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
216
217
218
219
220
221
222
223
|
From 76359522fa9c449fb715d1933523c153cc1871f3 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 29 Sep 2016 10:34:21 -0700
Subject: [PATCH] drm/vc4: Set up the AVI and SPD infoframes.
Fixes a purple bar on the left side of the screen with my Dell
2408WFP. It will also be required for supporting the double-clocked
video modes.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 136 +++++++++++++++++++++++++++++++++++++++--
drivers/gpu/drm/vc4/vc4_regs.h | 5 ++
2 files changed, 136 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -62,6 +62,8 @@ struct vc4_hdmi {
struct vc4_hdmi_encoder {
struct vc4_encoder base;
bool hdmi_monitor;
+ bool limited_rgb_range;
+ bool rgb_range_selectable;
};
static inline struct vc4_hdmi_encoder *
@@ -205,6 +207,12 @@ static int vc4_hdmi_connector_get_modes(
return -ENODEV;
vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
+
+ if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
+ vc4_encoder->rgb_range_selectable =
+ drm_rgb_quant_range_selectable(edid);
+ }
+
drm_mode_connector_update_edid_property(connector, edid);
ret = drm_add_edid_modes(connector, edid);
@@ -281,6 +289,117 @@ static const struct drm_encoder_funcs vc
.destroy = vc4_hdmi_encoder_destroy,
};
+static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
+ enum hdmi_infoframe_type type)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ u32 packet_id = type - 0x80;
+
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
+
+ return wait_for(!(HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
+ BIT(packet_id)), 100);
+}
+
+static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
+ union hdmi_infoframe *frame)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ u32 packet_id = frame->any.type - 0x80;
+ u32 packet_reg = VC4_HDMI_GCP_0 + VC4_HDMI_PACKET_STRIDE * packet_id;
+ uint8_t buffer[VC4_HDMI_PACKET_STRIDE];
+ ssize_t len, i;
+ int ret;
+
+ WARN_ONCE(!(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
+ VC4_HDMI_RAM_PACKET_ENABLE),
+ "Packet RAM has to be on to store the packet.");
+
+ len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
+ if (len < 0)
+ return;
+
+ ret = vc4_hdmi_stop_packet(encoder, frame->any.type);
+ if (ret) {
+ DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
+ return;
+ }
+
+ for (i = 0; i < len; i += 7) {
+ HDMI_WRITE(packet_reg,
+ buffer[i + 0] << 0 |
+ buffer[i + 1] << 8 |
+ buffer[i + 2] << 16);
+ packet_reg += 4;
+
+ HDMI_WRITE(packet_reg,
+ buffer[i + 3] << 0 |
+ buffer[i + 4] << 8 |
+ buffer[i + 5] << 16 |
+ buffer[i + 6] << 24);
+ packet_reg += 4;
+ }
+
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
+ ret = wait_for((HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
+ BIT(packet_id)), 100);
+ if (ret)
+ DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
+}
+
+static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
+{
+ struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ union hdmi_infoframe frame;
+ int ret;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode);
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill AVI infoframe\n");
+ return;
+ }
+
+ if (vc4_encoder->rgb_range_selectable) {
+ if (vc4_encoder->limited_rgb_range) {
+ frame.avi.quantization_range =
+ HDMI_QUANTIZATION_RANGE_LIMITED;
+ } else {
+ frame.avi.quantization_range =
+ HDMI_QUANTIZATION_RANGE_FULL;
+ }
+ }
+
+ vc4_hdmi_write_infoframe(encoder, &frame);
+}
+
+static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
+{
+ union hdmi_infoframe frame;
+ int ret;
+
+ ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
+ if (ret < 0) {
+ DRM_ERROR("couldn't fill SPD infoframe\n");
+ return;
+ }
+
+ frame.spd.sdi = HDMI_SPD_SDI_PC;
+
+ vc4_hdmi_write_infoframe(encoder, &frame);
+}
+
+static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
+{
+ vc4_hdmi_set_avi_infoframe(encoder);
+ vc4_hdmi_set_spd_infoframe(encoder);
+}
+
static void vc4_hdmi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *unadjusted_mode,
struct drm_display_mode *mode)
@@ -349,8 +468,9 @@ static void vc4_hdmi_encoder_mode_set(st
if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
/* CEA VICs other than #1 requre limited range RGB
- * output. Apply a colorspace conversion to squash
- * 0-255 down to 16-235. The matrix here is:
+ * output unless overridden by an AVI infoframe.
+ * Apply a colorspace conversion to squash 0-255 down
+ * to 16-235. The matrix here is:
*
* [ 0 0 0.8594 16]
* [ 0 0.8594 0 16]
@@ -368,6 +488,9 @@ static void vc4_hdmi_encoder_mode_set(st
HD_WRITE(VC4_HD_CSC_24_23, (0x100 << 16) | 0x000);
HD_WRITE(VC4_HD_CSC_32_31, (0x000 << 16) | 0x6e0);
HD_WRITE(VC4_HD_CSC_34_33, (0x100 << 16) | 0x000);
+ vc4_encoder->limited_rgb_range = true;
+ } else {
+ vc4_encoder->limited_rgb_range = false;
}
/* The RGB order applies even when CSC is disabled. */
@@ -386,6 +509,8 @@ static void vc4_hdmi_encoder_disable(str
struct drm_device *dev = encoder->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG, 0);
+
HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
HD_WRITE(VC4_HD_VID_CTL,
HD_READ(VC4_HD_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
@@ -438,9 +563,10 @@ static void vc4_hdmi_encoder_enable(stru
HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
- /* XXX: Set HDMI_RAM_PACKET_CONFIG (1 << 16) and set
- * up the infoframe.
- */
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ VC4_HDMI_RAM_PACKET_ENABLE);
+
+ vc4_hdmi_set_infoframes(encoder);
drift = HDMI_READ(VC4_HDMI_FIFO_CTL);
drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -443,6 +443,8 @@
#define VC4_HDMI_RAM_PACKET_CONFIG 0x0a0
# define VC4_HDMI_RAM_PACKET_ENABLE BIT(16)
+#define VC4_HDMI_RAM_PACKET_STATUS 0x0a4
+
#define VC4_HDMI_HORZA 0x0c4
# define VC4_HDMI_HORZA_VPOS BIT(14)
# define VC4_HDMI_HORZA_HPOS BIT(13)
@@ -504,6 +506,9 @@
#define VC4_HDMI_TX_PHY_RESET_CTL 0x2c0
+#define VC4_HDMI_GCP_0 0x400
+#define VC4_HDMI_PACKET_STRIDE 0x24
+
#define VC4_HD_M_CTL 0x00c
# define VC4_HD_M_REGISTER_FILE_STANDBY (3 << 6)
# define VC4_HD_M_RAM_STANDBY (3 << 4)
|
