mtk_plane.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (c) 2015 MediaTek Inc.
  4 * Author: CK Hu <ck.hu@mediatek.com>
  5 */
  6
  7#include <drm/drm_atomic.h>
  8#include <drm/drm_atomic_helper.h>
  9#include <drm/drm_atomic_uapi.h>
 10#include <drm/drm_blend.h>
 11#include <drm/drm_fourcc.h>
 12#include <drm/drm_framebuffer.h>
 13#include <drm/drm_gem_atomic_helper.h>
 14#include <drm/drm_gem_dma_helper.h>
 15#include <drm/drm_print.h>
 16#include <linux/align.h>
 17
 18#include "mtk_crtc.h"
 19#include "mtk_ddp_comp.h"
 20#include "mtk_drm_drv.h"
 21#include "mtk_plane.h"
 22
 23static const u64 modifiers[] = {
 24	DRM_FORMAT_MOD_LINEAR,
 25	DRM_FORMAT_MOD_INVALID,
 26};
 27
 28static void mtk_plane_reset(struct drm_plane *plane)
 29{
 30	struct mtk_plane_state *state;
 31
 32	if (plane->state) {
 33		__drm_atomic_helper_plane_destroy_state(plane->state);
 34
 35		state = to_mtk_plane_state(plane->state);
 36		memset(state, 0, sizeof(*state));
 37	} else {
 38		state = kzalloc(sizeof(*state), GFP_KERNEL);
 39		if (!state)
 40			return;
 41	}
 42
 43	__drm_atomic_helper_plane_reset(plane, &state->base);
 44
 45	state->base.plane = plane;
 46	state->pending.format = DRM_FORMAT_RGB565;
 47	state->pending.modifier = DRM_FORMAT_MOD_LINEAR;
 48}
 49
 50static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
 51{
 52	struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
 53	struct mtk_plane_state *state;
 54
 55	state = kmalloc(sizeof(*state), GFP_KERNEL);
 56	if (!state)
 57		return NULL;
 58
 59	__drm_atomic_helper_plane_duplicate_state(plane, &state->base);
 60
 61	WARN_ON(state->base.plane != plane);
 62
 63	state->pending = old_state->pending;
 64
 65	return &state->base;
 66}
 67
 68static bool mtk_plane_format_mod_supported(struct drm_plane *plane,
 69					   uint32_t format,
 70					   uint64_t modifier)
 71{
 72	return modifier == DRM_FORMAT_MOD_LINEAR;
 73}
 74
 75static void mtk_plane_destroy_state(struct drm_plane *plane,
 76				    struct drm_plane_state *state)
 77{
 78	__drm_atomic_helper_plane_destroy_state(state);
 79	kfree(to_mtk_plane_state(state));
 80}
 81
 82static int mtk_plane_atomic_async_check(struct drm_plane *plane,
 83					struct drm_atomic_state *state, bool flip)
 84{
 85	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
 86										 plane);
 87	struct drm_crtc_state *crtc_state;
 88	int ret;
 89
 90	if (plane != new_plane_state->crtc->cursor)
 91		return -EINVAL;
 92
 93	if (!plane->state)
 94		return -EINVAL;
 95
 96	if (!plane->state->fb)
 97		return -EINVAL;
 98
 99	ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
100				   to_mtk_plane_state(new_plane_state));
101	if (ret)
102		return ret;
103
104	crtc_state = drm_atomic_get_new_crtc_state(state,
105						   new_plane_state->crtc);
106
107	return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
108						   DRM_PLANE_NO_SCALING,
109						   DRM_PLANE_NO_SCALING,
110						   true, true);
111}
112
113static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
114				       struct mtk_plane_state *mtk_plane_state)
115{
116	struct drm_framebuffer *fb = new_state->fb;
117	struct drm_gem_dma_object *dma_obj;
118	struct drm_gem_object *gem;
119	unsigned int pitch, format;
120	u64 modifier;
121	dma_addr_t addr;
122	dma_addr_t hdr_addr = 0;
123	unsigned int hdr_pitch = 0;
124	int offset;
125
126	gem = fb->obj[0];
127	dma_obj = to_drm_gem_dma_obj(gem);
128	addr = dma_obj->dma_addr;
129	pitch = fb->pitches[0];
130	format = fb->format->format;
131	modifier = fb->modifier;
132
133	if (modifier == DRM_FORMAT_MOD_LINEAR) {
134		/*
135		 * Using dma_addr_t variable to calculate with multiplier of different types,
136		 * for example: addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
137		 * may cause coverity issue with unintentional overflow.
