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[90.8.156.65]) by smtp.gmail.com with ESMTPSA id n14sm14122682wmi.26.2020.01.13.07.19.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Jan 2020 07:19:03 -0800 (PST) Subject: Re: [PATCH v2 3/3] media: platform: meson-ao-cec-g12a: add wakeup support To: Hans Verkuil , narmstrong@baylibre.com, mchehab@kernel.org, khilman@baylibre.com, devicetree@vger.kernel.org Cc: linux-media@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20191213132956.11074-1-glaroque@baylibre.com> <20191213132956.11074-4-glaroque@baylibre.com> <0a07b5cc-a7dc-2983-89de-a1894ae6a469@baylibre.com> <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> From: guillaume La Roque Message-ID: Date: Mon, 13 Jan 2020 16:19:02 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/13/20 2:30 PM, Hans Verkuil wrote: > On 1/10/20 4:06 PM, guillaume La Roque wrote: >> Hi Hans, >> >> On 1/7/20 3:36 PM, Hans Verkuil wrote: >>> Hi Guillaume, >>> >>> On 12/13/19 2:29 PM, Guillaume La Roque wrote: >>>> add register configuration to activate wakeup feature in bl301 >>>> >>>> Tested-by: Kevin Hilman >>>> Signed-off-by: Guillaume La Roque >>>> --- >>>> drivers/media/platform/meson/ao-cec-g12a.c | 33 ++++++++++++++++++++++ >>>> 1 file changed, 33 insertions(+) >>>> >>>> diff --git a/drivers/media/platform/meson/ao-cec-g12a.c b/drivers/media/platform/meson/ao-cec-g12a.c >>>> index 891533060d49..85850b974126 100644 >>>> --- a/drivers/media/platform/meson/ao-cec-g12a.c >>>> +++ b/drivers/media/platform/meson/ao-cec-g12a.c >>>> @@ -25,6 +25,7 @@ >>>> #include >>>> #include >>>> #include >>>> +#include >>>> >>>> /* CEC Registers */ >>>> >>>> @@ -168,6 +169,18 @@ >>>> >>>> #define CECB_WAKEUPCTRL 0x31 >>>> >>>> +#define CECB_FUNC_CFG_REG 0xA0 >>>> +#define CECB_FUNC_CFG_MASK GENMASK(6, 0) >>>> +#define CECB_FUNC_CFG_CEC_ON 0x01 >>>> +#define CECB_FUNC_CFG_OTP_ON 0x02 >>>> +#define CECB_FUNC_CFG_AUTO_STANDBY 0x04 >>>> +#define CECB_FUNC_CFG_AUTO_POWER_ON 0x08 >>>> +#define CECB_FUNC_CFG_ALL 0x2f >>>> +#define CECB_FUNC_CFG_NONE 0x0 >>>> + >>>> +#define CECB_LOG_ADDR_REG 0xA4 >>>> +#define CECB_LOG_ADDR_MASK GENMASK(22, 16) >>>> + >>>> struct meson_ao_cec_g12a_data { >>>> /* Setup the internal CECB_CTRL2 register */ >>>> bool ctrl2_setup; >>>> @@ -177,6 +190,7 @@ struct meson_ao_cec_g12a_device { >>>> struct platform_device *pdev; >>>> struct regmap *regmap; >>>> struct regmap *regmap_cec; >>>> + struct regmap *regmap_ao_sysctrl; >>>> spinlock_t cec_reg_lock; >>>> struct cec_notifier *notify; >>>> struct cec_adapter *adap; >>>> @@ -518,6 +532,13 @@ meson_ao_cec_g12a_set_log_addr(struct cec_adapter *adap, u8 logical_addr) >>>> BIT(logical_addr - 8)); >>>> } >>>> >>>> + if (ao_cec->regmap_ao_sysctrl) >>>> + ret |= regmap_update_bits(ao_cec->regmap_ao_sysctrl, >>>> + CECB_LOG_ADDR_REG, >>>> + CECB_LOG_ADDR_MASK, >>>> + FIELD_PREP(CECB_LOG_ADDR_MASK, >>>> + logical_addr)); >>>> + >>>> /* Always set Broadcast/Unregistered 15 address */ >>>> ret |= regmap_update_bits(ao_cec->regmap_cec, CECB_LADD_HIGH, >>>> BIT(CEC_LOG_ADDR_UNREGISTERED - 8), >>>> @@ -618,6 +639,13 @@ static int meson_ao_cec_g12a_adap_enable(struct cec_adapter *adap, bool enable) >>>> regmap_write(ao_cec->regmap_cec, CECB_CTRL2, >>>> FIELD_PREP(CECB_CTRL2_RISE_DEL_MAX, 2)); >>>> >>>> + if (ao_cec->regmap_ao_sysctrl) { >>>> + regmap_update_bits(ao_cec->regmap_ao_sysctrl, >>>> + CECB_FUNC_CFG_REG, >>>> + CECB_FUNC_CFG_MASK, >>>> + CECB_FUNC_CFG_ALL); >>> What exactly is enabled here? Looking at CECB_FUNC_CFG_ALL it seems to >>> enable automatic standby (I presume when the STANDBY message is received?) >>> and power on (I presume when SET_STREAM_PATH is received?). >> this register and flags are used by bl301 part. >> >> amlogic implemented a task to check cec event/message. >> >> for power on in bl301 it's not only on SET_STREAM_PATH but also on : >> >> USER_CONTROL_PRESSED >> TEXT_VIEW_ON > Not IMAGE_VIEW_ON? sorry i forgot it , yes on IMAGE_VIEW_ON too > >> ACTIVE_SOURCE >> ROUTING_CHANGE >> >> when in CECB_FUNC_CFG_REG register we put  CECB_FUNC_CFG_CEC_ON and  CECB_FUNC_CFG_AUTO_POWER_ON >> >> it's not possible to change this > Too bad since ACTIVE_SOURCE and ROUTING_CHANGE should not power on a CEC device. > > See section 11.5.2 in the HDMI 2.0 Specification for more details, if you have > that spec. i will return your comment to amlogic but not sure they do change in bl301. > >>> Do you really want to