drivers/gpu/drm/tidss/tidss_plane.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
  */

 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_blend.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_fb_dma_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_framebuffer.h>
 #include <drm/drm_gem_atomic_helper.h>

 #include "tidss_crtc.h"
 #include "tidss_dispc.h"
 #include "tidss_drv.h"
 #include "tidss_plane.h"

 /* drm_plane_helper_funcs */

 static int tidss_plane_atomic_check(struct drm_plane *plane,
 				    struct drm_atomic_state *state)
 {
 	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 										 plane);
 	struct drm_device *ddev = plane->dev;
 	struct tidss_device *tidss = to_tidss(ddev);
 	struct tidss_plane *tplane = to_tidss_plane(plane);
 	const struct drm_format_info *finfo;
 	struct drm_crtc_state *crtc_state;
 	u32 hw_plane = tplane->hw_plane_id;
 	u32 hw_videoport;
 	int ret;

 	dev_dbg(ddev->dev, "%s\n", __func__);

 	if (!new_plane_state->crtc) {
 		/*
 		 * The visible field is not reset by the DRM core but only
 		 * updated by drm_atomic_helper_check_plane_state(), set it
 		 * manually.
 		 */
 		new_plane_state->visible = false;
 		return 0;
 	}

 	crtc_state = drm_atomic_get_crtc_state(state,
 					       new_plane_state->crtc);
 	if (IS_ERR(crtc_state))
 		return PTR_ERR(crtc_state);

 	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 						  0,
 						  INT_MAX, true, true);
 	if (ret < 0)
 		return ret;

 	/*
 	 * The HW is only able to start drawing at subpixel boundary
 	 * (the two first checks bellow). At the end of a row the HW
 	 * can only jump integer number of subpixels forward to the
 	 * beginning of the next row. So we can only show picture with
 	 * integer subpixel width (the third check). However, after
 	 * reaching the end of the drawn picture the drawing starts
 	 * again at the absolute memory address where top left corner
 	 * position of the drawn picture is (so there is no need to
 	 * check for odd height).
 	 */

 	finfo = drm_format_info(new_plane_state->fb->format->format);

 	if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
 		dev_dbg(ddev->dev,
 			"%s: x-position %u not divisible subpixel size %u\n",
 			__func__, (new_plane_state->src_x >> 16), finfo->hsub);
 		return -EINVAL;
 	}

 	if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
 		dev_dbg(ddev->dev,
 			"%s: y-position %u not divisible subpixel size %u\n",
 			__func__, (new_plane_state->src_y >> 16), finfo->vsub);
 		return -EINVAL;
 	}

 	if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
 		dev_dbg(ddev->dev,
 			"%s: src width %u not divisible by subpixel size %u\n",
 			 __func__, (new_plane_state->src_w >> 16),
 			 finfo->hsub);
 		return -EINVAL;
 	}

 	if (!new_plane_state->visible)
 		return 0;

 	hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;

 	ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
 				hw_videoport);
 	if (ret)
 		return ret;

 	return 0;
 }

 static void tidss_plane_atomic_update(struct drm_plane *plane,
 				      struct drm_atomic_state *state)
 {
 	struct drm_device *ddev = plane->dev;
 	struct tidss_device *tidss = to_tidss(ddev);
 	struct tidss_plane *tplane = to_tidss_plane(plane);
 	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 									   plane);
 	u32 hw_videoport;

 	dev_dbg(ddev->dev, "%s\n", __func__);

 	if (!new_state->visible) {
 		dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
 		return;
 	}

 	hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;

 	dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
 }

 static void tidss_plane_atomic_enable(struct drm_plane *plane,
 				      struct drm_atomic_state *state)
 {
 	struct drm_device *ddev = plane->dev;
 	struct tidss_device *tidss = to_tidss(ddev);
 	struct tidss_plane *tplane = to_tidss_plane(plane);

 	dev_dbg(ddev->dev, "%s\n", __func__);

 	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
 }

 static void tidss_plane_atomic_disable(struct drm_plane *plane,
 				       struct drm_atomic_state *state)
 {
 	struct drm_device *ddev = plane->dev;
 	struct tidss_device *tidss = to_tidss(ddev);
 	struct tidss_plane *tplane = to_tidss_plane(plane);

 	dev_dbg(ddev->dev, "%s\n", __func__);

