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Wed, 1 Jul 2020 16:47:42 +0800 Message-ID: <1593593242.17166.48.camel@mhfsdcap03> Subject: Re: [PATCH V11 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver From: Dongchun Zhu To: Sakari Ailus CC: Tomasz Figa , , , , , , , , , , , , , , , , , , Date: Wed, 1 Jul 2020 16:47:22 +0800 In-Reply-To: <20200630184702.GH16711@paasikivi.fi.intel.com> References: <20200630024942.20891-1-dongchun.zhu@mediatek.com> <20200630024942.20891-3-dongchun.zhu@mediatek.com> <20200630170746.GD1212092@chromium.org> <20200630184702.GH16711@paasikivi.fi.intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: B41849E7468EBFC9B60FC92E7E7E845B75FAEEA141398C78B5F99E380EA612E52000:8 X-MTK: N Content-Transfer-Encoding: base64 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org SGkgVG9tYXN6LCBTYWthcmksDQoNClRoYW5rcyBmb3IgdGhlIHJldmlldy4NCg0KT24gVHVlLCAy MDIwLTA2LTMwIGF0IDIxOjQ3ICswMzAwLCBTYWthcmkgQWlsdXMgd3JvdGU6DQo+IE9uIFR1ZSwg SnVuIDMwLCAyMDIwIGF0IDA1OjA3OjQ2UE0gKzAwMDAsIFRvbWFzeiBGaWdhIHdyb3RlOg0KPiA+ IEhpIERvbmdjaHVuLA0KPiA+IA0KPiA+IE9uIFR1ZSwgSnVuIDMwLCAyMDIwIGF0IDEwOjQ5OjQy QU0gKzA4MDAsIERvbmdjaHVuIFpodSB3cm90ZToNCj4gPiA+IEFkZCBhIFY0TDIgc3ViLWRldmlj ZSBkcml2ZXIgZm9yIE9WMDJBMTAgaW1hZ2Ugc2Vuc29yLg0KPiA+ID4gDQo+ID4gPiBTaWduZWQt b2ZmLWJ5OiBEb25nY2h1biBaaHUgPGRvbmdjaHVuLnpodUBtZWRpYXRlay5jb20+DQo+ID4gPiAt LS0NCj4gPiA+ICBNQUlOVEFJTkVSUyAgICAgICAgICAgICAgICAgfCAgICAxICsNCj4gPiA+ICBk cml2ZXJzL21lZGlhL2kyYy9LY29uZmlnICAgfCAgIDEzICsNCj4gPiA+ICBkcml2ZXJzL21lZGlh L2kyYy9NYWtlZmlsZSAgfCAgICAxICsNCj4gPiA+ICBkcml2ZXJzL21lZGlhL2kyYy9vdjAyYTEw LmMgfCAxMDUyICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysNCj4g PiA+ICA0IGZpbGVzIGNoYW5nZWQsIDEwNjcgaW5zZXJ0aW9ucygrKQ0KPiA+ID4gIGNyZWF0ZSBt b2RlIDEwMDY0NCBkcml2ZXJzL21lZGlhL2kyYy9vdjAyYTEwLmMNCj4gPiANCj4gPiBUaGFuayB5 b3UgZm9yIHRoZSBwYXRjaC4gUGxlYXNlIHNlZSBteSBjb21tZW50cyBpbmxpbmUuDQo+ID4gDQo+ ID4gW3NuaXBdDQo+ID4gPiArc3RhdGljIGludCBvdjAyYTEwX2VudGl0eV9pbml0X2NmZyhzdHJ1 Y3QgdjRsMl9zdWJkZXYgKnNkLA0KPiA+ID4gKwkJCQkgICBzdHJ1Y3QgdjRsMl9zdWJkZXZfcGFk X2NvbmZpZyAqY2ZnKQ0KPiA+ID4gK3sNCj4gPiA+ICsJc3RydWN0IHY0bDJfc3ViZGV2X2Zvcm1h dCBmbXQgPSB7DQo+ID4gPiArCQkud2hpY2ggPSBjZmcgPyBWNEwyX1NVQkRFVl9GT1JNQVRfVFJZ IDogVjRMMl9TVUJERVZfRk9STUFUX0FDVElWRSwNCj4gPiANCj4gPiBBcyB3ZSBkaXNjdXNzZWQg YmVmb3JlLCB0aGlzIGZ1bmN0aW9uIGlzIG5ldmVyIGNhbGxlZCB3aXRoIGNmZyA9PSBOVUxMLg0K PiA+IFBlcmhhcHMgd2hhdCB3ZSBuZWVkIGhlcmUgaXMgdG8gY2FsbCBvdjAyYTEwX3NldF9mbXQo KSB0d2ljZSwgb25jZSBmb3INCj4gPiBWNEwyX1NVQkRFVl9GT1JNQVRfQUNUSVZFIGFuZCB0aGVu IGZvciBWNEwyX1NVQkRFVl9GT1JNQVRfVFJZPw0KPiA+IA0KPiA+IFNha2FyaSwgd291bGQgdGhh dCBiZSBhIHByb3BlciBpbXBsZW1lbnRhdGlvbiBvZiB0aGlzIGZ1bmN0aW9uPw0KPiANCj4gSXQn cyBmaW5lIHRvIHRlc3QgZm10LCBidXQgaXQgc2hvdWxkIGJlIG9ubHkgZG9uZSBpZiB0aGUgZHJp dmVyIGNhbGxzIHRoZQ0KPiBmdW5jdGlvbiB3aXRoIEFDVElWRSBmb3JtYXQuIEkuZS4gaXQgY2Fu IGJlIHJlbW92ZWQgaGVyZSwgYW5kIGFsd2F5cyB1c2UNCj4gVFJZLg0KPiANCg0KU29ycnkgZm9y IG15IGxhdGUgY29taW5nLg0KVGhlIGltcGxlbWVudGF0aW9uIG9mIHRoaXMgZnVuY3Rpb24gc2hv dWxkIGJlIGNvbW1vbihzaW1pbGFyIHRvDQpPVjI2ODAvT1Y1NjQ1KS4NCklmIGl0IG5lZWRzIHRv IHVwZGF0ZSB0byBiZSBtb3JlIHByb3BlciBvciBjbGVhciwgYXMgdXNlciBhbHdheXMgc2V0cw0K Zm9ybWF0LndoaWNoIHRvIEFDVElWRSB3aGVuIGNhbGxpbmcgc2V0X2ZtdCwgd2UgY291bGQgb25s eSByZXNlcnZlIHRoZQ0KVFJZIGZvcm1hdCBpbiBpbml0X2NmZyBsaWtlIHRoaXM6DQpzdHJ1Y3Qg djRsMl9zdWJkZXZfZm9ybWF0IGZtdCA9IHsNCgl3aGljaCA9IFY0TDJfU1VCREVWX0ZPUk1BVF9U UlksDQoNCj4gPiANCj4gPiA+ICsJCS5mb3JtYXQgPSB7DQo+ID4gPiArCQkJLndpZHRoID0gMTYw MCwNCj4gPiA+ICsJCQkuaGVpZ2h0ID0gMTIwMCwNCj4gPiA+ICsJCX0NCj4gPiA+ICsJfTsNCj4g PiA+ICsNCj4gPiA+ICsJb3YwMmExMF9zZXRfZm10KHNkLCBjZmcsICZmbXQpOw0KPiA+ID4gKw0K PiA+ID4gKwlyZXR1cm4gMDsNCj4gPiBbc25pcF0NCj4gPiANCj4gPiBXaXRoIHRoaXMgYW5kIFNh a2FyaSdzIGNvbW1lbnQgYWJvdXQgdGhlIGluaXRpYWwgc3RhdGUgb2YgdGhlIHJlc2V0IHBpbg0K PiA+IGZpeGVkLCBmZWVsIGZyZWUgdG8gYWRkIG15DQo+ID4gDQo+ID4gUmV2aWV3ZWQtYnk6IFRv bWFzeiBGaWdhIDx0ZmlnYUBjaHJvbWl1bS5vcmc+DQo+ID4gDQo+ID4gQmVzdCByZWdhcmRzLA0K PiA+IFRvbWFzeg0KPiANCg0K 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=-5.