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/openbmc/linux/Documentation/devicetree/bindings/display/panel/
H A Dpanel-edp.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/panel/panel-edp.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Douglas Anderson <dianders@chromium.org>
14 to a Embedded DisplayPort AUX bus (see display/dp-aux-bus.yaml) without
17 board, either for second-sourcing purposes or to support multiple SKUs
51 :<T1>:<T2>: :<--T10-->:<T11>:<T12>:
52 : +-----------------------+---------+---------+
53 eDP -----------+ Black video | Src vid | Blk vid +
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H A Dpanel-common.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/display/panel/panel-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Thierry Reding <thierry.reding@gmail.com>
11 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
24 width-mm:
29 height-mm:
41 If no such name exists, and unless the property is mandatory according to
43 non-descriptive information. For instance an LCD panel in a system that
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/openbmc/linux/drivers/gpu/drm/nouveau/nvkm/engine/disp/
H A Dconn.c16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
56 static const u8 hpd[] = { 0x07, 0x08, 0x51, 0x52, 0x5e, 0x5f, 0x60 }; in nvkm_conn_ctor() local
57 struct nvkm_gpio *gpio = disp->engine.subdev.device->gpio; in nvkm_conn_ctor()
61 conn->disp = disp; in nvkm_conn_ctor()
62 conn->index = index; in nvkm_conn_ctor()
63 conn->info = *info; in nvkm_conn_ctor()
64 conn->info.hpd = DCB_GPIO_UNUSED; in nvkm_conn_ctor()
66 CONN_DBG(conn, "type %02x loc %d hpd %02x dp %x di %x sr %x lcdid %x", in nvkm_conn_ctor()
67 info->type, info->location, info->hpd, info->dp, in nvkm_conn_ctor()
68 info->di, info->sr, info->lcdid); in nvkm_conn_ctor()
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/link/protocols/
H A Dlink_hpd.c16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
28 * This file implements functions that manage basic HPD components such as gpio.
29 * It also provides wrapper functions to execute HPD related programming. This
30 * file only manages basic HPD functionality. It doesn't manage detection or
31 * feature or signal specific HPD behaviors.
40 dal_gpio_lock_pin(link->hpd_gpio); in link_get_hpd_state()
41 dal_gpio_get_value(link->hpd_gpio, &state); in link_get_hpd_state()
42 dal_gpio_unlock_pin(link->hpd_gpio); in link_get_hpd_state()
49 struct link_encoder *encoder = link->link_enc; in link_enable_hpd()
51 if (encoder != NULL && encoder->funcs->enable_hpd != NULL) in link_enable_hpd()
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/openbmc/linux/Documentation/userspace-api/media/cec/
H A Dcec-ioc-dqevent.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 CEC_DQEVENT - Dequeue a CEC event
35 non-blocking mode and no event is pending, then it will return -1 and
38 The internal event queues are per-filehandle and per-event type. If
39 there is no more room in a queue then the last event is overwritten with
43 two :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` events with
51 .. flat-table:: struct cec_event_state_change
52 :header-rows: 0
53 :stub-columns: 0
56 * - __u16
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/openbmc/linux/drivers/gpu/drm/display/
H A Ddrm_dp_cec.c1 // SPDX-License-Identifier: GPL-2.0
3 * DisplayPort CEC-Tunneling-over-AUX support
19 * Unfortunately it turns out that we have a chicken-and-egg situation
20 * here. Quite a few active (mini-)DP-to-HDMI or USB-C-to-HDMI adapters
21 * have a converter chip that supports CEC-Tunneling-over-AUX (usually the
23 * useless. Note that MegaChips 2900-based adapters appear to have good
27 * Sadly there is no way for this driver to know this. What happens is
33 * was never supported by any OS. So there was no easy way of testing it,
34 * and no incentive to correctly wire up the CEC pin.
41 * https://hverkuil.home.xs4all.nl/cec-status.txt
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/
H A Dhw_hpd.c2 * Copyright 2012-15 Advanced Micro Devices, Inc.
