From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0761C43331 for ; Tue, 12 Nov 2019 19:13:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8058F21783 for ; Tue, 12 Nov 2019 19:13:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Hh2dLWO5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727233AbfKLTNg (ORCPT ); Tue, 12 Nov 2019 14:13:36 -0500 Received: from mail-lj1-f195.google.com ([209.85.208.195]:36410 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725997AbfKLTNf (ORCPT ); Tue, 12 Nov 2019 14:13:35 -0500 Received: by mail-lj1-f195.google.com with SMTP id k15so19092778lja.3 for ; Tue, 12 Nov 2019 11:13:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=xYU8RezaDI6ajidPJOv1H6VYsk52jUBAXDy4eh684VE=; b=Hh2dLWO5+vSteQtqFWIzbI6s0zSU9HKKif6inBsRxsr6vP5LT4RZ47DJUqTNPTIjet whINeQ+ffnTWL0Yrtgd9JQSusguyD4ams6a9CMKWJ1dC3hqriQ4mkwe0dhLLpfwibupa a891fHA5P/jkosxmVncyS+f1RVEtGm+SfSlkui5Szm2ksLAX7bju5+m7yfCtvMFXOLBX esfUSr3cNDDHIxFJ3hxpY/wiyaqq/xv2cn5RFv7T64jtOVmNRnRJgrfACVI9lgUkou6d 63zddZahhq0Iib0v5X9KFl9aAj+92RDCQTZK3ZxHhCn8LnxhraqBNbEcQkLcxoMU/FFi N+Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=xYU8RezaDI6ajidPJOv1H6VYsk52jUBAXDy4eh684VE=; b=VR7xgoXV08RbcA2yvqUUSJGWhUciaFSI8rArEIvBcbvn2od5e84y7uTy8ZisgRA3bA v7nEgPTx/UEaMPTSclWqpLz2ut5KUbRY7e2/VMll69ngP8jRUmnVMrxnPYDhdTlPWkXQ gjT9LToxefgp6GL0drarKNb4WJ+dwH5FhPKG/ZcN4DO6rwxa2VT9TqqMvQ40bQaeTHyO D8MsszwdCPNTfswGv2Zvc46IcyXJFSKzMSCdjBF6lt3BjorZ0aRDSY57nE4W1PwhKpp5 cDdLY21BNFffndXD3EWQAHfXTIrjSnTqonMY9ZR67gYOk0Gff+Jphu8trIaF8mCGxA+K CAUQ== X-Gm-Message-State: APjAAAV/6EUNc0/efwyYuPdJ3pnIy5bg1bj3MpmxiOUXJ0fDbGIzPKs4 a1utkM8U7bNgf8Dzxxg/QEj3EjBsILexni8MDQPQWQ== X-Google-Smtp-Source: APXvYqxOeC9FqSaUIorRHFYdHOFIT7MTlj3qqhkVJrn3vrFoct1AF6auYZtzTtslAPZ9ouzqHORi+7Ef2sLPqny8r7A= X-Received: by 2002:a2e:9905:: with SMTP id v5mr21740230lji.213.1573586010851; Tue, 12 Nov 2019 11:13:30 -0800 (PST) MIME-Version: 1.0 References: <20191023001206.15741-1-rajatja@google.com> <20191104194147.185642-1-rajatja@google.com> <20191104194147.185642-3-rajatja@google.com> In-Reply-To: <20191104194147.185642-3-rajatja@google.com> From: Rajat Jain Date: Tue, 12 Nov 2019 11:12:54 -0800 Message-ID: Subject: Re: [PATCH v2 3/3] drm/i915: Add support for integrated privacy screens To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Chris Wilson , Imre Deak , =?UTF-8?Q?Jos=C3=A9_Roberto_de_Souza?= , Linux Kernel Mailing List , dri-devel , intel-gfx@lists.freedesktop.org, Greg Kroah-Hartman , Mat King , Daniel Thompson , Jonathan Corbet , Pavel Machek , Sean Paul , Duncan Laurie , Jesse Barnes , Thierry Reding Cc: Rajat Jain Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 4, 2019 at 11:41 AM Rajat Jain wrote: > > Certain laptops now come with panels that have integrated privacy > screens on them. This patch adds support for such panels by adding > a privacy-screen property to the intel_connector for the panel, that > the userspace can then use to control and check the status. > > Identifying the presence of privacy screen, and controlling it, is done > via ACPI _DSM methods. > > Currently, this is done only for the Intel display ports. But in future, > this can be done for any other ports if the hardware becomes available > (e.g. external monitors supporting integrated privacy screens?). > > Signed-off-by: Rajat Jain > Change-Id: Ic9ff07fc4a50797d2d0dfb919f11aa0821a4b548 Hi Folks, I posted a v2 taking care of the comments I received (also split it into 3 patches now, and resused some ACPI code I found in i915 driver). . Wondering if any one got a chance to look at this? Thanks, Rajat > --- > v2: Formed by splitting the original patch into multiple patches. > - All code has been moved into i915 now. > - Privacy screen is a i915 property > - Have a local state