 	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
 }

 static void drm_plane_destroy(struct drm_plane *plane)
 {
 	struct tidss_plane *tplane = to_tidss_plane(plane);

 	drm_plane_cleanup(plane);
 	kfree(tplane);
 }

 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
 	.atomic_check = tidss_plane_atomic_check,
 	.atomic_update = tidss_plane_atomic_update,
 	.atomic_enable = tidss_plane_atomic_enable,
 	.atomic_disable = tidss_plane_atomic_disable,
 };

 static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = {
 	.atomic_check = tidss_plane_atomic_check,
 	.atomic_update = tidss_plane_atomic_update,
 	.atomic_enable = tidss_plane_atomic_enable,
 	.atomic_disable = tidss_plane_atomic_disable,
 	.get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
 };

 static const struct drm_plane_funcs tidss_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.reset = drm_atomic_helper_plane_reset,
 	.destroy = drm_plane_destroy,
 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
 };

 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
 				       u32 hw_plane_id, u32 plane_type,
 				       u32 crtc_mask, const u32 *formats,
 				       u32 num_formats)
 {
 	struct tidss_plane *tplane;
 	enum drm_plane_type type;
 	u32 possible_crtcs;
 	u32 num_planes = tidss->feat->num_planes;
 	u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
 			       BIT(DRM_COLOR_YCBCR_BT709));
 	u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
 			    BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
 	u32 default_encoding = DRM_COLOR_YCBCR_BT601;
 	u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
 	u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
 			   BIT(DRM_MODE_BLEND_COVERAGE));
 	int ret;

 	tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
 	if (!tplane)
 		return ERR_PTR(-ENOMEM);

 	tplane->hw_plane_id = hw_plane_id;

 	possible_crtcs = crtc_mask;
 	type = plane_type;

 	ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
 				       possible_crtcs,
 				       &tidss_plane_funcs,
 				       formats, num_formats,
 				       NULL, type, NULL);
 	if (ret < 0)
 		goto err;

 	if (type == DRM_PLANE_TYPE_PRIMARY)
 		drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs);
 	else
 		drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);

 	drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
 				       num_planes - 1);

 	ret = drm_plane_create_color_properties(&tplane->plane,
 						color_encodings,
 						color_ranges,
 						default_encoding,
 						default_range);
 	if (ret)
 		goto err;

 	ret = drm_plane_create_alpha_property(&tplane->plane);
 	if (ret)
 		goto err;

 	ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
 	if (ret)
 		goto err;

 	return tplane;

 err:
 	kfree(tplane);
 	return ERR_PTR(ret);
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
	* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
	*/

	#include <drm/drm_atomic.h>
	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_blend.h>
	#include <drm/drm_crtc.h>
	#include <drm/drm_fb_dma_helper.h>
	#include <drm/drm_fourcc.h>
	#include <drm/drm_framebuffer.h>
	#include <drm/drm_gem_atomic_helper.h>

	#include "tidss_crtc.h"
	#include "tidss_dispc.h"
	#include "tidss_drv.h"
	#include "tidss_plane.h"

	/* drm_plane_helper_funcs */

	static int tidss_plane_atomic_check(struct drm_plane *plane,
	struct drm_atomic_state *state)
	{
	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
	plane);
	struct drm_device *ddev = plane->dev;
	struct tidss_device *tidss = to_tidss(ddev);
	struct tidss_plane *tplane = to_tidss_plane(plane);
	const struct drm_format_info *finfo;
	struct drm_crtc_state *crtc_state;
	u32 hw_plane = tplane->hw_plane_id;
	u32 hw_videoport;
	int ret;

	dev_dbg(ddev->dev, "%s\n", __func__);

	if (!new_plane_state->crtc) {
	/*
	* The visible field is not reset by the DRM core but only
	* updated by drm_atomic_helper_check_plane_state(), set it
	* manually.
	*/
	new_plane_state->visible = false;
	return 0;
	}

	crtc_state = drm_atomic_get_crtc_state(state,
	new_plane_state->crtc);
	if (IS_ERR(crtc_state))
	return PTR_ERR(crtc_state);

	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
	0,
	INT_MAX, true, true);
	if (ret < 0)
	return ret;