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_SANE_2 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 4A242C433DF for ; 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Wed, 1 Jul 2020 16:47:45 +0800 Received: from [10.17.3.153] (10.17.3.153) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 1 Jul 2020 16:47:42 +0800 Message-ID: <1593593242.17166.48.camel@mhfsdcap03> Subject: Re: [PATCH V11 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver From: Dongchun Zhu To: Sakari Ailus Date: Wed, 1 Jul 2020 16:47:22 +0800 In-Reply-To: <20200630184702.GH16711@paasikivi.fi.intel.com> References: <20200630024942.20891-1-dongchun.zhu@mediatek.com> <20200630024942.20891-3-dongchun.zhu@mediatek.com> <20200630170746.GD1212092@chromium.org> <20200630184702.GH16711@paasikivi.fi.intel.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: B41849E7468EBFC9B60FC92E7E7E845B75FAEEA141398C78B5F99E380EA612E52000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200701_045806_453683_1A0C1F6D X-CRM114-Status: GOOD ( 24.85 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, drinkcat@chromium.org, andriy.shevchenko@linux.intel.com, srv_heupstream@mediatek.com, devicetree@vger.kernel.org, linus.walleij@linaro.org, shengnan.wang@mediatek.com, Tomasz Figa , bgolaszewski@baylibre.com, sj.huang@mediatek.com, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, dongchun.zhu@mediatek.com, louis.kuo@mediatek.com, matthias.bgg@gmail.com, bingbu.cao@intel.com, mchehab@kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi Tomasz, Sakari, Thanks for the review. On Tue, 2020-06-30 at 21:47 +0300, Sakari Ailus wrote: > On Tue, Jun 30, 2020 at 05:07:46PM +0000, Tomasz Figa wrote: > > Hi Dongchun, > > > > On Tue, Jun 30, 2020 at 10:49:42AM +0800, Dongchun Zhu wrote: > > > Add a V4L2 sub-device driver for OV02A10 image sensor. > > > > > > Signed-off-by: Dongchun Zhu > > > --- > > > MAINTAINERS | 1 + > > > drivers/media/i2c/Kconfig | 13 + > > > drivers/media/i2c/Makefile | 1 + > > > drivers/media/i2c/ov02a10.c | 1052 +++++++++++++++++++++++++++++++++++++++++++ > > > 4 files changed, 1067 insertions(+) > > > create mode 100644 drivers/media/i2c/ov02a10.c > > > > Thank you for the patch. Please see my comments inline. > > > > [snip] > > > +static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd, > > > + struct v4l2_subdev_pad_config *cfg) > > > +{ > > > + struct v4l2_subdev_format fmt = { > > > + .which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE, > > > > As we discussed before, this function is never called with cfg == NULL. > > Perhaps what we need here is to call ov02a10_set_fmt() twice, once for > > V4L2_SUBDEV_FORMAT_ACTIVE and then for V4L2_SUBDEV_FORMAT_TRY? > > > > Sakari, would that be a proper implementation of this function? > > It's fine to test fmt, but it should be only done if the driver calls the > function with ACTIVE format. I.e. it can be removed here, and always use > TRY. > Sorry for my late