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_fb_dma_helper.h>
 12#include <drm/drm_fourcc.h>
 13#include <drm/drm_framebuffer.h>
 14#include <drm/drm_gem_atomic_helper.h>
 15
 16#include "tidss_crtc.h"
 17#include "tidss_dispc.h"
 18#include "tidss_drv.h"
 19#include "tidss_plane.h"
 20
 21/* drm_plane_helper_funcs */
 22
 23static int tidss_plane_atomic_check(struct drm_plane *plane,
 24				    struct drm_atomic_state *state)
 25{
 26	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 27										 plane);
 28	struct drm_device *ddev = plane->dev;
 29	struct tidss_device *tidss = to_tidss(ddev);
 30	struct tidss_plane *tplane = to_tidss_plane(plane);
 31	const struct drm_format_info *finfo;
 32	struct drm_crtc_state *crtc_state;
 33	u32 hw_plane = tplane->hw_plane_id;
 34	u32 hw_videoport;
 35	int ret;
 36
 37	dev_dbg(ddev->dev, "%s\n", __func__);
 38
 39	if (!new_plane_state->crtc) {
 40		/*
 41		 * The visible field is not reset by the DRM core but only
 42		 * updated by drm_atomic_helper_check_plane_state(), set it
 43		 * manually.
 44		 */
 45		new_plane_state->visible = false;
 46		return 0;
 47	}
 48
 49	crtc_state = drm_atomic_get_crtc_state(state,
 50					       new_plane_state->crtc);
 51	if (IS_ERR(crtc_state))
 52		return PTR_ERR(crtc_state);
 53
 54	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
 55						  0,
 56						  INT_MAX, true, true);
 57	if (ret < 0)
 58		return ret;
 59
 60	/*
 61	 * The HW is only able to start drawing at subpixel boundary
 62	 * (the two first checks bellow). At the end of a row the HW
 63	 * can only jump integer number of subpixels forward to the
 64	 * beginning of the next row. So we can only show picture with
 65	 * integer subpixel width (the third check). However, after
 66	 * reaching the end of the drawn picture the drawing starts
 67	 * again at the absolute memory address where top left corner
 68	 * position of the drawn picture is (so there is no need to
 69	 * check for odd height).
 70	 */
 71
 72	finfo = drm_format_info(new_plane_state->fb->format->format);
 73
 74	if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
 75		dev_dbg(ddev->dev,
 76			"%s: x-position %u not divisible subpixel size %u\n",
 77			__func__, (new_plane_state->src_x >> 16), finfo->hsub);
 78		return -EINVAL;
 79	}
 80
 81	if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
 82		dev_dbg(ddev->dev,
 83			"%s: y-position %u not divisible subpixel size %u\n",
 84			__func__, (new_plane_state->src_y >> 16), finfo->vsub);
 85		return -EINVAL;
 86	}
 87
 88	if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
 89		dev_dbg(ddev->dev,
 90			"%s: src width %u not divisible by subpixel size %u\n",
 91			 __func__, (new_plane_state->src_w >> 16),
 92			 finfo->hsub);
 93		return -EINVAL;
 94	}
 95
 96	if (!new_plane_state->visible)
 97		return 0;
 98
 99	hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;
100
101	ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
102				hw_videoport);
103	if (ret)
104		return ret;
105
106	return 0;
107}
108
109static void tidss_plane_atomic_update(struct drm_plane *plane,
110				      struct drm_atomic_state *state)
111{
112	struct drm_device *ddev = plane->dev;
113	struct tidss_device *tidss = to_tidss(ddev);
114	struct tidss_plane *tplane = to_tidss_plane(plane);
115	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
116									   plane);
117	u32 hw_videoport;
118
119	dev_dbg(ddev->dev, "%s\n", __func__);
120
121	if (!new_state->visible) {
122		dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
123		return;
124	}
125
126	hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;
127
128	dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
129}
130
131static void tidss_plane_atomic_enable(struct drm_plane *plane,
132				      struct drm_atomic_state *state)
133{
134	struct drm_device *ddev = plane->dev;
135	struct tidss_device *tidss = to_tidss(ddev);
136	struct tidss_plane *tplane = to_tidss_plane(plane);
137
138	dev_dbg(ddev->dev, "%s\n", __func__);
139
140	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
141}
142
143static void tidss_plane_atomic_disable(struct drm_plane *plane,
144				       struct drm_atomic_state *state)
145{
146	struct drm_device *ddev = plane->dev;
147	struct tidss_device *tidss = to_tidss(ddev);
148	struct tidss_plane *tplane = to_tidss_plane(plane);
149
150	dev_dbg(ddev->dev, "%s\n", __func__);
151
152	dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
153}
154
155static void drm_plane_destroy(struct drm_plane *plane)
156{
157	struct tidss_plane *tplane = to_tidss_plane(plane);
158
159	drm_plane_cleanup(plane);
160	kfree(tplane);
161}
162
163static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
164	.atomic_check = tidss_plane_atomic_check,
165	.atomic_update = tidss_plane_atomic_update,
166	.atomic_enable = tidss_plane_atomic_enable,
167	.atomic_disable = tidss_plane_atomic_disable,
168};
169
170static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = {
171	.atomic_check = tidss_plane_atomic_check,
172	.atomic_update = tidss_plane_atomic_update,
173	.atomic_enable = tidss_plane_atomic_enable,
174	.atomic_disable = tidss_plane_atomic_disable,
175	.get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
176};
177
178static const struct drm_plane_funcs tidss_plane_funcs = {
179	.update_plane = drm_atomic_helper_update_plane,
180	.disable_plane = drm_atomic_helper_disable_plane,
181	.reset = drm_atomic_helper_plane_reset,
182	.destroy = drm_plane_destroy,
183	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
184	.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
185};
186
187struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
188				       u32 hw_plane_id, u32 plane_type,
189				       u32 crtc_mask, const u32 *formats,
190				       u32 num_formats)
191{
192	struct tidss_plane *tplane;
193	enum drm_plane_type type;
194	u32 possible_crtcs;
195	u32 num_planes = tidss->feat->num_planes;
196	u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
197			       BIT(DRM_COLOR_YCBCR_BT709));
198	u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
199			    BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
200	u32 default_encoding = DRM_COLOR_YCBCR_BT601;
201	u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
202	u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
203			   BIT(DRM_MODE_BLEND_COVERAGE));
204	int ret;
205
206	tplane = kzalloc(sizeof(*tplane), GFP_KERNEL);
207	if (!tplane)
208		return ERR_PTR(-ENOMEM);
209
210	tplane->hw_plane_id = hw_plane_id;
211
212	possible_crtcs = crtc_mask;
213	type = plane_type;
214
215	ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
216				       possible_crtcs,
217				       &tidss_plane_funcs,
218				       formats, num_formats,
219				       NULL, type, NULL);
220	if (ret < 0)
221		goto err;
222
223	if (type == DRM_PLANE_TYPE_PRIMARY)
224		drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs);
225	else
226		drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);
227
228	drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
229				       num_planes - 1);
230
231	ret = drm_plane_create_color_properties(&tplane->plane,
232						color_encodings,
233						color_ranges,
234						default_encoding,
235						default_range);
236	if (ret)
237		goto err;
238
239	ret = drm_plane_create_alpha_property(&tplane->plane);
240	if (ret)
241		goto err;
242
243	ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
244	if (ret)
245		goto err;
246
247	return tplane;
248
249err:
250	kfree(tplane);
251	return ERR_PTR(ret);
252}