1 From b96e24487cc48a2cb593f27c24074087a21de848 Mon Sep 17 00:00:00 2001
2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
3 Date: Fri, 14 Jun 2019 10:12:07 +0100
4 Subject: [PATCH] drm/vc4: Add "Broadcast RGB" connector property
6 Some HDMI monitors do not abide by the full or limited
7 (16-235) range RGB flags in the AVI infoframe. This can
8 result in images looking washed out (if given limited and
9 interpreting as full), or detail disappearing at the extremes
10 (given full and interpreting as limited).
12 Copy the Intel i915 driver's approach of adding an override
13 property ("Broadcast RGB") to force one mode or the other.
15 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
17 drivers/gpu/drm/vc4/vc4_firmware_kms.c | 190 +++++++++++++++++++++++--
18 1 file changed, 177 insertions(+), 13 deletions(-)
20 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
21 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
22 @@ -285,6 +285,13 @@ to_vc4_fkms_encoder(struct drm_encoder *
23 return container_of(encoder, struct vc4_fkms_encoder, base);
26 +/* "Broadcast RGB" property.
27 + * Allows overriding of HDMI full or limited range RGB
29 +#define VC4_BROADCAST_RGB_AUTO 0
30 +#define VC4_BROADCAST_RGB_FULL 1
31 +#define VC4_BROADCAST_RGB_LIMITED 2
33 /* VC4 FKMS connector KMS struct */
34 struct vc4_fkms_connector {
35 struct drm_connector base;
36 @@ -297,6 +304,8 @@ struct vc4_fkms_connector {
37 struct vc4_dev *vc4_dev;
41 + struct drm_property *broadcast_rgb_property;
44 static inline struct vc4_fkms_connector *
45 @@ -305,6 +314,16 @@ to_vc4_fkms_connector(struct drm_connect
46 return container_of(connector, struct vc4_fkms_connector, base);
49 +/* VC4 FKMS connector state */
50 +struct vc4_fkms_connector_state {
51 + struct drm_connector_state base;
56 +#define to_vc4_fkms_connector_state(x) \
57 + container_of(x, struct vc4_fkms_connector_state, base)
59 static u32 vc4_get_display_type(u32 display_number)
61 const u32 display_types[] = {
62 @@ -832,8 +851,6 @@ static void vc4_crtc_mode_set_nofb(struc
63 mode->picture_aspect_ratio, mode->flags);
64 mb.timings.display = vc4_crtc->display_number;
66 - mb.timings.video_id_code = frame.avi.video_code;
68 mb.timings.clock = mode->clock;
69 mb.timings.hdisplay = mode->hdisplay;
70 mb.timings.hsync_start = mode->hsync_start;
71 @@ -871,11 +888,30 @@ static void vc4_crtc_mode_set_nofb(struc
75 - if (!vc4_encoder->hdmi_monitor)
76 + if (!vc4_encoder->hdmi_monitor) {
77 mb.timings.flags |= TIMINGS_FLAGS_DVI;
78 - else if (drm_default_rgb_quant_range(mode) ==
79 + mb.timings.video_id_code = frame.avi.video_code;
81 + struct vc4_fkms_connector_state *conn_state =
82 + to_vc4_fkms_connector_state(vc4_crtc->connector->state);
84 + /* Do not provide a VIC as the HDMI spec requires that we do not
85 + * signal the opposite of the defined range in the AVI
88 + mb.timings.video_id_code = 0;
90 + if (conn_state->broadcast_rgb == VC4_BROADCAST_RGB_AUTO) {
91 + /* See CEA-861-E - 5.1 Default Encoding Parameters */
92 + if (drm_default_rgb_quant_range(mode) ==
93 HDMI_QUANTIZATION_RANGE_LIMITED)
94 - mb.timings.flags |= TIMINGS_FLAGS_RGB_LIMITED;
95 + mb.timings.flags |= TIMINGS_FLAGS_RGB_LIMITED;
97 + if (conn_state->broadcast_rgb ==
98 + VC4_BROADCAST_RGB_LIMITED)
99 + mb.timings.flags |= TIMINGS_FLAGS_RGB_LIMITED;
105 @@ -1340,13 +1376,95 @@ static void vc4_fkms_connector_destroy(s
106 drm_connector_cleanup(connector);
110 + * vc4_connector_duplicate_state - duplicate connector state
111 + * @connector: digital connector
113 + * Allocates and returns a copy of the connector state (both common and
114 + * digital connector specific) for the specified connector.
116 + * Returns: The newly allocated connector state, or NULL on failure.
118 +struct drm_connector_state *
119 +vc4_connector_duplicate_state(struct drm_connector *connector)
121 + struct vc4_fkms_connector_state *state;
123 + state = kmemdup(connector->state, sizeof(*state), GFP_KERNEL);
127 + __drm_atomic_helper_connector_duplicate_state(connector, &state->base);
128 + return &state->base;
132 + * vc4_connector_atomic_get_property - hook for connector->atomic_get_property.
133 + * @connector: Connector to get the property for.
134 + * @state: Connector state to retrieve the property from.
135 + * @property: Property to retrieve.
136 + * @val: Return value for the property.
138 + * Returns the atomic property value for a digital connector.
