1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
* (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
* Author: Liviu Dudau <Liviu.Dudau@arm.com>
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* ARM Mali DP500/DP550/DP650 driver (crtc operations)
*/
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <linux/clk.h>
#include <video/videomode.h>
#include "malidp_drv.h"
#include "malidp_hw.h"
static bool malidp_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
struct malidp_hw_device *hwdev = malidp->dev;
/*
* check that the hardware can drive the required clock rate,
* but skip the check if the clock is meant to be disabled (req_rate = 0)
*/
long rate, req_rate = mode->crtc_clock * 1000;
if (req_rate) {
rate = clk_round_rate(hwdev->mclk, req_rate);
if (rate < req_rate) {
DRM_DEBUG_DRIVER("mclk clock unable to reach %d kHz\n",
mode->crtc_clock);
return false;
}
rate = clk_round_rate(hwdev->pxlclk, req_rate);
if (rate != req_rate) {
DRM_DEBUG_DRIVER("pxlclk doesn't support %ld Hz\n",
req_rate);
return false;
}
}
return true;
}
static void malidp_crtc_enable(struct drm_crtc *crtc)
{
struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
struct malidp_hw_device *hwdev = malidp->dev;
struct videomode vm;
drm_display_mode_to_videomode(&crtc->state->adjusted_mode, &vm);
clk_prepare_enable(hwdev->pxlclk);
/* We rely on firmware to set mclk to a sensible level. */
clk_set_rate(hwdev->pxlclk, crtc->state->adjusted_mode.crtc_clock * 1000);
hwdev->modeset(hwdev, &vm);
hwdev->leave_config_mode(hwdev);
drm_crtc_vblank_on(crtc);
}
static void malidp_crtc_disable(struct drm_crtc *crtc)
{
struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
struct malidp_hw_device *hwdev = malidp->dev;
drm_crtc_vblank_off(crtc);
hwdev->enter_config_mode(hwdev);
clk_disable_unprepare(hwdev->pxlclk);
}
static int malidp_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct malidp_drm *malidp = crtc_to_malidp_device(crtc);
struct malidp_hw_device *hwdev = malidp->dev;
struct drm_plane *plane;
const struct drm_plane_state *pstate;
u32 rot_mem_free, rot_mem_usable;
int rotated_planes = 0;
/*
* check if there is enough rotation memory available for planes
* that need 90° and 270° rotation. Each plane has set its required
* memory size in the ->plane_check() callback, here we only make
* sure that the sums are less that the total usable memory.
*
* The rotation memory allocation algorithm (for each plane):
* a. If no more rotated planes exist, all remaining rotate
* memory in the bank is available for use by the plane.
* b. If other rotated planes exist, and plane's layer ID is
* DE_VIDEO1, it can use all the memory from first bank if
* secondary rotation memory bank is available, otherwise it can
* use up to half the bank's memory.
* c. If other rotated planes exist, and plane's layer ID is not
* DE_VIDEO1, it can use half of the available memory
*
* Note: this algorithm assumes that the order in which the planes are
* checked always has DE_VIDEO1 plane first in the list if it is
* rotated. Because that is how we create the planes in the first
* place, under current DRM version things work, but if ever the order
* in which drm_atomic_crtc_state_for_each_plane() iterates over planes
* changes, we need to pre-sort the planes before validation.
*/
/* first count the number of rotated planes */
drm_atomic_crtc_state_for_each_plane_state(plane, pstate, state) {
if (pstate->rotation & MALIDP_ROTATED_MASK)
rotated_planes++;
}
rot_mem_free = hwdev->rotation_memory[0];
/*
* if we have more than 1 plane using rotation memory, use the second
* block of rotation memory as well
*/
if (rotated_planes > 1)
rot_mem_free += hwdev->rotation_memory[1];
/* now validate the rotation memory requirements */
drm_atomic_crtc_state_for_each_plane_state(plane, pstate, state) {
struct malidp_plane *mp = to_malidp_plane(plane);
struct malidp_plane_state *ms = to_malidp_plane_state(pstate);
if (pstate->rotation & MALIDP_ROTATED_MASK) {
/* process current plane */
rotated_planes--;
if (!rotated_planes) {
/* no more rotated planes, we can use what's left */
rot_mem_usable = rot_mem_free;
} else {
if ((mp->layer->id != DE_VIDEO1) ||
(hwdev->rotation_memory[1] == 0))
rot_mem_usable = rot_mem_free / 2;
else
rot_mem_usable = hwdev->rotation_memory[0];
}
rot_mem_free -= rot_mem_usable;
if (ms->rotmem_size > rot_mem_usable)
return -EINVAL;
}
}
return 0;
}
static const struct drm_crtc_helper_funcs malidp_crtc_helper_funcs = {
.mode_fixup = malidp_crtc_mode_fixup,
.enable = malidp_crtc_enable,
.disable = malidp_crtc_disable,
.atomic_check = malidp_crtc_atomic_check,
};
static const struct drm_crtc_funcs malidp_crtc_funcs = {
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
};
int malidp_crtc_init(struct drm_device *drm)
{
struct malidp_drm *malidp = drm->dev_private;
struct drm_plane *primary = NULL, *plane;
int ret;
ret = malidp_de_planes_init(drm);
if (ret < 0) {
DRM_ERROR("Failed to initialise planes\n");
return ret;
}
drm_for_each_plane(plane, drm) {
if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
primary = plane;
break;
}
}
if (!primary) {
DRM_ERROR("no primary plane found\n");
ret = -EINVAL;
goto crtc_cleanup_planes;
}
ret = drm_crtc_init_with_planes(drm, &malidp->crtc, primary, NULL,
&malidp_crtc_funcs, NULL);
if (!ret) {
drm_crtc_helper_add(&malidp->crtc, &malidp_crtc_helper_funcs);
return 0;
}
crtc_cleanup_planes:
malidp_de_planes_destroy(drm);
return ret;
}
|