	/*
	* The HW is only able to start drawing at subpixel boundary
	* (the two first checks bellow). At the end of a row the HW
	* can only jump integer number of subpixels forward to the
	* beginning of the next row. So we can only show picture with
	* integer subpixel width (the third check). However, after
	* reaching the end of the drawn picture the drawing starts
	* again at the absolute memory address where top left corner
	* position of the drawn picture is (so there is no need to
	* check for odd height).
	*/

	finfo = drm_format_info(new_plane_state->fb->format->format);

	if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
	dev_dbg(ddev->dev,
	"%s: x-position %u not divisible subpixel size %u\n",
	__func__, (new_plane_state->src_x >> 16), finfo->hsub);
	return -EINVAL;
	}

	if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
	dev_dbg(ddev->dev,
	"%s: y-position %u not divisible subpixel size %u\n",
	__func__, (new_plane_state->src_y >> 16), finfo->vsub);
	return -EINVAL;
	}

	if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
	dev_dbg(ddev->dev,
	"%s: src width %u not divisible by subpixel size %u\n",
	__func__, (new_plane_state->src_w >> 16),
	finfo->hsub);
	return -EINVAL;
	}

	if (!new_plane_state->visible)
	return 0;

	hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;

	ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
	hw_videoport);
	if (ret)
	return ret;

	return 0;
	}

	static void tidss_plane_atomic_update(struct drm_plane *plane,
	struct drm_atomic_state *state)
	{
	struct drm_device *ddev = plane->dev;
	struct tidss_device *tidss = to_tidss(ddev);
	struct tidss_plane *tplane = to_tidss_plane(plane);
	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
	plane);
	u32 hw_videoport;

	dev_dbg(ddev->dev, "%s\n", __func__);

	if (!new_state->visible) {
	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
	return;
	}

	hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;

	dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
	}

	static void tidss_plane_atomic_enable(struct drm_plane *plane,
	struct drm_atomic_state *state)
	{
	struct drm_device *ddev = plane->dev;
	struct tidss_device *tidss = to_tidss(ddev);
	struct tidss_plane *tplane = to_tidss_plane(plane);

	dev_dbg(ddev->dev, "%s\n", __func__);

	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
	}

	static void tidss_plane_atomic_disable(struct drm_plane *plane,
	struct drm_atomic_state *state)
	{
	struct drm_device *ddev = plane->dev;
	struct tidss_device *tidss = to_tidss(ddev);
	struct tidss_plane *tplane = to_tidss_plane(plane);

	dev_dbg(ddev->dev, "%s\n", __func__);

	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
	}

	static void drm_plane_destroy(struct drm_plane *plane)
	{
	struct tidss_plane *tplane = to_tidss_plane(plane);

	drm_plane_cleanup(plane);
	kfree(tplane);
	}

	static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
	.atomic_check = tidss_plane_atomic_check,
	.atomic_update = tidss_plane_atomic_update,
	.atomic_enable = tidss_plane_atomic_enable,
	.atomic_disable = tidss_plane_atomic_disable,
	};

	static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = {
	.atomic_check = tidss_plane_atomic_check,
	.atomic_update = tidss_plane_atomic_update,
	.atomic_enable = tidss_plane_atomic_enable,
	.atomic_disable = tidss_plane_atomic_disable,
	.get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
	};

	static const struct drm_plane_funcs tidss_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.reset = drm_atomic_helper_plane_reset,
	.destroy = drm_plane_destroy,
	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
	};

	struct tidss_plane tidss_plane_create(struct tidss_device tidss,
	u32 hw_plane_id, u32 plane_type,
	u32 crtc_mask, const u32 *formats,
	u32 num_formats)
	{
	struct tidss_plane *tplane;
	enum drm_plane_type type;
	u32 possible_crtcs;
	u32 num_planes = tidss->feat->num_planes;
	u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) \|
	BIT(DRM_COLOR_YCBCR_BT709));
	u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) \|
	BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
	u32 default_encoding = DRM_COLOR_YCBCR_BT601;
	u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
	u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) \|
	BIT(DRM_MODE_BLEND_COVERAGE));
	int ret;

	tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
	if (!tplane)
	return ERR_PTR(-ENOMEM);

	tplane->hw_plane_id = hw_plane_id;

	possible_crtcs = crtc_mask;
	type = plane_type;

	ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
	possible_crtcs,
	&tidss_plane_funcs,
	formats, num_formats,
	NULL, type, NULL);
	if (ret < 0)
	goto err;

	if (type == DRM_PLANE_TYPE_PRIMARY)
	drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs);
	else
	drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);

	drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
	num_planes - 1);

	ret = drm_plane_create_color_properties(&tplane->plane,
	color_encodings,
	color_ranges,
	default_encoding,
	default_range);
	if (ret)
	goto err;

	ret = drm_plane_create_alpha_property(&tplane->plane);
	if (ret)
	goto err;

	ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
	if (ret)
	goto err;

	return tplane;

	err:
	kfree(tplane);
	return ERR_PTR(ret);
	}