138		 */
139		offset = (new_state->src.x1 >> 16) * fb->format->cpp[0];
140		addr += offset;
141		offset = (new_state->src.y1 >> 16) * pitch;
142		addr += offset;
143	} else {
144		int width_in_blocks = ALIGN(fb->width, AFBC_DATA_BLOCK_WIDTH)
145				      / AFBC_DATA_BLOCK_WIDTH;
146		int height_in_blocks = ALIGN(fb->height, AFBC_DATA_BLOCK_HEIGHT)
147				       / AFBC_DATA_BLOCK_HEIGHT;
148		int x_offset_in_blocks = (new_state->src.x1 >> 16) / AFBC_DATA_BLOCK_WIDTH;
149		int y_offset_in_blocks = (new_state->src.y1 >> 16) / AFBC_DATA_BLOCK_HEIGHT;
150		int hdr_size, hdr_offset;
151
152		hdr_pitch = width_in_blocks * AFBC_HEADER_BLOCK_SIZE;
153		pitch = width_in_blocks * AFBC_DATA_BLOCK_WIDTH *
154			AFBC_DATA_BLOCK_HEIGHT * fb->format->cpp[0];
155
156		hdr_size = ALIGN(hdr_pitch * height_in_blocks, AFBC_HEADER_ALIGNMENT);
157		hdr_offset = hdr_pitch * y_offset_in_blocks +
158			AFBC_HEADER_BLOCK_SIZE * x_offset_in_blocks;
159
160		/*
161		 * Using dma_addr_t variable to calculate with multiplier of different types,
162		 * for example: addr += hdr_pitch * y_offset_in_blocks;
163		 * may cause coverity issue with unintentional overflow.
164		 */
165		hdr_addr = addr + hdr_offset;
166
167		/* The data plane is offset by 1 additional block. */
168		offset = pitch * y_offset_in_blocks +
169			 AFBC_DATA_BLOCK_WIDTH * AFBC_DATA_BLOCK_HEIGHT *
170			 fb->format->cpp[0] * (x_offset_in_blocks + 1);
171
172		/*
173		 * Using dma_addr_t variable to calculate with multiplier of different types,
174		 * for example: addr += pitch * y_offset_in_blocks;
175		 * may cause coverity issue with unintentional overflow.
176		 */
177		addr = addr + hdr_size + offset;
178	}
179
180	mtk_plane_state->pending.enable = true;
181	mtk_plane_state->pending.pitch = pitch;
182	mtk_plane_state->pending.hdr_pitch = hdr_pitch;
183	mtk_plane_state->pending.format = format;
184	mtk_plane_state->pending.modifier = modifier;
185	mtk_plane_state->pending.addr = addr;
186	mtk_plane_state->pending.hdr_addr = hdr_addr;
187	mtk_plane_state->pending.x = new_state->dst.x1;
188	mtk_plane_state->pending.y = new_state->dst.y1;
189	mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
190	mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
191	mtk_plane_state->pending.rotation = new_state->rotation;
192	mtk_plane_state->pending.color_encoding = new_state->color_encoding;
193}
194
195static void mtk_plane_atomic_async_update(struct drm_plane *plane,
196					  struct drm_atomic_state *state)
197{
198	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
199									   plane);
200	struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
201
202	plane->state->crtc_x = new_state->crtc_x;
203	plane->state->crtc_y = new_state->crtc_y;
204	plane->state->crtc_h = new_state->crtc_h;
205	plane->state->crtc_w = new_state->crtc_w;
206	plane->state->src_x = new_state->src_x;
207	plane->state->src_y = new_state->src_y;
208	plane->state->src_h = new_state->src_h;
209	plane->state->src_w = new_state->src_w;
210	plane->state->dst.x1 = new_state->dst.x1;
211	plane->state->dst.y1 = new_state->dst.y1;
212
213	mtk_plane_update_new_state(new_state, new_plane_state);
214	swap(plane->state->fb, new_state->fb);
215	wmb(); /* Make sure the above parameters are set before update */
216	new_plane_state->pending.async_dirty = true;
217	mtk_crtc_async_update(new_state->crtc, plane, state);
218}
219
220static const struct drm_plane_funcs mtk_plane_funcs = {
221	.update_plane = drm_atomic_helper_update_plane,
222	.disable_plane = drm_atomic_helper_disable_plane,
223	.destroy = drm_plane_cleanup,
224	.reset = mtk_plane_reset,
225	.atomic_duplicate_state = mtk_plane_duplicate_state,
226	.atomic_destroy_state = mtk_plane_destroy_state,
227	.format_mod_supported = mtk_plane_format_mod_supported,
228};
229
230static int mtk_plane_atomic_check(struct drm_plane *plane,
231				  struct drm_atomic_state *state)
232{
233	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
234										 plane);
235	struct drm_framebuffer *fb = new_plane_state->fb;
236	struct drm_crtc_state *crtc_state;
237	int ret;
238
239	if (!fb)
240		return 0;