automatically handle STANDBY that way? What does this >>> do on the hardware level anyway? Isn't this something that should be >>> controlled in userspace? >> in fact i do a new check in bl301 code amlogic do nothing on STANDBY so i will clean code >> >> and activate real option supported by bl301 >> >>> Similar questions for power on: you may not always want to enable this feature >>> since it depends very much on the precise use-case. >>> >>> And which messages it reacts to in order to do a power-on needs to be >>> documented since this differs depending on whether the CEC adapter is >>> used for a TV or for a playback device. This feature may be hardwired for >>> a playback device only, in which case it should probably be disabled if >>> the CEC adapter is configured as a TV. >>> >>> In any case I would like to see some more details about how this works, >>> especially since this is the first implementation of such a feature. >>> >>> I suspect that some userspace API might be needed to get the right level >>> of control of such a feature. >> i will send v3 next week with some comments and fix ( disable are missing for example) >> >> actual usercase is for android TV. >> >> when cec was enable android TV want to be wakeup by cec event. >> >> >>> Regards, >>> >>> Hans >>> >> thanks for your review > No problem! > > Hans > >> Regards >> >> Guillaume >> >>>> + } >>>> + >>>> meson_ao_cec_g12a_irq_setup(ao_cec, true); >>>> >>>> return 0; >>>> @@ -685,6 +713,11 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev) >>>> goto out_probe_adapter; >>>> } >>>> >>>> + ao_cec->regmap_ao_sysctrl = syscon_regmap_lookup_by_phandle >>>> + (pdev->dev.of_node, "amlogic,ao-sysctrl"); >>>> + if (IS_ERR(ao_cec->regmap_ao_sysctrl)) >>>> + dev_warn(&pdev->dev, "ao-sysctrl syscon regmap lookup failed.\n"); >>>> + >>>> irq = platform_get_irq(pdev, 0); >>>> ret = devm_request_threaded_irq(&pdev->dev, irq, >>>> meson_ao_cec_g12a_irq, >>>> Regards Guillaume 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=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 E0B1BC33CA9 for ; Mon, 13 Jan 2020 15:19:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B102C21569 for ; 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[90.8.156.65]) by smtp.gmail.com with ESMTPSA id n14sm14122682wmi.26.2020.01.13.07.19.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Jan 2020 07:19:03 -0800 (PST) Subject: Re: [PATCH v2 3/3] media: platform: meson-ao-cec-g12a: add wakeup support To: Hans Verkuil , narmstrong@baylibre.com, mchehab@kernel.org, khilman@baylibre.com, devicetree@vger.kernel.org References: <20191213132956.11074-1-glaroque@baylibre.com> <20191213132956.11074-4-glaroque@baylibre.com> <0a07b5cc-a7dc-2983-89de-a1894ae6a469@baylibre.com> <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> From: guillaume La Roque Message-ID: Date: Mon, 13 Jan 2020 16:19:02 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_071906_831373_CD87D7A5 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[90.8.156.65]) by smtp.gmail.com with ESMTPSA id n14sm14122682wmi.26.2020.01.13.07.19.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Jan 2020 07:19:03 -0800 (PST) Subject: Re: [PATCH v2 3/3] media: platform: meson-ao-cec-g12a: add wakeup support To: Hans Verkuil , narmstrong@baylibre.com, mchehab@kernel.org, khilman@baylibre.com, devicetree@vger.kernel.org References: <20191213132956.11074-1-glaroque@baylibre.com> <20191213132956.11074-4-glaroque@baylibre.com> <0a07b5cc-a7dc-2983-89de-a1894ae6a469@baylibre.com> <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> From: guillaume La Roque Message-ID: Date: Mon, 13 Jan 2020 16:19:02 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <75278f35-c4c2-90bc-cc54-8c3b5bbdd7e1@xs4all.nl> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200113_071907_108185_26C6B67A X-CRM114-Status: GOOD ( 20.67 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Ck9uIDEvMTMvMjAgMjozMCBQTSwgSGFucyBWZXJrdWlsIHdyb3RlOgo+IE9uIDEvMTAvMjAgNDow NiBQTSwgZ3VpbGxhdW1lIExhIFJvcXVlIHdyb3RlOgo+PiBIaSBIYW5zLAo+Pgo+PiBPbiAxLzcv MjAgMzozNiBQTSwgSGFucyBWZXJrdWlsIHdyb3RlOgo+Pj4gSGkgR3VpbGxhdW1lLAo+Pj4KPj4+ IE9uIDEyLzEzLzE5IDI6MjkgUE0sIEd1aWxsYXVtZSBMYSBSb3F1ZSB3cm90ZToKPj4+PiBhZGQg cmVnaXN0ZXIgY29uZmlndXJhdGlvbiB0byBhY3RpdmF0ZSB3YWtldXAgZmVhdHVyZSBpbiBibDMw MQo+Pj4+Cj4+Pj4gVGVzdGVkLWJ5OiBLZXZpbiBIaWxtYW4gPGtoaWxtYW5AYmF5bGlicmUuY29t 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