140 +int vc4_connector_atomic_get_property(struct drm_connector *connector,
141 + const struct drm_connector_state *state,
142 + struct drm_property *property,
145 + struct vc4_fkms_connector *fkms_connector =
146 + to_vc4_fkms_connector(connector);
147 + struct vc4_fkms_connector_state *vc4_conn_state =
148 + to_vc4_fkms_connector_state(state);
150 + if (property == fkms_connector->broadcast_rgb_property) {
151 + *val = vc4_conn_state->broadcast_rgb;
153 + DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
154 + property->base.id, property->name);
162 + * vc4_connector_atomic_set_property - hook for connector->atomic_set_property.
163 + * @connector: Connector to set the property for.
164 + * @state: Connector state to set the property on.
165 + * @property: Property to set.
166 + * @val: New value for the property.
168 + * Sets the atomic property value for a digital connector.
170 +int vc4_connector_atomic_set_property(struct drm_connector *connector,
171 + struct drm_connector_state *state,
172 + struct drm_property *property,
175 + struct vc4_fkms_connector *fkms_connector =
176 + to_vc4_fkms_connector(connector);
177 + struct vc4_fkms_connector_state *vc4_conn_state =
178 + to_vc4_fkms_connector_state(state);
180 + if (property == fkms_connector->broadcast_rgb_property) {
181 + vc4_conn_state->broadcast_rgb = val;
185 + DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n",
186 + property->base.id, property->name);
190 static const struct drm_connector_funcs vc4_fkms_connector_funcs = {
191 .detect = vc4_fkms_connector_detect,
192 .fill_modes = drm_helper_probe_single_connector_modes,
193 .destroy = vc4_fkms_connector_destroy,
194 - .reset = drm_atomic_helper_connector_reset,
195 - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
196 + .atomic_duplicate_state = vc4_connector_duplicate_state,
197 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
198 + .atomic_get_property = vc4_connector_atomic_get_property,
199 + .atomic_set_property = vc4_connector_atomic_set_property,
202 static const struct drm_connector_helper_funcs vc4_fkms_connector_helper_funcs = {
203 @@ -1359,12 +1477,40 @@ static const struct drm_connector_helper
204 .best_encoder = vc4_fkms_connector_best_encoder,
207 +static const struct drm_prop_enum_list broadcast_rgb_names[] = {
208 + { VC4_BROADCAST_RGB_AUTO, "Automatic" },
209 + { VC4_BROADCAST_RGB_FULL, "Full" },
210 + { VC4_BROADCAST_RGB_LIMITED, "Limited 16:235" },
214 +vc4_attach_broadcast_rgb_property(struct vc4_fkms_connector *fkms_connector)
216 + struct drm_device *dev = fkms_connector->base.dev;
217 + struct drm_property *prop;
219 + prop = fkms_connector->broadcast_rgb_property;
221 + prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
223 + broadcast_rgb_names,
224 + ARRAY_SIZE(broadcast_rgb_names));
228 + fkms_connector->broadcast_rgb_property = prop;
231 + drm_object_attach_property(&fkms_connector->base.base, prop, 0);
234 static struct drm_connector *
235 vc4_fkms_connector_init(struct drm_device *dev, struct drm_encoder *encoder,
238 struct drm_connector *connector = NULL;
239 struct vc4_fkms_connector *fkms_connector;
240 + struct vc4_fkms_connector_state *conn_state = NULL;
241 struct vc4_dev *vc4_dev = to_vc4_dev(dev);
244 @@ -1373,9 +1519,18 @@ vc4_fkms_connector_init(struct drm_devic
245 fkms_connector = devm_kzalloc(dev->dev, sizeof(*fkms_connector),
247 if (!fkms_connector) {
250 + return ERR_PTR(-ENOMEM);
254 + * Allocate enough memory to hold vc4_fkms_connector_state,
256 + conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
258 + kfree(fkms_connector);
259 + return ERR_PTR(-ENOMEM);
262 connector = &fkms_connector->base;
264 fkms_connector->encoder = encoder;
265 @@ -1383,6 +1538,9 @@ vc4_fkms_connector_init(struct drm_devic
266 fkms_connector->display_type = vc4_get_display_type(display_num);
267 fkms_connector->vc4_dev = vc4_dev;
269 + __drm_atomic_helper_connector_reset(connector,
270 + &conn_state->base);
272 if (fkms_connector->display_type == DRM_MODE_ENCODER_DSI) {
273 drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
274 DRM_MODE_CONNECTOR_DSI);
275 @@ -1403,10 +1561,14 @@ vc4_fkms_connector_init(struct drm_devic
276 connector->interlace_allowed = 0;
279 - /* Create and attach TV margin props to this connector. */
280 - ret = drm_mode_create_tv_margin_properties(dev);
282 - return ERR_PTR(ret);
283 + /* Create and attach TV margin props to this connector.
284 + * Already done for SDTV outputs.
286 + if (fkms_connector->display_type != DRM_MODE_ENCODER_TVDAC) {
287 + ret = drm_mode_create_tv_margin_properties(dev);
292 drm_connector_attach_tv_margin_properties(connector);
294 @@ -1415,6 +1577,8 @@ vc4_fkms_connector_init(struct drm_devic
296 connector->doublescan_allowed = 0;
298 + vc4_attach_broadcast_rgb_property(fkms_connector);
300 drm_connector_attach_encoder(connector, encoder);