERR_PTR(-EINVAL);
 	}

 	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_ALIGN_128B))
 		align = 128;
 	else
 		align = 16 * format->bpp / 8;

 	if (mode_cmd->pitches[0] & (align - 1) ||
 	    mode_cmd->pitches[0] >= 8192) {
 		dev_dbg(dev->dev, "invalid pitch value %u\n",
 			mode_cmd->pitches[0]);
 		return ERR_PTR(-EINVAL);
 	}

 	if (format->planes == 2) {
 		if (mode_cmd->pitches[1] != mode_cmd->pitches[0]) {
 			dev_dbg(dev->dev,
 				"luma and chroma pitches do not match\n");
 			return ERR_PTR(-EINVAL);
 		}
 	}

 	return drm_fb_cma_create(dev, file_priv, mode_cmd);
 }

 static void rcar_du_output_poll_changed(struct drm_device *dev)
 {
 	struct rcar_du_device *rcdu = dev->dev_private;

 	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
 }

 static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
 	.fb_create = rcar_du_fb_create,
 	.output_poll_changed = rcar_du_output_poll_changed,
 };

 int rcar_du_modeset_init(struct rcar_du_device *rcdu)
 {
 	static const unsigned int mmio_offsets[] = {
 		DU0_REG_OFFSET, DU2_REG_OFFSET
 	};

 	struct drm_device *dev = rcdu->ddev;
 	struct drm_encoder *encoder;
 	struct drm_fbdev_cma *fbdev;
 	unsigned int num_groups;
 	unsigned int i;
 	int ret;

 	drm_mode_config_init(dev);

 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 	dev->mode_config.max_width = 4095;
 	dev->mode_config.max_height = 2047;
 	dev->mode_config.funcs = &rcar_du_mode_config_funcs;

 	rcdu->num_crtcs = rcdu->info->num_crtcs;

 	/* Initialize the groups. */
 	num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2);

 	for (i = 0; i < num_groups; ++i) {
 		struct rcar_du_group *rgrp = &rcdu->groups[i];

 		rgrp->dev = rcdu;
 		rgrp->mmio_offset = mmio_offsets[i];
 		rgrp->index = i;

 		ret = rcar_du_planes_init(rgrp);
 		if (ret < 0)
 			return ret;
 	}

 	/* Create the CRTCs. */
 	for (i = 0; i < rcdu->num_crtcs; ++i) {
 		struct rcar_du_group *rgrp = &rcdu->groups[i / 2];

 		ret = rcar_du_crtc_create(rgrp, i);
 		if (ret < 0)
 			return ret;
 	}

 	/* Initialize the encoders. */
 	ret = rcar_du_lvdsenc_init(rcdu);
 	if (ret < 0)
 		return ret;

 	for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
 		const struct rcar_du_encoder_data *pdata =
 			&rcdu->pdata->encoders[i];
 		const struct rcar_du_output_routing *route =
 			&rcdu->info->routes[pdata->output];

 		if (pdata->type == RCAR_DU_ENCODER_UNUSED)
 			continue;

 		if (pdata->output >= RCAR_DU_OUTPUT_MAX ||
 		    route->possible_crtcs == 0) {
 			dev_warn(rcdu->dev,
 				 "encoder %u references unexisting output %u, skipping\n",
 				 i, pdata->output);
 			continue;
 		}

 		rcar_du_encoder_init(rcdu, pdata->type, pdata->output, pdata);
 	}

 	/* Set the possible CRTCs and possible clones. There's always at least
 	 * one way for all encoders to clone each other, set all bits in the
 	 * possible clones field.
 	 */
 	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
 		struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
 		const struct rcar_du_output_routing *route =
 			&rcdu->info->routes[renc->output];

 		encoder->possible_crtcs = route->possible_crtcs;
 		encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1;
 	}

 	/* Now that the CRTCs have been initialized register the planes. */
 	for (i = 0; i < num_groups; ++i) {
 		ret = rcar_du_planes_register(&rcdu->groups[i]);
 		if (ret < 0)
 			return ret;
 	}

 	drm_kms_helper_poll_init(dev);

 	drm_helper_disable_unused_functions(dev);

 	fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
 				   dev->mode_config.num_connector);
 	if (IS_ERR(fbdev))
 		return PTR_ERR(fbdev);

 #ifndef CONFIG_FRAMEBUFFER_CONSOLE
 	drm_fbdev_cma_restore_mode(fbdev);
 #endif

 	rcdu->fbdev = fbdev;

 	return 0;
 }
	/*
	* rcar_du_kms.c -- R-Car Display Unit Mode Setting
	*
	* Copyright (C) 2013 Renesas 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_crtc.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_fb_cma_helper.h>
	#include <drm/drm_gem_cma_helper.h>