241
242	if (WARN_ON(!new_plane_state->crtc))
243		return 0;
244
245	ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
246				   to_mtk_plane_state(new_plane_state));
247	if (ret)
248		return ret;
249
250	crtc_state = drm_atomic_get_crtc_state(state,
251					       new_plane_state->crtc);
252	if (IS_ERR(crtc_state))
253		return PTR_ERR(crtc_state);
254
255	return drm_atomic_helper_check_plane_state(new_plane_state,
256						   crtc_state,
257						   DRM_PLANE_NO_SCALING,
258						   DRM_PLANE_NO_SCALING,
259						   true, true);
260}
261
262static void mtk_plane_atomic_disable(struct drm_plane *plane,
263				     struct drm_atomic_state *state)
264{
265	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
266									   plane);
267	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
268	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
269									   plane);
270
271	mtk_plane_state->pending.enable = false;
272	wmb(); /* Make sure the above parameter is set before update */
273	mtk_plane_state->pending.dirty = true;
274
275	if (old_state && old_state->crtc)
276		mtk_crtc_plane_disable(old_state->crtc, plane);
277}
278
279static void mtk_plane_atomic_update(struct drm_plane *plane,
280				    struct drm_atomic_state *state)
281{
282	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
283									   plane);
284	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
285
286	if (!new_state->crtc || WARN_ON(!new_state->fb))
287		return;
288
289	if (!new_state->visible) {
290		mtk_plane_atomic_disable(plane, state);
291		return;
292	}
293
294	mtk_plane_update_new_state(new_state, mtk_plane_state);
295	wmb(); /* Make sure the above parameters are set before update */
296	mtk_plane_state->pending.dirty = true;
297}
298
299static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
300	.atomic_check = mtk_plane_atomic_check,
301	.atomic_update = mtk_plane_atomic_update,
302	.atomic_disable = mtk_plane_atomic_disable,
303	.atomic_async_update = mtk_plane_atomic_async_update,
304	.atomic_async_check = mtk_plane_atomic_async_check,
305};
306
307int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
308		   unsigned long possible_crtcs, enum drm_plane_type type,
309		   unsigned int supported_rotations, const u32 blend_modes,
310		   const u32 *formats, size_t num_formats,
311		   bool supports_afbc, unsigned int plane_idx)
312{
313	int err;
314
315	if (!formats || !num_formats) {
316		DRM_ERROR("no formats for plane\n");
317		return -EINVAL;
318	}
319
320	err = drm_universal_plane_init(dev, plane, possible_crtcs,
321				       &mtk_plane_funcs, formats,
322				       num_formats,
323				       supports_afbc ? modifiers : NULL,
324				       type, NULL);
325	if (err) {
326		DRM_ERROR("failed to initialize plane\n");
327		return err;
328	}
329
330	/*
331	 * The hardware does not support repositioning planes by muxing: their
332	 * Z-position is infact fixed and the only way to change the actual
333	 * order is to swap the contents of the entire register set of one
334	 * overlay with another, which may be more expensive than desired.
335	 *
336	 * With no repositioning, the caller of this function guarantees that
337	 * the plane_idx is correct. This means that, for example, the PRIMARY
338	 * plane fed to this function will always have plane_idx zero.
339	 */
340	err = drm_plane_create_zpos_immutable_property(plane, plane_idx);
341	if (err) {
342		DRM_ERROR("Failed to create zpos property for plane %u\n", plane_idx);
343		return err;
344	}
345
346	if (supported_rotations) {
347		err = drm_plane_create_rotation_property(plane,
348							 DRM_MODE_ROTATE_0,
349							 supported_rotations);
350		if (err)
351			DRM_INFO("Create rotation property failed\n");
352	}
353
354	err = drm_plane_create_alpha_property(plane);
355	if (err)
356		DRM_ERROR("failed to create property: alpha\n");
357
358	if (blend_modes) {
359		err = drm_plane_create_blend_mode_property(plane, blend_modes);
360		if (err)
361			DRM_ERROR("failed to create property: blend_mode\n");
362	}
363
364	drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
365
366	return 0;
367}