variable to store the prvacy screen. Don't read > it from hardware. > > drivers/gpu/drm/i915/Makefile | 3 +- > drivers/gpu/drm/i915/display/intel_atomic.c | 13 +++- > .../gpu/drm/i915/display/intel_connector.c | 35 ++++++++++ > .../gpu/drm/i915/display/intel_connector.h | 1 + > .../drm/i915/display/intel_display_types.h | 4 ++ > drivers/gpu/drm/i915/display/intel_dp.c | 5 ++ > .../drm/i915/display/intel_privacy_screen.c | 70 +++++++++++++++++++ > .../drm/i915/display/intel_privacy_screen.h | 25 +++++++ > include/uapi/drm/i915_drm.h | 14 ++++ > 9 files changed, 166 insertions(+), 4 deletions(-) > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h > > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefil= e > index 2587ea834f06..3589ebcf27bc 100644 > --- a/drivers/gpu/drm/i915/Makefile > +++ b/drivers/gpu/drm/i915/Makefile > @@ -185,7 +185,8 @@ i915-y +=3D \ > display/intel_tc.o > i915-$(CONFIG_ACPI) +=3D \ > display/intel_acpi.o \ > - display/intel_opregion.o > + display/intel_opregion.o \ > + display/intel_privacy_screen.o > i915-$(CONFIG_DRM_FBDEV_EMULATION) +=3D \ > display/intel_fbdev.o > > diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/dr= m/i915/display/intel_atomic.c > index d3fb75bb9eb1..378772d3449c 100644 > --- a/drivers/gpu/drm/i915/display/intel_atomic.c > +++ b/drivers/gpu/drm/i915/display/intel_atomic.c > @@ -37,6 +37,7 @@ > #include "intel_atomic.h" > #include "intel_display_types.h" > #include "intel_hdcp.h" > +#include "intel_privacy_screen.h" > #include "intel_sprite.h" > > /** > @@ -57,11 +58,14 @@ int intel_digital_connector_atomic_get_property(struc= t drm_connector *connector, > struct drm_i915_private *dev_priv =3D to_i915(dev); > struct intel_digital_connector_state *intel_conn_state =3D > to_intel_digital_connector_state(state); > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > > if (property =3D=3D dev_priv->force_audio_property) > *val =3D intel_conn_state->force_audio; > else if (property =3D=3D dev_priv->broadcast_rgb_property) > *val =3D intel_conn_state->broadcast_rgb; > + else if (property =3D=3D intel_connector->privacy_screen_property= ) > + *val =3D intel_conn_state->privacy_screen_status; > else { > DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n", > property->base.id, property->name); > @@ -89,15 +93,18 @@ int intel_digital_connector_atomic_set_property(struc= t drm_connector *connector, > struct drm_i915_private *dev_priv =3D to_i915(dev); > struct intel_digital_connector_state *intel_conn_state =3D > to_intel_digital_connector_state(state); > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > > if (property =3D=3D dev_priv->force_audio_property) { > intel_conn_state->force_audio =3D val; > return 0; > - } > - > - if (property =3D=3D dev_priv->broadcast_rgb_property) { > + } else if (property =3D=3D dev_priv->broadcast_rgb_property) { > intel_conn_state->broadcast_rgb =3D val; > return 0; > + } else if (property =3D=3D intel_connector->privacy_screen_proper= ty) { > + intel_privacy_screen_set_val(intel_connector, val); > + intel_conn_state->privacy_screen_status =3D val; > + return 0; > } > > DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n", > diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu= /drm/i915/display/intel_connector.c > index 308ec63207ee..3ccbf52aedf9 100644 > --- a/drivers/gpu/drm/i915/display/intel_connector.c > +++ b/drivers/gpu/drm/i915/display/intel_connector.c > @@ -281,3 +281,38 @@ intel_attach_colorspace_property(struct drm_connecto= r *connector) > drm_object_attach_property(&connector->base, > connector->colorspace_property= , 0); > } > + > +static const struct drm_prop_enum_list privacy_screen_enum[] =3D { > + { PRIVACY_SCREEN_DISABLED, "Disabled" }, > + { PRIVACY_SCREEN_ENABLED, "Enabled" }, > +}; > + > +/** > + * intel_attach_privacy_screen_property - > + * create and attach the connecter's privacy-screen property. * > + * @connector: connector for which to init the privacy-screen property > + * > + * This function creates and attaches the "privacy-screen" property to t= he > + * connector. Initial state of privacy-screen is set to disabled. > + */ > +void > +intel_attach_privacy_screen_property(struct drm_connector *connector) > +{ > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > + struct drm_property *prop; > + > + if (!intel_connector->privacy_screen_property) { > + prop =3D drm_property_create_enum(connector->dev, > + DRM_MODE_PROP_ENUM, > + "privacy-screen", > + privacy_screen_enum, > + ARRAY_SIZE(privacy_screen_enu= m)); > + if (!prop) > + return; > + > + intel_connector->privacy_screen_property =3D prop; > + } > + > + drm_object_attach_property(&connector->base, prop, > + PRIVACY_SCREEN_DISABLED); > +} > diff --git a/drivers/gpu/drm/i915/display/intel_connector.h b/drivers/gpu= /drm/i915/display/intel_connector.h > index 93a7375c8196..61005f37a338 100644 > --- a/drivers/gpu/drm/i915/display/intel_connector.h > +++ b/drivers/gpu/drm/i915/display/intel_connector.h > @@ -31,5 +31,6 @@ void intel_attach_force_audio_property(struct drm_conne= ctor *connector); > void intel_attach_broadcast_rgb_property(struct drm_connector *connector= ); > void intel_attach_aspect_ratio_property(struct drm_connector *connector)= ; > void intel_attach_colorspace_property(struct drm_connector *connector); > +void intel_attach_privacy_screen_property(struct drm_connector *connecto= r); > > #endif /* __INTEL_CONNECTOR_H__ */ > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers= /gpu/drm/i915/display/intel_display_types.h > index c2706afc069b..83b8c98049a7 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -426,6 +426,9 @@ struct intel_connector { > struct work_struct modeset_retry_work; > > struct intel_hdcp hdcp; > + > + /* Optional "privacy-screen" property for the connector panel */ > + struct drm_property *privacy_screen_property; > }; > > struct intel_digital_connector_state { > @@ -433,6 +436,7 @@ struct intel_digital_connector_state { > > enum hdmi_force_audio force_audio; > int broadcast_rgb; > + enum intel_privacy_screen_status privacy_screen_status; > }; > > #define to_intel_digital_connector_state(x) container_of(x, struct intel= _digital_connector_state, base) > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i9= 15/display/intel_dp.c > index 4fac408a4299..1963e92404ba 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -62,6 +62,7 @@ > #include "intel_lspcon.h" > #include "intel_lvds.h" > #include "intel_panel.h" > +#include "intel_privacy_screen.h" > #include "intel_psr.h" > #include "intel_sideband.h" > #include "intel_tc.h" > @@ -6358,6 +6359,10 @@ intel_dp_add_properties(struct intel_dp *intel_dp,= struct drm_connector *connect > > /* Lookup the ACPI node corresponding to the connector */ > intel_connector_lookup_acpi_node(intel_connector); > + > + /* Check for integrated Privacy screen support */ > + if (intel_privacy_screen_present(intel_connector)) > + intel_attach_privacy_screen_property(connector); > } > } > > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.c b/driver= s/gpu/drm/i915/display/intel_privacy_screen.c > new file mode 100644 > index 000000000000..4c422e38c51a > --- /dev/null > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.c > @@ -0,0 +1,70 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Intel ACPI privacy screen code > + * > + * Copyright =C2=A9 2019 Google Inc. > + */ > + > +#include > + > +#include "intel_privacy_screen.h" > + > +#define CONNECTOR_DSM_REVID 1 > + > +#define CONNECTOR_DSM_FN_PRIVACY_ENABLE 2 > +#define