	#include "rcar_du_crtc.h"
	#include "rcar_du_drv.h"
	#include "rcar_du_encoder.h"
	#include "rcar_du_kms.h"
	#include "rcar_du_lvdsenc.h"
	#include "rcar_du_regs.h"

	/* -----------------------------------------------------------------------------
	* Format helpers
	*/

	static const struct rcar_du_format_info rcar_du_format_infos[] = {
	{
	.fourcc = DRM_FORMAT_RGB565,
	.bpp = 16,
	.planes = 1,
	.pnmr = PnMR_SPIM_TP \| PnMR_DDDF_16BPP,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_ARGB1555,
	.bpp = 16,
	.planes = 1,
	.pnmr = PnMR_SPIM_ALP \| PnMR_DDDF_ARGB,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_XRGB1555,
	.bpp = 16,
	.planes = 1,
	.pnmr = PnMR_SPIM_ALP \| PnMR_DDDF_ARGB,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_XRGB8888,
	.bpp = 32,
	.planes = 1,
	.pnmr = PnMR_SPIM_TP \| PnMR_DDDF_16BPP,
	.edf = PnDDCR4_EDF_RGB888,
	}, {
	.fourcc = DRM_FORMAT_ARGB8888,
	.bpp = 32,
	.planes = 1,
	.pnmr = PnMR_SPIM_ALP \| PnMR_DDDF_16BPP,
	.edf = PnDDCR4_EDF_ARGB8888,
	}, {
	.fourcc = DRM_FORMAT_UYVY,
	.bpp = 16,
	.planes = 1,
	.pnmr = PnMR_SPIM_TP_OFF \| PnMR_DDDF_YC,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_YUYV,
	.bpp = 16,
	.planes = 1,
	.pnmr = PnMR_SPIM_TP_OFF \| PnMR_DDDF_YC,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_NV12,
	.bpp = 12,
	.planes = 2,
	.pnmr = PnMR_SPIM_TP_OFF \| PnMR_DDDF_YC,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	.fourcc = DRM_FORMAT_NV21,
	.bpp = 12,
	.planes = 2,
	.pnmr = PnMR_SPIM_TP_OFF \| PnMR_DDDF_YC,
	.edf = PnDDCR4_EDF_NONE,
	}, {
	/* In YUV 4:2:2, only NV16 is supported (NV61 isn't) */
	.fourcc = DRM_FORMAT_NV16,
	.bpp = 16,
	.planes = 2,
	.pnmr = PnMR_SPIM_TP_OFF \| PnMR_DDDF_YC,
	.edf = PnDDCR4_EDF_NONE,
	},
	};

	const struct rcar_du_format_info *rcar_du_format_info(u32 fourcc)
	{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(rcar_du_format_infos); ++i) {
	if (rcar_du_format_infos[i].fourcc == fourcc)
	return &rcar_du_format_infos[i];
	}

	return NULL;
	}

	/* -----------------------------------------------------------------------------
	* Frame buffer
	*/

	int rcar_du_dumb_create(struct drm_file file, struct drm_device dev,
	struct drm_mode_create_dumb *args)
	{
	struct rcar_du_device *rcdu = dev->dev_private;
	unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
	unsigned int align;

	/* The R8A7779 DU requires a 16 pixels pitch alignment as documented,
	* but the R8A7790 DU seems to require a 128 bytes pitch alignment.
	*/
	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_ALIGN_128B))
	align = 128;
	else
	align = 16 * args->bpp / 8;

	args->pitch = roundup(max(args->pitch, min_pitch), align);

	return drm_gem_cma_dumb_create(file, dev, args);
	}

	static struct drm_framebuffer *
	rcar_du_fb_create(struct drm_device dev, struct drm_file file_priv,
	struct drm_mode_fb_cmd2 *mode_cmd)
	{
	struct rcar_du_device *rcdu = dev->dev_private;
	const struct rcar_du_format_info *format;
	unsigned int align;

	format = rcar_du_format_info(mode_cmd->pixel_format);
	if (format == NULL) {
	dev_dbg(dev->dev, "unsupported pixel format %08x\n",
	mode_cmd->pixel_format);
	return ERR_PTR(-EINVAL);
	}

	if (rcar_du_has(rcdu, RCAR_DU_FEATURE_ALIGN_128B))
	align = 128;
	else
	align = 16 * format->bpp / 8;

