1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
  5 */
  6
  7#include <drm/drm_atomic.h>
  8#include <drm/drm_atomic_helper.h>
  9#include <drm/drm_blend.h>
 10#include <drm/drm_crtc.h>
 11#include <drm/drm_fourcc.h>
 12#include <drm/drm_framebuffer.h>
 13#include <drm/drm_gem_atomic_helper.h>
 14
 15#include "tidss_crtc.h"
 16#include "tidss_dispc.h"
 17#include "tidss_drv.h"
 18#include "tidss_plane.h"
 19
 20/* drm_plane_helper_funcs */
 21
 22static int tidss_plane_atomic_check(struct drm_plane *plane,
 23				    struct drm_atomic_state *state)
 24{
 25	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 26										 plane);
 27	struct drm_device *ddev = plane->dev;
 28	struct tidss_device *tidss = to_tidss(ddev);
 29	struct tidss_plane *tplane = to_tidss_plane(plane);
 30	const struct drm_format_info *finfo;
 31	struct drm_crtc_state *crtc_state;
 32	u32 hw_plane = tplane->hw_plane_id;
 33	u32 hw_videoport;
 34	int ret;
 35
 36	dev_dbg(ddev->dev, "%s\n", __func__);
 37
 38	if (!new_plane_state->crtc) {
 39		/*
 40		 * The visible field is not reset by the DRM core but only
 41		 * updated by drm_atomic_helper_check_plane_state(), set it
 42		 * manually.
 43		 */
 44		new_plane_state->visible = false;
 45		return 0;
 46	}
 47
 48	crtc_state = drm_atomic_get_crtc_state(state,
 49					       new_plane_state->crtc);
 50	if (IS_ERR(crtc_state))
 51		return PTR_ERR(crtc_state);
 52
 53	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 54						  0,
 55						  INT_MAX, true, true);
 56	if (ret < 0)
 57		return ret;
 58
 59	/*
 60	 * The HW is only able to start drawing at subpixel boundary
 61	 * (the two first checks bellow). At the end of a row the HW
 62	 * can only jump integer number of subpixels forward to the
 63	 * beginning of the next row. So we can only show picture with
 64	 * integer subpixel width (the third check). However, after
 65	 * reaching the end of the drawn picture the drawing starts
 66	 * again at the absolute memory address where top left corner
 67	 * position of the drawn picture is (so there is no need to
 68	 * check for odd height).
 69	 */
 70
 71	finfo = drm_format_info(new_plane_state->fb->format->format);
 72
 73	if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
 74		dev_dbg(ddev->dev,
 75			"%s: x-position %u not divisible subpixel size %u\n",
 76			__func__, (new_plane_state->src_x >> 16), finfo->hsub);
 77		return -EINVAL;
 78	}
 79
 80	if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
 81		dev_dbg(ddev->dev,
 82			"%s: y-position %u not divisible subpixel size %u\n",
 83			__func__, (new_plane_state->src_y >> 16), finfo->vsub);
 84		return -EINVAL;
 85	}
 86
 87	if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
 88		dev_dbg(ddev->dev,
 89			"%s: src width %u not divisible by subpixel size %u\n",
 90			 __func__, (new_plane_state->src_w >> 16),
 91			 finfo->hsub);
 92		return -EINVAL;
 93	}
 94
 95	if (!new_plane_state->visible)
 96		return 0;
 97
 98	hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;
 99
100	ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
101				hw_videoport);
102	if (ret)
103		return ret;
104
105	return 0;
106}
107
108static void tidss_plane_atomic_update(struct drm_plane *plane,
109				      struct drm_atomic_state *state)
110{
111	struct drm_device *ddev = plane->dev;
112	struct tidss_device *tidss = to_tidss(ddev);
113	struct tidss_plane *tplane = to_tidss_plane(plane);
114	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
115									   plane);
116	u32 hw_videoport;
117
118	dev_dbg(ddev->dev, "%s\n", __func__);
119
120	if (!new_state->visible) {
121		dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
122		return;
123	}
124
125	hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;
126
127	dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
128}
129
130static void tidss_plane_atomic_enable(struct drm_plane *plane,
131				      struct drm_atomic_state *state)
132{
133	struct drm_device *ddev = plane->dev;
134	struct tidss_device *tidss = to_tidss(ddev);
135	struct tidss_plane *tplane = to_tidss_plane(plane);
136
137	dev_dbg(ddev->dev, "%s\n", __func__);
138
139	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
140}
141
142static void tidss_plane_atomic_disable(struct drm_plane *plane,
143				       struct drm_atomic_state *state)
144{
145	struct drm_device *ddev = plane->dev;
146	struct tidss_device *tidss = to_tidss(ddev);
147	struct tidss_plane *tplane = to_tidss_plane(plane);
148
149	dev_dbg(ddev->dev, "%s\n", __func__);
150
151	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
152}
153
154static void drm_plane_destroy(struct drm_plane *plane)
155{
156	struct tidss_plane *tplane = to_tidss_plane(plane);
157
158	drm_plane_cleanup(plane);
159	kfree(tplane);
160}
161
162static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
163	.atomic_check = tidss_plane_atomic_check,
164	.atomic_update = tidss_plane_atomic_update,
165	.atomic_enable = tidss_plane_atomic_enable,
166	.atomic_disable = tidss_plane_atomic_disable,
167};
168
169static const struct drm_plane_funcs tidss_plane_funcs = {
170	.update_plane = drm_atomic_helper_update_plane,
171	.disable_plane = drm_atomic_helper_disable_plane,
172	.reset = drm_atomic_helper_plane_reset,
173	.destroy = drm_plane_destroy,
174	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
175	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
176};
177
178struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
179				       u32 hw_plane_id, u32 plane_type,
180				       u32 crtc_mask, const u32 *formats,
181				       u32 num_formats)
182{
183	struct tidss_plane *tplane;
184	enum drm_plane_type type;
185	u32 possible_crtcs;
186	u32 num_planes = tidss->feat->num_planes;
187	u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
188			       BIT(DRM_COLOR_YCBCR_BT709));
189	u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
190			    BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
191	u32 default_encoding = DRM_COLOR_YCBCR_BT601;
192	u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
193	u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
194			   BIT(DRM_MODE_BLEND_COVERAGE));
195	int ret;
196
197	tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
198	if (!tplane)
199		return ERR_PTR(-ENOMEM);
200
201	tplane->hw_plane_id = hw_plane_id;
202
203	possible_crtcs = crtc_mask;
204	type = plane_type;
205
206	ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
207				       possible_crtcs,
208				       &tidss_plane_funcs,
209				       formats, num_formats,
210				       NULL, type, NULL);
211	if (ret < 0)
212		goto err;
213
214	drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);
215
216	drm_plane_create_zpos_property(&tplane->plane, hw_plane_id, 0,
217				       num_planes - 1);
218
219	ret = drm_plane_create_color_properties(&tplane->plane,
220						color_encodings,
221						color_ranges,
222						default_encoding,
223						default_range);
224	if (ret)
225		goto err;
226
227	ret = drm_plane_create_alpha_property(&tplane->plane);
228	if (ret)
229		goto err;
230
231	ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
232	if (ret)
233		goto err;
234
235	return tplane;
236
237err:
238	kfree(tplane);
239	return ERR_PTR(ret);
240}