CONNECTOR_DSM_FN_PRIVACY_DISABLE 3 > + > +static const guid_t drm_conn_dsm_guid =3D > + GUID_INIT(0xC7033113, 0x8720, 0x4CEB, > + 0x90, 0x90, 0x9D, 0x52, 0xB3, 0xE5, 0x2D, 0x73); > + > +/* Makes _DSM call to set privacy screen status */ > +static void acpi_privacy_screen_call_dsm(acpi_handle conn_handle, u64 fu= nc) > +{ > + union acpi_object *obj; > + > + obj =3D acpi_evaluate_dsm(conn_handle, &drm_conn_dsm_guid, > + CONNECTOR_DSM_REVID, func, NULL); > + if (!obj) { > + DRM_DEBUG_DRIVER("failed to evaluate _DSM for fn %llx\n",= func); > + return; > + } > + > + ACPI_FREE(obj); > +} > + > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val) > +{ > + acpi_handle acpi_handle =3D intel_connector->acpi_handle; > + > + if (!acpi_handle) > + return; > + > + if (val =3D=3D PRIVACY_SCREEN_DISABLED) > + acpi_privacy_screen_call_dsm(acpi_handle, > + CONNECTOR_DSM_FN_PRIVACY_DIS= ABLE); > + else if (val =3D=3D PRIVACY_SCREEN_ENABLED) > + acpi_privacy_screen_call_dsm(acpi_handle, > + CONNECTOR_DSM_FN_PRIVACY_ENA= BLE); > +} > + > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r) > +{ > + acpi_handle handle =3D intel_connector->acpi_handle; > + > + if (!handle) > + return false; > + > + if (!acpi_check_dsm(handle, &drm_conn_dsm_guid, > + CONNECTOR_DSM_REVID, > + 1 << CONNECTOR_DSM_FN_PRIVACY_ENABLE | > + 1 << CONNECTOR_DSM_FN_PRIVACY_DISABLE)) { > + DRM_WARN("%s: Odd, connector ACPI node but no privacy scr= n?\n", > + dev_name(intel_connector->base.dev->dev)); > + return false; > + } > + DRM_DEV_INFO(intel_connector->base.dev->dev, > + "supports privacy screen\n"); > + return true; > +} > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.h b/driver= s/gpu/drm/i915/display/intel_privacy_screen.h > new file mode 100644 > index 000000000000..212f73349a00 > --- /dev/null > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.h > @@ -0,0 +1,25 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright =C2=A9 2019 Google Inc. > + */ > + > +#ifndef __DRM_PRIVACY_SCREEN_H__ > +#define __DRM_PRIVACY_SCREEN_H__ > + > +#include "intel_display_types.h" > + > +#ifdef CONFIG_ACPI > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r); > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val); > +#else > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r); > +{ > + return false; > +} > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val) > +{ } > +#endif /* CONFIG_ACPI */ > + > +#endif /* __DRM_PRIVACY_SCREEN_H__ */ > diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h > index 469dc512cca3..cf08d5636363 100644 > --- a/include/uapi/drm/i915_drm.h > +++ b/include/uapi/drm/i915_drm.h > @@ -2123,6 +2123,20 @@ struct drm_i915_query_engine_info { > struct drm_i915_engine_info engines[]; > }; > > +/** > + * enum intel_privacy_screen_status - privacy_screen status > + * > + * This enum is used to track and control the state of the integrated pr= ivacy > + * screen present on some display panels, via the "privacy-screen" prope= rty. > + * > + * @PRIVACY_SCREEN_DISABLED: The privacy-screen on the panel is disabled > + * @PRIVACY_SCREEN_ENABLED: The privacy-screen on the panel is enabled > + **/ > +enum intel_privacy_screen_status { > + PRIVACY_SCREEN_DISABLED =3D 0, > + PRIVACY_SCREEN_ENABLED =3D 1, > +}; > + > #if defined(__cplusplus) > } > #endif > -- > 2.24.0.rc1.363.gb1bccd3e3d-goog > From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rajat Jain Subject: Re: [PATCH v2 3/3] drm/i915: Add support for integrated privacy screens Date: Tue, 12 Nov 2019 11:12:54 -0800 Message-ID: References: <20191023001206.15741-1-rajatja@google.com> <20191104194147.185642-1-rajatja@google.com> <20191104194147.185642-3-rajatja@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20191104194147.185642-3-rajatja@google.com> Sender: linux-kernel-owner@vger.kernel.org To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Chris Wilson , Imre Deak , =?UTF-8?Q?Jos=C3=A9_Roberto_de_Souza?