	if (mode_cmd->pitches[0] & (align - 1) \|\|
	mode_cmd->pitches[0] >= 8192) {
	dev_dbg(dev->dev, "invalid pitch value %u\n",
	mode_cmd->pitches[0]);
	return ERR_PTR(-EINVAL);
	}

	if (format->planes == 2) {
	if (mode_cmd->pitches[1] != mode_cmd->pitches[0]) {
	dev_dbg(dev->dev,
	"luma and chroma pitches do not match\n");
	return ERR_PTR(-EINVAL);
	}
	}

	return drm_fb_cma_create(dev, file_priv, mode_cmd);
	}

	static void rcar_du_output_poll_changed(struct drm_device *dev)
	{
	struct rcar_du_device *rcdu = dev->dev_private;

	drm_fbdev_cma_hotplug_event(rcdu->fbdev);
	}

	static const struct drm_mode_config_funcs rcar_du_mode_config_funcs = {
	.fb_create = rcar_du_fb_create,
	.output_poll_changed = rcar_du_output_poll_changed,
	};

	int rcar_du_modeset_init(struct rcar_du_device *rcdu)
	{
	static const unsigned int mmio_offsets[] = {
	DU0_REG_OFFSET, DU2_REG_OFFSET
	};

	struct drm_device *dev = rcdu->ddev;
	struct drm_encoder *encoder;
	struct drm_fbdev_cma *fbdev;
	unsigned int num_groups;
	unsigned int i;
	int ret;

	drm_mode_config_init(dev);

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.max_width = 4095;
	dev->mode_config.max_height = 2047;
	dev->mode_config.funcs = &rcar_du_mode_config_funcs;

	rcdu->num_crtcs = rcdu->info->num_crtcs;

	/* Initialize the groups. */
	num_groups = DIV_ROUND_UP(rcdu->num_crtcs, 2);

	for (i = 0; i < num_groups; ++i) {
	struct rcar_du_group *rgrp = &rcdu->groups[i];

	rgrp->dev = rcdu;
	rgrp->mmio_offset = mmio_offsets[i];
	rgrp->index = i;

	ret = rcar_du_planes_init(rgrp);
	if (ret < 0)
	return ret;
	}

	/* Create the CRTCs. */
	for (i = 0; i < rcdu->num_crtcs; ++i) {
	struct rcar_du_group *rgrp = &rcdu->groups[i / 2];

	ret = rcar_du_crtc_create(rgrp, i);
	if (ret < 0)
	return ret;
	}

	/* Initialize the encoders. */
	ret = rcar_du_lvdsenc_init(rcdu);
	if (ret < 0)
	return ret;

	for (i = 0; i < rcdu->pdata->num_encoders; ++i) {
	const struct rcar_du_encoder_data *pdata =
	&rcdu->pdata->encoders[i];
	const struct rcar_du_output_routing *route =
	&rcdu->info->routes[pdata->output];

	if (pdata->type == RCAR_DU_ENCODER_UNUSED)
	continue;

	if (pdata->output >= RCAR_DU_OUTPUT_MAX \|\|
	route->possible_crtcs == 0) {
	dev_warn(rcdu->dev,
	"encoder %u references unexisting output %u, skipping\n",
	i, pdata->output);
	continue;
	}

	rcar_du_encoder_init(rcdu, pdata->type, pdata->output, pdata);
	}

	/* Set the possible CRTCs and possible clones. There's always at least
	* one way for all encoders to clone each other, set all bits in the
	* possible clones field.
	*/
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
	struct rcar_du_encoder *renc = to_rcar_encoder(encoder);
	const struct rcar_du_output_routing *route =
	&rcdu->info->routes[renc->output];

	encoder->possible_crtcs = route->possible_crtcs;
	encoder->possible_clones = (1 << rcdu->pdata->num_encoders) - 1;
	}

	/* Now that the CRTCs have been initialized register the planes. */
	for (i = 0; i < num_groups; ++i) {
	ret = rcar_du_planes_register(&rcdu->groups[i]);
	if (ret < 0)
	return ret;
	}

	drm_kms_helper_poll_init(dev);

	drm_helper_disable_unused_functions(dev);

	fbdev = drm_fbdev_cma_init(dev, 32, dev->mode_config.num_crtc,
	dev->mode_config.num_connector);
	if (IS_ERR(fbdev))
	return PTR_ERR(fbdev);

	#ifndef CONFIG_FRAMEBUFFER_CONSOLE
	drm_fbdev_cma_restore_mode(fbdev);
	#endif

	rcdu->fbdev = fbdev;

	return 0;
	}