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
38 hpd->shifts->field_name, hpd->masks->field_name
41 hpd->base.base.ctx
43 (hpd->regs->reg)
50 dal_hw_gpio_destruct(&pin->base); in dal_hw_hpd_destruct()
56 struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr); in dal_hw_hpd_destroy() local
58 dal_hw_hpd_destruct(hpd); in dal_hw_hpd_destroy()
60 kfree(hpd); in dal_hw_hpd_destroy()
69 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr); in get_value() local
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/openbmc/u-boot/doc/
H A DREADME.video1 SPDX-License-Identifier: GPL-2.0+
4 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
7 "video-mode" environment variable
10 The 'video-mode' environment variable can be used to enable and configure
11 some video drivers. The format matches the video= command-line option used
14 video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string>
16 <driver> The video driver name, ignored by U-Boot
21 <options> A comma-separated list of device-specific options
24 U-Boot MPC8xx video controller driver
29 - MPC823FADS with AD7176 on a PAL TV (YCbYCr) - arsenio@tin.it
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/
H A Ddc.h2 * Copyright 2012-2023 Advanced Micro Devices, Inc.
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
99 // for example, 1080p -> 8K is 4.0, or 4000 raw value
107 // for example, 8K -> 1080p is 0.25, or 250 raw value
119 * DOC: color-management-caps
124 * abstracted HW. DCE 5-12 had almost no important changes, but starting with
131 * struct rom_curve_caps - predefined transfer function caps for degamma and regamma
147 * struct dpp_color_caps - color pipeline capabilities for display pipe and
152 * just plain 256-entry lookup
161 * @dgam_rom_for_yuv: pre-defined degamma LUT for YUV planes
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/openbmc/linux/drivers/gpu/drm/panel/
H A Dpanel-samsung-atna33xc20.c1 // SPDX-License-Identifier: GPL-2.0
6 * by the DRM_PANEL_SIMPLE driver because its power sequencing is non-standard.
22 /* T3 VCC to HPD high is max 200 ms */
72 if (p->el3_was_on) in atana33xc20_suspend()
73 atana33xc20_wait(p->el_on3_off_time, 150); in atana33xc20_suspend()
75 drm_dp_dpcd_set_powered(p->aux, false); in atana33xc20_suspend()
76 ret = regulator_disable(p->supply); in atana33xc20_suspend()
79 p->powered_off_time = ktime_get_boottime(); in atana33xc20_suspend()
80 p->el3_was_on = false; in atana33xc20_suspend()
92 atana33xc20_wait(p->powered_off_time, 500); in atana33xc20_resume()
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H A Dpanel-edp.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
46 * struct panel_delay - Describes delays for a simple panel.
50 * @hpd_reliable: Time for HPD to be reliable
53 * before the HPD signal is reliable. Ideally this is 0 but some panels,
57 * Presumably some old panels simply didn't have HPD hooked up and put
59 * hpd_absent. While that works, it's non-ideal.
64 * @hpd_absent: Time to wait if HPD isn't hooked up.
68 * This is T3-max on eDP timing diagrams or the delay from power on
69 * until HPD is guaranteed to be asserted.
87 * doesn't happen at the end of the function if a HPD GPIO was
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/openbmc/linux/drivers/gpu/drm/nouveau/
H A Dnouveau_dp.c16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
34 MODULE_PARM_DESC(mst, "Enable DisplayPort multi-stream (default: enabled)");
42 return drm_dp_read_sink_count_cap(connector, outp->dp.dpcd, &outp->dp.desc); in nouveau_dp_has_sink_count()
49 struct drm_connector *connector = &nv_connector->base; in nouveau_dp_probe_dpcd()
50 struct drm_dp_aux *aux = &nv_connector->aux; in nouveau_dp_probe_dpcd()
54 u8 *dpcd = outp->dp.dpcd; in nouveau_dp_probe_dpcd()
60 ret = drm_dp_read_desc(aux, &outp->dp.desc, drm_dp_is_branch(dpcd)); in nouveau_dp_probe_dpcd()
65 mstm = outp->dp.mstm; in nouveau_dp_probe_dpcd()
67 mstm->can_mst = drm_dp_read_mst_cap(aux, dpcd); in nouveau_dp_probe_dpcd()
75 outp->dp.sink_count = ret; in nouveau_dp_probe_dpcd()
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/openbmc/linux/Documentation/admin-guide/media/
H A Dcec.rst1 .. SPDX-License-Identifier: GPL-2.0
12 - Exynos4
13 - Exynos5
14 - STIH4xx HDMI CEC
15 - V4L2 adv7511 (same HW, but a different driver from the drm adv7511)
16 - stm32
17 - Allwinner A10 (sun4i)
18 - Raspberry Pi
19 - dw-hdmi (Synopsis IP)
20 - amlogic (meson ao-cec and ao-cec-g12a)
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/openbmc/linux/drivers/gpu/drm/radeon/
H A Dradeon_connectors.c2 * Copyright 2007-8 Advanced Micro Devices, Inc.
