drivers/gpu/drm/exynos/exynos_drm_plane.c - maze/linux - Git at Google

 /*
  * Copyright (C) 2011 Samsung Electronics Co.Ltd
  * Authors: Joonyoung Shim <jy0922.shim@samsung.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/exynos_drm.h>
 #include "exynos_drm_drv.h"
 #include "exynos_drm_crtc.h"
 #include "exynos_drm_fb.h"
 #include "exynos_drm_gem.h"
 #include "exynos_drm_plane.h"

 #define to_exynos_plane(x)	container_of(x, struct exynos_plane, base)

 struct exynos_plane {
 	struct drm_plane		base;
 	struct exynos_drm_overlay	overlay;
 	bool				enabled;
 };

 static const uint32_t formats[] = {
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_NV12,
 	DRM_FORMAT_NV12MT,
 };

 /*
  * This function is to get X or Y size shown via screen. This needs length and
  * start position of CRTC.
  *
  *      <--- length --->
  * CRTC ----------------
  *      ^ start        ^ end
  *
  * There are six cases from a to f.
  *
  *             <----- SCREEN ----->
  *             0                 last
  *   ----------|------------------|----------
  * CRTCs
  * a -------
  *        b -------
  *        c --------------------------
  *                 d --------
  *                           e -------
  *                                  f -------
  */
 static int exynos_plane_get_size(int start, unsigned length, unsigned last)
 {
 	int end = start + length;
 	int size = 0;

 	if (start <= 0) {
 		if (end > 0)
 			size = min_t(unsigned, end, last);
 	} else if (start <= last) {
 		size = min_t(unsigned, last - start, length);
 	}

 	return size;
 }

 int exynos_plane_mode_set(struct drm_plane *plane, struct drm_crtc *crtc,
 			  struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 			  unsigned int crtc_w, unsigned int crtc_h,
 			  uint32_t src_x, uint32_t src_y,
 			  uint32_t src_w, uint32_t src_h)
 {
 	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
 	unsigned int actual_w;
 	unsigned int actual_h;
 	int nr;
 	int i;

 	nr = exynos_drm_fb_get_buf_cnt(fb);
 	for (i = 0; i < nr; i++) {
 		struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);

 		if (!buffer) {
 			DRM_DEBUG_KMS("buffer is null\n");
 			return -EFAULT;
 		}

 		overlay->dma_addr[i] = buffer->dma_addr;

 		DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
 				i, (unsigned long)overlay->dma_addr[i]);
 	}

 	actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
 	actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);

 	if (crtc_x < 0) {
 		if (actual_w)
 			src_x -= crtc_x;
 		crtc_x = 0;
 	}

 	if (crtc_y < 0) {
 		if (actual_h)
 			src_y -= crtc_y;
 		crtc_y = 0;
 	}

 	/* set drm framebuffer data. */
 	overlay->fb_x = src_x;
 	overlay->fb_y = src_y;
 	overlay->fb_width = fb->width;
 	overlay->fb_height = fb->height;
 	overlay->src_width = src_w;
 	overlay->src_height = src_h;
 	overlay->bpp = fb->bits_per_pixel;
 	overlay->pitch = fb->pitches[0];
 	overlay->pixel_format = fb->pixel_format;

 	/* set overlay range to be displayed. */
 	overlay->crtc_x = crtc_x;
 	overlay->crtc_y = crtc_y;
 	overlay->crtc_width = actual_w;
 	overlay->crtc_height = actual_h;

 	/* set drm mode data. */
 	overlay->mode_width = crtc->mode.hdisplay;
 	overlay->mode_height = crtc->mode.vdisplay;
 	overlay->refresh = crtc->mode.vrefresh;
 	overlay->scan_flag = crtc->mode.flags;

