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
|
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2014, Inforce Computing. All rights reserved.
*
* Author: Vinay Simha <vinaysimha@inforcecomputing.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <drm/drm_crtc.h>
#include <drm/drm_probe_helper.h>
#include "mdp4_kms.h"
struct mdp4_dsi_encoder {
struct drm_encoder base;
struct drm_panel *panel;
bool enabled;
};
#define to_mdp4_dsi_encoder(x) container_of(x, struct mdp4_dsi_encoder, base)
static struct mdp4_kms *get_kms(struct drm_encoder *encoder)
{
struct msm_drm_private *priv = encoder->dev->dev_private;
return to_mdp4_kms(to_mdp_kms(priv->kms));
}
static void mdp4_dsi_encoder_destroy(struct drm_encoder *encoder)
{
struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
drm_encoder_cleanup(encoder);
kfree(mdp4_dsi_encoder);
}
static const struct drm_encoder_funcs mdp4_dsi_encoder_funcs = {
.destroy = mdp4_dsi_encoder_destroy,
};
static void mdp4_dsi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct mdp4_kms *mdp4_kms = get_kms(encoder);
uint32_t dsi_hsync_skew, vsync_period, vsync_len, ctrl_pol;
uint32_t display_v_start, display_v_end;
uint32_t hsync_start_x, hsync_end_x;
mode = adjusted_mode;
DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
ctrl_pol = 0;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
ctrl_pol |= MDP4_DSI_CTRL_POLARITY_HSYNC_LOW;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
ctrl_pol |= MDP4_DSI_CTRL_POLARITY_VSYNC_LOW;
/* probably need to get DATA_EN polarity from panel.. */
dsi_hsync_skew = 0; /* get this from panel? */
hsync_start_x = (mode->htotal - mode->hsync_start);
hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
vsync_period = mode->vtotal * mode->htotal;
vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dsi_hsync_skew;
display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dsi_hsync_skew - 1;
mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_CTRL,
MDP4_DSI_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) |
MDP4_DSI_HSYNC_CTRL_PERIOD(mode->htotal));
mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_PERIOD, vsync_period);
mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_LEN, vsync_len);
mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_HCTRL,
MDP4_DSI_DISPLAY_HCTRL_START(hsync_start_x) |
MDP4_DSI_DISPLAY_HCTRL_END(hsync_end_x));
mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VSTART, display_v_start);
mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VEND, display_v_end);
mdp4_write(mdp4_kms, REG_MDP4_DSI_CTRL_POLARITY, ctrl_pol);
mdp4_write(mdp4_kms, REG_MDP4_DSI_UNDERFLOW_CLR,
MDP4_DSI_UNDERFLOW_CLR_ENABLE_RECOVERY |
MDP4_DSI_UNDERFLOW_CLR_COLOR(0xff));
mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_HCTL,
MDP4_DSI_ACTIVE_HCTL_START(0) |
MDP4_DSI_ACTIVE_HCTL_END(0));
mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_SKEW, dsi_hsync_skew);
mdp4_write(mdp4_kms, REG_MDP4_DSI_BORDER_CLR, 0);
mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VSTART, 0);
mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VEND, 0);
}
static void mdp4_dsi_encoder_disable(struct drm_encoder *encoder)
{
struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
struct mdp4_kms *mdp4_kms = get_kms(encoder);
if (!mdp4_dsi_encoder->enabled)
return;
mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
/*
* Wait for a vsync so we know the ENABLE=0 latched before
* the (connector) source of the vsync's gets disabled,
* otherwise we end up in a funny state if we re-enable
* before the disable latches, which results that some of
* the settings changes for the new modeset (like new
* scanout buffer) don't latch properly..
*/
mdp_irq_wait(&mdp4_kms->base, MDP4_IRQ_PRIMARY_VSYNC);
mdp4_dsi_encoder->enabled = false;
}
static void mdp4_dsi_encoder_enable(struct drm_encoder *encoder)
{
struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
struct mdp4_kms *mdp4_kms = get_kms(encoder);
if (mdp4_dsi_encoder->enabled)
return;
mdp4_crtc_set_config(encoder->crtc,
MDP4_DMA_CONFIG_PACK_ALIGN_MSB |
MDP4_DMA_CONFIG_DEFLKR_EN |
MDP4_DMA_CONFIG_DITHER_EN |
MDP4_DMA_CONFIG_R_BPC(BPC8) |
MDP4_DMA_CONFIG_G_BPC(BPC8) |
MDP4_DMA_CONFIG_B_BPC(BPC8) |
MDP4_DMA_CONFIG_PACK(0x21));
mdp4_crtc_set_intf(encoder->crtc, INTF_DSI_VIDEO, 0);
mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 1);
mdp4_dsi_encoder->enabled = true;
}
static const struct drm_encoder_helper_funcs mdp4_dsi_encoder_helper_funcs = {
.mode_set = mdp4_dsi_encoder_mode_set,
.disable = mdp4_dsi_encoder_disable,
.enable = mdp4_dsi_encoder_enable,
};
/* initialize encoder */
struct drm_encoder *mdp4_dsi_encoder_init(struct drm_device *dev)
{
struct drm_encoder *encoder = NULL;
struct mdp4_dsi_encoder *mdp4_dsi_encoder;
int ret;
mdp4_dsi_encoder = kzalloc(sizeof(*mdp4_dsi_encoder), GFP_KERNEL);
if (!mdp4_dsi_encoder) {
ret = -ENOMEM;
goto fail;
}
encoder = &mdp4_dsi_encoder->base;
drm_encoder_init(dev, encoder, &mdp4_dsi_encoder_funcs,
DRM_MODE_ENCODER_DSI, NULL);
drm_encoder_helper_add(encoder, &mdp4_dsi_encoder_helper_funcs);
return encoder;
fail:
if (encoder)
mdp4_dsi_encoder_destroy(encoder);
return ERR_PTR(ret);
}
|