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
42 struct drm_device *dev = connector->dev; in radeon_connector_hotplug()
43 struct radeon_device *rdev = dev->dev_private; in radeon_connector_hotplug()
46 /* bail if the connector does not have hpd pin, e.g., in radeon_connector_hotplug()
49 if (radeon_connector->hpd.hpd == RADEON_HPD_NONE) in radeon_connector_hotplug()
52 radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd); in radeon_connector_hotplug()
56 if (connector->dpms != DRM_MODE_DPMS_ON) in radeon_connector_hotplug()
60 if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) { in radeon_connector_hotplug()
62 radeon_connector->con_priv; in radeon_connector_hotplug()
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H A Dradeon_combios.c3 * Copyright 2007-8 Advanced Micro Devices, Inc.
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
132 struct radeon_device *rdev = dev->dev_private; in combios_get_table_offset()
136 if (!rdev->bios) in combios_get_table_offset()
361 size = RBIOS8(rdev->bios_header_start + 0x6); in combios_get_table_offset()
364 offset = RBIOS16(rdev->bios_header_start + check_offset); in combios_get_table_offset()
378 raw = rdev->bios + edid_info; in radeon_combios_check_hardcoded_edid()
391 rdev->mode_info.bios_hardcoded_edid = edid; in radeon_combios_check_hardcoded_edid()
392 rdev->mode_info.bios_hardcoded_edid_size = size; in radeon_combios_check_hardcoded_edid()
402 if (rdev->mode_info.bios_hardcoded_edid) { in radeon_bios_get_hardcoded_edid()
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/dcn32/
H A Dhw_factory_dcn32.c16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
49 #define block HPD
111 // add a dummy entry for cases no such port
132 // add a dummy entry for cases no such port
196 generic->regs = &generic_regs[en]; in define_generic_registers()
197 generic->shifts = &generic_shift[en]; in define_generic_registers()
198 generic->masks = &generic_mask[en]; in define_generic_registers()
199 generic->base.regs = &generic_regs[en].gpio; in define_generic_registers()
208 switch (pin->id) { in define_ddc_registers()
210 ddc->regs = &ddc_data_regs_dcn[en]; in define_ddc_registers()
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/openbmc/linux/drivers/gpu/drm/
H A Ddrm_bridge_connector.c1 // SPDX-License-Identifier: GPL-2.0+
31 * with the DRM device. At that point the connector becomes fully usable, no
40 * operation flags (&drm_bridge->ops) and bridge output type
41 * (&drm_bridge->type), as well as the DRM_BRIDGE_ATTACH_NO_CONNECTOR attach
46 * struct drm_bridge_connector - A connector backed by a chain of bridges
70 * hot-plug detection notification, if any (see &DRM_BRIDGE_OP_HPD).
92 /* -----------------------------------------------------------------------------
93 * Bridge Connector Hot-Plug Handling
104 drm_for_each_bridge_in_chain(bridge_connector->encoder, bridge) { in drm_bridge_connector_hpd_notify()
105 if (bridge->funcs->hpd_notify) in drm_bridge_connector_hpd_notify()
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/openbmc/linux/drivers/gpu/drm/i915/display/
H A Dintel_hotplug.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 * handlers gather the hotplug detect (HPD) information from relevant registers
53 * pulses, with failures and non-MST long pulses triggering regular hotplug
66 * while before being re-enabled. The intention is to mitigate issues raising
72 * callback is handled by i915_digport_work_func reenabling of hpd is not
80 * intel_hpd_pin_default - return default pin associated with certain port.
82 * @port: the hpd port to get associated pin
91 return HPD_PORT_A + port - PORT_A; in intel_hpd_pin_default()
112 return encoder ? encoder->hpd_pin : HPD_NONE; in intel_connector_hpd_pin()
116 * intel_hpd_irq_storm_detect - gather stats and detect HPD IRQ storm on a pin
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/openbmc/linux/drivers/gpu/drm/bridge/
H A Ddisplay-connector.c1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/media-bus-format.h>
39 return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL; in display_connector_attach()
47 if (conn->hpd_gpio) { in display_connector_detect()
48 if (gpiod_get_value_cansleep(conn->hpd_gpio)) in display_connector_detect()
54 if (conn->bridge.ddc && drm_probe_ddc(conn->bridge.ddc)) in display_connector_detect()
57 switch (conn->bridge.type) { in display_connector_detect()
65 * that no cable is connected. in display_connector_detect()
74 * Composite and S-Video connectors have no other detection in display_connector_detect()
75 * mean than the HPD GPIO. For VGA connectors, even if we have in display_connector_detect()
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/openbmc/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_connectors.c2 * Copyright 2007-8 Advanced Micro Devices, Inc.