 	DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
 			overlay->crtc_x, overlay->crtc_y,
 			overlay->crtc_width, overlay->crtc_height);

 	exynos_drm_crtc_plane_mode_set(crtc, overlay);

 	return 0;
 }

 void exynos_plane_commit(struct drm_plane *plane)
 {
 	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;

 	exynos_drm_crtc_plane_commit(plane->crtc, overlay->zpos);
 }

 void exynos_plane_dpms(struct drm_plane *plane, int mode)
 {
 	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;

 	if (mode == DRM_MODE_DPMS_ON) {
 		if (exynos_plane->enabled)
 			return;

 		exynos_drm_crtc_plane_enable(plane->crtc, overlay->zpos);
 		exynos_plane->enabled = true;
 	} else {
 		if (!exynos_plane->enabled)
 			return;

 		exynos_drm_crtc_plane_disable(plane->crtc, overlay->zpos);
 		exynos_plane->enabled = false;
 	}
 }

 static int
 exynos_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		     struct drm_framebuffer *fb, int crtc_x, int crtc_y,
 		     unsigned int crtc_w, unsigned int crtc_h,
 		     uint32_t src_x, uint32_t src_y,
 		     uint32_t src_w, uint32_t src_h)
 {
 	int ret;

 	ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
 			crtc_w, crtc_h, src_x >> 16, src_y >> 16,
 			src_w >> 16, src_h >> 16);
 	if (ret < 0)
 		return ret;

 	plane->crtc = crtc;

 	exynos_plane_commit(plane);
 	exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);

 	return 0;
 }

 static int exynos_disable_plane(struct drm_plane *plane)
 {
 	exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);

 	return 0;
 }

 static void exynos_plane_destroy(struct drm_plane *plane)
 {
 	struct exynos_plane *exynos_plane = to_exynos_plane(plane);

 	exynos_disable_plane(plane);
 	drm_plane_cleanup(plane);
 	kfree(exynos_plane);
 }

 static int exynos_plane_set_property(struct drm_plane *plane,
 				     struct drm_property *property,
 				     uint64_t val)
 {
 	struct drm_device *dev = plane->dev;
 	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
 	struct exynos_drm_private *dev_priv = dev->dev_private;

 	if (property == dev_priv->plane_zpos_property) {
 		exynos_plane->overlay.zpos = val;
 		return 0;
 	}

 	return -EINVAL;
 }

 static struct drm_plane_funcs exynos_plane_funcs = {
 	.update_plane	= exynos_update_plane,
 	.disable_plane	= exynos_disable_plane,
 	.destroy	= exynos_plane_destroy,
 	.set_property	= exynos_plane_set_property,
 };

 static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
 {
 	struct drm_device *dev = plane->dev;
 	struct exynos_drm_private *dev_priv = dev->dev_private;
 	struct drm_property *prop;

 	prop = dev_priv->plane_zpos_property;
 	if (!prop) {
 		prop = drm_property_create_range(dev, 0, "zpos", 0,
 						 MAX_PLANE - 1);
 		if (!prop)
 			return;

 		dev_priv->plane_zpos_property = prop;
 	}

 	drm_object_attach_property(&plane->base, prop, 0);
 }

 struct drm_plane *exynos_plane_init(struct drm_device *dev,
 				    unsigned long possible_crtcs, bool priv)
 {
 	struct exynos_plane *exynos_plane;
 	int err;

 	exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
 	if (!exynos_plane)
 		return NULL;

 	err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 			      &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
 			      priv);
 	if (err) {
 		DRM_ERROR("failed to initialize plane\n");
 		kfree(exynos_plane);
 		return NULL;
 	}

 	if (priv)
 		exynos_plane->overlay.zpos = DEFAULT_ZPOS;
 	else
 		exynos_plane_attach_zpos_property(&exynos_plane->base);

 	return &exynos_plane->base;
 }
	/*
	* Copyright (C) 2011 Samsung Electronics Co.Ltd
	* Authors: Joonyoung Shim <jy0922.shim@samsung.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/exynos_drm.h>
	#include "exynos_drm_drv.h"
	#include "exynos_drm_crtc.h"
	#include "exynos_drm_fb.h"
	#include "exynos_drm_gem.h"
	#include "exynos_drm_plane.h"