= , Linux Kernel Mailing List , dri-devel , intel-gfx@lists.freedesktop.org, Greg Kroah-Hartman , Mat King , Daniel Thompson Cc: Rajat Jain List-Id: dri-devel@lists.freedesktop.org On Mon, Nov 4, 2019 at 11:41 AM Rajat Jain wrote: > > Certain laptops now come with panels that have integrated privacy > screens on them. This patch adds support for such panels by adding > a privacy-screen property to the intel_connector for the panel, that > the userspace can then use to control and check the status. > > Identifying the presence of privacy screen, and controlling it, is done > via ACPI _DSM methods. > > Currently, this is done only for the Intel display ports. But in future, > this can be done for any other ports if the hardware becomes available > (e.g. external monitors supporting integrated privacy screens?). > > Signed-off-by: Rajat Jain > Change-Id: Ic9ff07fc4a50797d2d0dfb919f11aa0821a4b548 Hi Folks, I posted a v2 taking care of the comments I received (also split it into 3 patches now, and resused some ACPI code I found in i915 driver). . Wondering if any one got a chance to look at this? Thanks, Rajat > --- > v2: Formed by splitting the original patch into multiple patches. > - All code has been moved into i915 now. > - Privacy screen is a i915 property > - Have a local state variable to store the prvacy screen. Don't read > it from hardware. > > drivers/gpu/drm/i915/Makefile | 3 +- > drivers/gpu/drm/i915/display/intel_atomic.c | 13 +++- > .../gpu/drm/i915/display/intel_connector.c | 35 ++++++++++ > .../gpu/drm/i915/display/intel_connector.h | 1 + > .../drm/i915/display/intel_display_types.h | 4 ++ > drivers/gpu/drm/i915/display/intel_dp.c | 5 ++ > .../drm/i915/display/intel_privacy_screen.c | 70 +++++++++++++++++++ > .../drm/i915/display/intel_privacy_screen.h | 25 +++++++ > include/uapi/drm/i915_drm.h | 14 ++++ > 9 files changed, 166 insertions(+), 4 deletions(-) > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.c > create mode 100644 drivers/gpu/drm/i915/display/intel_privacy_screen.h > > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefil= e > index 2587ea834f06..3589ebcf27bc 100644 > --- a/drivers/gpu/drm/i915/Makefile > +++ b/drivers/gpu/drm/i915/Makefile > @@ -185,7 +185,8 @@ i915-y +=3D \ > display/intel_tc.o > i915-$(CONFIG_ACPI) +=3D \ > display/intel_acpi.o \ > - display/intel_opregion.o > + display/intel_opregion.o \ > + display/intel_privacy_screen.o > i915-$(CONFIG_DRM_FBDEV_EMULATION) +=3D \ > display/intel_fbdev.o > > diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/dr= m/i915/display/intel_atomic.c > index d3fb75bb9eb1..378772d3449c 100644 > --- a/drivers/gpu/drm/i915/display/intel_atomic.c > +++ b/drivers/gpu/drm/i915/display/intel_atomic.c > @@ -37,6 +37,7 @@ > #include "intel_atomic.h" > #include "intel_display_types.h" > #include "intel_hdcp.h" > +#include "intel_privacy_screen.h" > #include "intel_sprite.h" > > /** > @@ -57,11 +58,14 @@ int intel_digital_connector_atomic_get_property(struc= t drm_connector *connector, > struct drm_i915_private *dev_priv =3D to_i915(dev); > struct intel_digital_connector_state *intel_conn_state =3D > to_intel_digital_connector_state(state); > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > > if (property =3D=3D dev_priv->force_audio_property) > *val =3D intel_conn_state->force_audio; > else if (property =3D=3D dev_priv->broadcast_rgb_property) > *val =3D intel_conn_state->broadcast_rgb; > + else if (property =3D=3D intel_connector->privacy_screen_property= ) > + *val =3D intel_conn_state->privacy_screen_status; > else { > DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n", > property->base.id, property->name); > @@ -89,15 +93,18 @@ int intel_digital_connector_atomic_set_property(struc= t drm_connector *connector, > struct drm_i915_private *dev_priv =3D to_i915(dev); > struct intel_digital_connector_state *intel_conn_state =3D > to_intel_digital_connector_state(state); > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > > if (property =3D=3D dev_priv->force_audio_property) { > intel_conn_state->force_audio =3D val; > return 0; > - } > - > - if (property =3D=3D dev_priv->broadcast_rgb_property) { > + } else if (property =3D=3D dev_priv->broadcast_rgb_property) { > intel_conn_state->broadcast_rgb =3D val; > return 0; > + } else if (property =3D=3D intel_connector->privacy_screen_proper= ty) { > + intel_privacy_screen_set_val(intel_connector, val); > + intel_conn_state->privacy_screen_status =3D val; > + return 0; > } > > DRM_DEBUG_ATOMIC("Unknown property [PROP:%d:%s]\n", > diff --git a/drivers/gpu/drm/i915/display/intel_connector.c b/drivers/gpu= /drm/i915/display/intel_connector.c > index 308ec63207ee..3ccbf52aedf9 100644 > --- a/drivers/gpu/drm/i915/display/intel_connector.c > +++ b/drivers/gpu/drm/i915/display/intel_connector.c > @@ -281,3 +281,38 @@ intel_attach_colorspace_property(struct drm_connecto= r *connector) > drm_object_attach_property(&connector->base, > connector->colorspace_property= , 0); > } > + > +static const struct drm_prop_enum_list privacy_screen_enum[] =3D { > + { PRIVACY_SCREEN_DISABLED, "Disabled" }, > + { PRIVACY_SCREEN_ENABLED, "Enabled" }, > +}; > + > +/** > + * intel_attach_privacy_screen_property - > + * create and attach the connecter's privacy-screen property. * > + * @connector: connector for which to init the privacy-screen property > + * > + * This function creates and attaches the "privacy-screen" property to t= he > + * connector. Initial state of privacy-screen is set to disabled. > + */ > +void > +intel_attach_privacy_screen_property(struct drm_connector *connector) > +{ > + struct intel_connector *intel_connector =3D to_intel_connector(co= nnector); > + struct drm_property *prop; > + > + if (!intel_connector->privacy_screen_property) { > + prop =3D drm_property_create_enum(connector->dev, > + DRM_MODE_PROP_ENUM, > + "privacy-screen", > + privacy_screen_enum, > + ARRAY_SIZE(privacy_screen_enu= m)); > + if (!prop) > + return; > + > + intel_connector->privacy_screen_property =3D prop; > + } > + > + drm_object_attach_property(&connector->base, prop, > + PRIVACY_SCREEN_DISABLED); > +} > diff --git a/drivers/gpu/drm/i915/display/intel_connector.h b/drivers/gpu= /drm/i915/display/intel_connector.h > index 93a7375c8196..61005f37a338 100644 > --- a/drivers/gpu/drm/i915/display/intel_connector.h > +++ b/drivers/gpu/drm/i915/display/intel_connector.h > @@ -31,5 +31,6 @@ void intel_attach_force_audio_property(struct drm_conne= ctor *connector); > void intel_attach_broadcast_rgb_property(struct drm_connector *connector= ); > void intel_attach_aspect_ratio_property(struct drm_connector *connector)= ; > void intel_attach_colorspace_property(struct drm_connector *connector); > +void intel_attach_privacy_screen_property(struct drm_connector *connecto= r); > > #endif /* __INTEL_CONNECTOR_H__ */ > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers= /gpu/drm/i915/display/intel_display_types.h > index c2706afc069b..83b8c98049a7 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -426,6 +426,9 @@ struct intel_connector { > struct work_struct modeset_retry_work; > > struct intel_hdcp hdcp; > + > + /* Optional "privacy-screen" property for the connector panel */ > + struct drm_property *privacy_screen_property; > }; > > struct intel_digital_connector_state { > @@ -433,6 +436,7 @@ struct intel_digital_connector_state { > > enum