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
45 struct drm_device *dev = connector->dev; in amdgpu_connector_hotplug()
49 /* bail if the connector does not have hpd pin, e.g., in amdgpu_connector_hotplug()
52 if (amdgpu_connector->hpd.hpd == AMDGPU_HPD_NONE) in amdgpu_connector_hotplug()
55 amdgpu_display_hpd_set_polarity(adev, amdgpu_connector->hpd.hpd); in amdgpu_connector_hotplug()
58 if (connector->dpms != DRM_MODE_DPMS_ON) in amdgpu_connector_hotplug()
62 if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) { in amdgpu_connector_hotplug()
64 amdgpu_connector->con_priv; in amdgpu_connector_hotplug()
66 /* if existing sink type was not DP no need to retrain */ in amdgpu_connector_hotplug()
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/openbmc/linux/Documentation/devicetree/bindings/display/samsung/
H A Dsamsung,exynos-hdmi.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/display/samsung/samsung,exynos-hdmi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Inki Dae <inki.dae@samsung.com>
11 - Seung-Woo Kim <sw0312.kim@samsung.com>
12 - Kyungmin Park <kyungmin.park@samsung.com>
13 - Krzysztof Kozlowski <krzk@kernel.org>
18 - samsung,exynos4210-hdmi
19 - samsung,exynos4212-hdmi
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/dce120/
H A Dhw_factory_dce120.c2 * Copyright 2013-15 Advanced Micro Devices, Inc.
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
42 #define block HPD
135 switch (pin->id) { in define_ddc_registers()
137 ddc->regs = &ddc_data_regs[en]; in define_ddc_registers()
138 ddc->base.regs = &ddc_data_regs[en].gpio; in define_ddc_registers()
141 ddc->regs = &ddc_clk_regs[en]; in define_ddc_registers()
142 ddc->base.regs = &ddc_clk_regs[en].gpio; in define_ddc_registers()
149 ddc->shifts = &ddc_shift; in define_ddc_registers()
150 ddc->masks = &ddc_mask; in define_ddc_registers()
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/dce80/
H A Dhw_factory_dce80.c2 * Copyright 2012-15 Advanced Micro Devices, Inc.
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
122 switch (pin->id) { in define_ddc_registers()
124 ddc->regs = &ddc_data_regs[en]; in define_ddc_registers()
125 ddc->base.regs = &ddc_data_regs[en].gpio; in define_ddc_registers()
128 ddc->regs = &ddc_clk_regs[en]; in define_ddc_registers()
129 ddc->base.regs = &ddc_clk_regs[en].gpio; in define_ddc_registers()
136 ddc->shifts = &ddc_shift; in define_ddc_registers()
137 ddc->masks = &ddc_mask; in define_ddc_registers()
143 struct hw_hpd *hpd = HW_HPD_FROM_BASE(pin); in define_hpd_registers() local
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/dce60/
H A Dhw_factory_dce60.c16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
122 switch (pin->id) { in define_ddc_registers()
124 ddc->regs = &ddc_data_regs[en]; in define_ddc_registers()
125 ddc->base.regs = &ddc_data_regs[en].gpio; in define_ddc_registers()
128 ddc->regs = &ddc_clk_regs[en]; in define_ddc_registers()
129 ddc->base.regs = &ddc_clk_regs[en].gpio; in define_ddc_registers()
136 ddc->shifts = &ddc_shift; in define_ddc_registers()
137 ddc->masks = &ddc_mask; in define_ddc_registers()
143 struct hw_hpd *hpd = HW_HPD_FROM_BASE(pin); in define_hpd_registers() local
145 hpd->regs = &hpd_regs[en]; in define_hpd_registers()
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/openbmc/linux/drivers/gpu/drm/amd/display/dc/gpio/dcn10/
H A Dhw_factory_dcn10.c2 * Copyright 2013-15 Advanced Micro Devices, Inc.
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 #define block HPD
155 generic->regs = &generic_regs[en]; in define_generic_registers()
156 generic->shifts = &generic_shift[en]; in define_generic_registers()
157 generic->masks = &generic_mask[en]; in define_generic_registers()
158 generic->base.regs = &generic_regs[en].gpio; in define_generic_registers()
167 switch (pin->id) { in define_ddc_registers()
169 ddc->regs = &ddc_data_regs[en]; in define_ddc_registers()
170 ddc->base.regs = &ddc_data_regs[en].gpio; in define_ddc_registers()
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