	#define to_exynos_plane(x) container_of(x, struct exynos_plane, base)

	struct exynos_plane {
	struct drm_plane base;
	struct exynos_drm_overlay overlay;
	bool enabled;
	};

	static const uint32_t formats[] = {
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_NV12,
	DRM_FORMAT_NV12MT,
	};

	/*
	* This function is to get X or Y size shown via screen. This needs length and
	* start position of CRTC.
	*
	* <--- length --->
	* CRTC ----------------
	* ^ start ^ end
	*
	* There are six cases from a to f.
	*
	* <----- SCREEN ----->
	* 0 last
	* ----------\|------------------\|----------
	* CRTCs
	* a -------
	* b -------
	* c --------------------------
	* d --------
	* e -------
	* f -------
	*/
	static int exynos_plane_get_size(int start, unsigned length, unsigned last)
	{
	int end = start + length;
	int size = 0;

	if (start <= 0) {
	if (end > 0)
	size = min_t(unsigned, end, last);
	} else if (start <= last) {
	size = min_t(unsigned, last - start, length);
	}

	return size;
	}

	int exynos_plane_mode_set(struct drm_plane plane, struct drm_crtc crtc,
	struct drm_framebuffer *fb, int crtc_x, int crtc_y,
	unsigned int crtc_w, unsigned int crtc_h,
	uint32_t src_x, uint32_t src_y,
	uint32_t src_w, uint32_t src_h)
	{
	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;
	unsigned int actual_w;
	unsigned int actual_h;
	int nr;
	int i;

	nr = exynos_drm_fb_get_buf_cnt(fb);
	for (i = 0; i < nr; i++) {
	struct exynos_drm_gem_buf *buffer = exynos_drm_fb_buffer(fb, i);

	if (!buffer) {
	DRM_DEBUG_KMS("buffer is null\n");
	return -EFAULT;
	}

	overlay->dma_addr[i] = buffer->dma_addr;

	DRM_DEBUG_KMS("buffer: %d, dma_addr = 0x%lx\n",
	i, (unsigned long)overlay->dma_addr[i]);
	}

	actual_w = exynos_plane_get_size(crtc_x, crtc_w, crtc->mode.hdisplay);
	actual_h = exynos_plane_get_size(crtc_y, crtc_h, crtc->mode.vdisplay);

	if (crtc_x < 0) {
	if (actual_w)
	src_x -= crtc_x;
	crtc_x = 0;
	}

	if (crtc_y < 0) {
	if (actual_h)
	src_y -= crtc_y;
	crtc_y = 0;
	}

	/* set drm framebuffer data. */
	overlay->fb_x = src_x;
	overlay->fb_y = src_y;
	overlay->fb_width = fb->width;
	overlay->fb_height = fb->height;
	overlay->src_width = src_w;
	overlay->src_height = src_h;
	overlay->bpp = fb->bits_per_pixel;
	overlay->pitch = fb->pitches[0];
	overlay->pixel_format = fb->pixel_format;

	/* set overlay range to be displayed. */
	overlay->crtc_x = crtc_x;
	overlay->crtc_y = crtc_y;
	overlay->crtc_width = actual_w;
	overlay->crtc_height = actual_h;

	/* set drm mode data. */
	overlay->mode_width = crtc->mode.hdisplay;
	overlay->mode_height = crtc->mode.vdisplay;
	overlay->refresh = crtc->mode.vrefresh;
	overlay->scan_flag = crtc->mode.flags;

	DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
	overlay->crtc_x, overlay->crtc_y,
	overlay->crtc_width, overlay->crtc_height);

	exynos_drm_crtc_plane_mode_set(crtc, overlay);

	return 0;
	}

	void exynos_plane_commit(struct drm_plane *plane)
	{
	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;

	exynos_drm_crtc_plane_commit(plane->crtc, overlay->zpos);
	}

	void exynos_plane_dpms(struct drm_plane *plane, int mode)
	{
	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
	struct exynos_drm_overlay *overlay = &exynos_plane->overlay;

	if (mode == DRM_MODE_DPMS_ON) {
	if (exynos_plane->enabled)
	return;

	exynos_drm_crtc_plane_enable(plane->crtc, overlay->zpos);
	exynos_plane->enabled = true;
	} else {
	if (!exynos_plane->enabled)
	return;

	exynos_drm_crtc_plane_disable(plane->crtc, overlay->zpos);
	exynos_plane->enabled = false;
	}
	}

	static int
	exynos_update_plane(struct drm_plane plane, struct drm_crtc crtc,
	struct drm_framebuffer *fb, int crtc_x, int crtc_y,
	unsigned int crtc_w, unsigned int crtc_h,
	uint32_t src_x, uint32_t src_y,
	uint32_t src_w, uint32_t src_h)
	{
	int ret;

	ret = exynos_plane_mode_set(plane, crtc, fb, crtc_x, crtc_y,
	crtc_w, crtc_h, src_x >> 16, src_y >> 16,
	src_w >> 16, src_h >> 16);
	if (ret < 0)
	return ret;

	plane->crtc = crtc;

	exynos_plane_commit(plane);
	exynos_plane_dpms(plane, DRM_MODE_DPMS_ON);

	return 0;
	}

	static int exynos_disable_plane(struct drm_plane *plane)
	{
	exynos_plane_dpms(plane, DRM_MODE_DPMS_OFF);

	return 0;
	}

	static void exynos_plane_destroy(struct drm_plane *plane)
	{
	struct exynos_plane *exynos_plane = to_exynos_plane(plane);

	exynos_disable_plane(plane);
	drm_plane_cleanup(plane);
	kfree(exynos_plane);
	}

	static int exynos_plane_set_property(struct drm_plane *plane,
	struct drm_property *property,
	uint64_t val)
	{
	struct drm_device *dev = plane->dev;
	struct exynos_plane *exynos_plane = to_exynos_plane(plane);
	struct exynos_drm_private *dev_priv = dev->dev_private;

	if (property == dev_priv->plane_zpos_property) {
	exynos_plane->overlay.zpos = val;
	return 0;
	}

	return -EINVAL;
	}

	static struct drm_plane_funcs exynos_plane_funcs = {
	.update_plane = exynos_update_plane,
	.disable_plane = exynos_disable_plane,
	.destroy = exynos_plane_destroy,
	.set_property = exynos_plane_set_property,
	};

	static void exynos_plane_attach_zpos_property(struct drm_plane *plane)
	{
	struct drm_device *dev = plane->dev;
	struct exynos_drm_private *dev_priv = dev->dev_private;
	struct drm_property *prop;

	prop = dev_priv->plane_zpos_property;
	if (!prop) {
	prop = drm_property_create_range(dev, 0, "zpos", 0,
	MAX_PLANE - 1);
	if (!prop)
	return;

	dev_priv->plane_zpos_property = prop;
	}

	drm_object_attach_property(&plane->base, prop, 0);
	}

	struct drm_plane exynos_plane_init(struct drm_device dev,
	unsigned long possible_crtcs, bool priv)
	{
	struct exynos_plane *exynos_plane;
	int err;

	exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
	if (!exynos_plane)
	return NULL;

	err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
	&exynos_plane_funcs, formats, ARRAY_SIZE(formats),
	priv);
	if (err) {
	DRM_ERROR("failed to initialize plane\n");
	kfree(exynos_plane);
	return NULL;
	}

	if (priv)
	exynos_plane->overlay.zpos = DEFAULT_ZPOS;
	else
	exynos_plane_attach_zpos_property(&exynos_plane->base);

	return &exynos_plane->base;
	}