hdmi_force_audio force_audio; > int broadcast_rgb; > + enum intel_privacy_screen_status privacy_screen_status; > }; > > #define to_intel_digital_connector_state(x) container_of(x, struct intel= _digital_connector_state, base) > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i9= 15/display/intel_dp.c > index 4fac408a4299..1963e92404ba 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > @@ -62,6 +62,7 @@ > #include "intel_lspcon.h" > #include "intel_lvds.h" > #include "intel_panel.h" > +#include "intel_privacy_screen.h" > #include "intel_psr.h" > #include "intel_sideband.h" > #include "intel_tc.h" > @@ -6358,6 +6359,10 @@ intel_dp_add_properties(struct intel_dp *intel_dp,= struct drm_connector *connect > > /* Lookup the ACPI node corresponding to the connector */ > intel_connector_lookup_acpi_node(intel_connector); > + > + /* Check for integrated Privacy screen support */ > + if (intel_privacy_screen_present(intel_connector)) > + intel_attach_privacy_screen_property(connector); > } > } > > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.c b/driver= s/gpu/drm/i915/display/intel_privacy_screen.c > new file mode 100644 > index 000000000000..4c422e38c51a > --- /dev/null > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.c > @@ -0,0 +1,70 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Intel ACPI privacy screen code > + * > + * Copyright =C2=A9 2019 Google Inc. > + */ > + > +#include > + > +#include "intel_privacy_screen.h" > + > +#define CONNECTOR_DSM_REVID 1 > + > +#define CONNECTOR_DSM_FN_PRIVACY_ENABLE 2 > +#define CONNECTOR_DSM_FN_PRIVACY_DISABLE 3 > + > +static const guid_t drm_conn_dsm_guid =3D > + GUID_INIT(0xC7033113, 0x8720, 0x4CEB, > + 0x90, 0x90, 0x9D, 0x52, 0xB3, 0xE5, 0x2D, 0x73); > + > +/* Makes _DSM call to set privacy screen status */ > +static void acpi_privacy_screen_call_dsm(acpi_handle conn_handle, u64 fu= nc) > +{ > + union acpi_object *obj; > + > + obj =3D acpi_evaluate_dsm(conn_handle, &drm_conn_dsm_guid, > + CONNECTOR_DSM_REVID, func, NULL); > + if (!obj) { > + DRM_DEBUG_DRIVER("failed to evaluate _DSM for fn %llx\n",= func); > + return; > + } > + > + ACPI_FREE(obj); > +} > + > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val) > +{ > + acpi_handle acpi_handle =3D intel_connector->acpi_handle; > + > + if (!acpi_handle) > + return; > + > + if (val =3D=3D PRIVACY_SCREEN_DISABLED) > + acpi_privacy_screen_call_dsm(acpi_handle, > + CONNECTOR_DSM_FN_PRIVACY_DIS= ABLE); > + else if (val =3D=3D PRIVACY_SCREEN_ENABLED) > + acpi_privacy_screen_call_dsm(acpi_handle, > + CONNECTOR_DSM_FN_PRIVACY_ENA= BLE); > +} > + > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r) > +{ > + acpi_handle handle =3D intel_connector->acpi_handle; > + > + if (!handle) > + return false; > + > + if (!acpi_check_dsm(handle, &drm_conn_dsm_guid, > + CONNECTOR_DSM_REVID, > + 1 << CONNECTOR_DSM_FN_PRIVACY_ENABLE | > + 1 << CONNECTOR_DSM_FN_PRIVACY_DISABLE)) { > + DRM_WARN("%s: Odd, connector ACPI node but no privacy scr= n?\n", > + dev_name(intel_connector->base.dev->dev)); > + return false; > + } > + DRM_DEV_INFO(intel_connector->base.dev->dev, > + "supports privacy screen\n"); > + return true; > +} > diff --git a/drivers/gpu/drm/i915/display/intel_privacy_screen.h b/driver= s/gpu/drm/i915/display/intel_privacy_screen.h > new file mode 100644 > index 000000000000..212f73349a00 > --- /dev/null > +++ b/drivers/gpu/drm/i915/display/intel_privacy_screen.h > @@ -0,0 +1,25 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * Copyright =C2=A9 2019 Google Inc. > + */ > + > +#ifndef __DRM_PRIVACY_SCREEN_H__ > +#define __DRM_PRIVACY_SCREEN_H__ > + > +#include "intel_display_types.h" > + > +#ifdef CONFIG_ACPI > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r); > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val); > +#else > +bool intel_privacy_screen_present(struct intel_connector *intel_connecto= r); > +{ > + return false; > +} > +void intel_privacy_screen_set_val(struct intel_connector *intel_connecto= r, > + enum intel_privacy_screen_status val) > +{ } > +#endif /* CONFIG_ACPI */ > + > +#endif /* __DRM_PRIVACY_SCREEN_H__ */ > diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h > index 469dc512cca3..cf08d5636363 100644 > --- a/include/uapi/drm/i915_drm.h > +++ b/include/uapi/drm/i915_drm.h > @@ -2123,6 +2123,20 @@ struct drm_i915_query_engine_info { > struct drm_i915_engine_info engines[]; > }; > > +/** > + * enum intel_privacy_screen_status - privacy_screen status > + * > + * This enum is used to track and control the state of the integrated pr= ivacy > + * screen present on some display panels, via the "privacy-screen" prope= rty. > + * > + * @PRIVACY_SCREEN_DISABLED: The privacy-screen on the panel is disabled > + * @PRIVACY_SCREEN_ENABLED: The privacy-screen on the panel is enabled > + **/ > +enum intel_privacy_screen_status { > + PRIVACY_SCREEN_DISABLED =3D 0, > + PRIVACY_SCREEN_ENABLED =3D 1, > +}; > + > #if defined(__cplusplus) > } > #endif > -- > 2.24.0.rc1.363.gb1bccd3e3d-goog > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F378C17442 for ; Wed, 13 Nov 2019 07:56:44 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) 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<20191104194147.185642-1-rajatja@google.com> <20191104194147.185642-3-rajatja@google.com> In-Reply-To: <20191104194147.185642-3-rajatja@google.com> From: Rajat Jain Date: Tue, 12 Nov 2019 11:12:54 -0800 Message-ID: Subject: Re: [PATCH v2 3/3] drm/i915: Add support for integrated privacy screens To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Chris Wilson , Imre Deak , =?UTF-8?Q?Jos=C3=A9_Roberto_de_Souza?= , Linux Kernel Mailing List , dri-devel , intel-gfx@lists.freedesktop.org, Greg Kroah-Hartman , Mat King , Daniel Thompson , Jonathan Corbet , Pavel Machek , Sean Paul , Duncan Laurie , Jesse Barnes , Thierry Reding X-Mailman-Approved-At: Wed, 13 Nov 2019 07:55:45 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; 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<20191104194147.185642-1-rajatja@google.com> <20191104194147.185642-3-rajatja@google.com> In-Reply-To: <20191104194147.185642-3-rajatja@google.com> From: Rajat Jain Date: Tue, 12 Nov 2019 11:12:54 -0800 Message-ID: To: Maarten Lankhorst , Maxime Ripard , Sean Paul , David Airlie , Daniel Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= , Chris Wilson , Imre Deak , =?UTF-8?Q?Jos=C3=A9_Roberto_de_Souza?= , Linux Kernel Mailing List , dri-devel , intel-gfx@lists.freedesktop.org, Greg Kroah-Hartman , Mat King , Daniel Thompson , Jonathan Corbet , Pavel Machek , Sean Paul , Duncan Laurie , Jesse Barnes , Thierry Reding X-Mailman-Approved-At: Tue, 12 Nov 2019 20:35:58 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=xYU8RezaDI6ajidPJOv1H6VYsk52jUBAXDy4eh684VE=; b=Hh2dLWO5+vSteQtqFWIzbI6s0zSU9HKKif6inBsRxsr6vP5LT4RZ47DJUqTNPTIjet whINeQ+ffnTWL0Yrtgd9JQSusguyD4ams6a9CMKWJ1dC3hqriQ4mkwe0dhLLpfwibupa a891fHA5P/jkosxmVncyS+f1RVEtGm+SfSlkui5Szm2ksLAX7bju5+m7yfCtvMFXOLBX esfUSr3cNDDHIxFJ3hxpY/wiyaqq/xv2cn5RFv7T64jtOVmNRnRJgrfACVI9lgUkou6d 63zddZahhq0Iib0v5X9KFl9aAj+92RDCQTZK3ZxHhCn8LnxhraqBNbEcQkLcxoMU/FFi N+Uw== Subject: Re: [Intel-gfx] [PATCH v2 3/3] drm/i915: Add support for integrated privacy screens X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rajat Jain Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Message-ID: <20191112191254.7JKd_0JlBY6vo6Yvd0cV-YjKhqFwFERXwvkan0CVk48@z> T24gTW9uLCBOb3YgNCwgMjAxOSBhdCAxMTo0MSBBTSBSYWphdCBKYWluIDxyYWphdGphQGdvb2ds 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