coming. The implementation of this function should be common(similar to OV2680/OV5645). If it needs to update to be more proper or clear, as user always sets format.which to ACTIVE when calling set_fmt, we could only reserve the TRY format in init_cfg like this: struct v4l2_subdev_format fmt = { which = V4L2_SUBDEV_FORMAT_TRY, > > > > > + .format = { > > > + .width = 1600, > > > + .height = 1200, > > > + } > > > + }; > > > + > > > + ov02a10_set_fmt(sd, cfg, &fmt); > > > + > > > + return 0; > > [snip] > > > > With this and Sakari's comment about the initial state of the reset pin > > fixed, feel free to add my > > > > Reviewed-by: Tomasz Figa > > > > Best regards, > > Tomasz > _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek 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=-5.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=unavailable 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 A1C12C433E0 for ; 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Wed, 1 Jul 2020 16:47:45 +0800 Received: from [10.17.3.153] (10.17.3.153) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 1 Jul 2020 16:47:42 +0800 Message-ID: <1593593242.17166.48.camel@mhfsdcap03> Subject: Re: [PATCH V11 2/2] media: i2c: ov02a10: Add OV02A10 image sensor driver From: Dongchun Zhu To: Sakari Ailus Date: Wed, 1 Jul 2020 16:47:22 +0800 In-Reply-To: <20200630184702.GH16711@paasikivi.fi.intel.com> References: <20200630024942.20891-1-dongchun.zhu@mediatek.com> <20200630024942.20891-3-dongchun.zhu@mediatek.com> <20200630170746.GD1212092@chromium.org> <20200630184702.GH16711@paasikivi.fi.intel.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: B41849E7468EBFC9B60FC92E7E7E845B75FAEEA141398C78B5F99E380EA612E52000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200701_045806_453683_1A0C1F6D X-CRM114-Status: GOOD ( 24.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, drinkcat@chromium.org, andriy.shevchenko@linux.intel.com, srv_heupstream@mediatek.com, devicetree@vger.kernel.org, linus.walleij@linaro.org, shengnan.wang@mediatek.com, Tomasz Figa , bgolaszewski@baylibre.com, sj.huang@mediatek.com, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, dongchun.zhu@mediatek.com, louis.kuo@mediatek.com, matthias.bgg@gmail.com, bingbu.cao@intel.com, mchehab@kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Tomasz, Sakari, Thanks for the review. On Tue, 2020-06-30 at 21:47 +0300, Sakari Ailus wrote: > On Tue, Jun 30, 2020 at 05:07:46PM +0000, Tomasz Figa wrote: > > Hi Dongchun, > > > > On Tue, Jun 30, 2020 at 10:49:42AM +0800, Dongchun Zhu wrote: > > > Add a V4L2 sub-device driver for OV02A10 image sensor. > > > > > > Signed-off-by: Dongchun Zhu > > > --- > > > MAINTAINERS | 1 + > > > drivers/media/i2c/Kconfig | 13 + > > > drivers/media/i2c/Makefile | 1 + > > > drivers/media/i2c/ov02a10.c | 1052 +++++++++++++++++++++++++++++++++++++++++++ > > > 4 files changed, 1067 insertions(+) > > > create mode 100644 drivers/media/i2c/ov02a10.c > > > > Thank you for the patch. Please see my comments inline. > > > > [snip] > > > +static int ov02a10_entity_init_cfg(struct v4l2_subdev *sd, > > > + struct v4l2_subdev_pad_config *cfg) > > > +{ > > > + struct v4l2_subdev_format fmt = { > > > + .which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE, > > > > As we discussed before, this function is never called with cfg == NULL. > > Perhaps what we need here is to call ov02a10_set_fmt() twice, once for > > V4L2_SUBDEV_FORMAT_ACTIVE and then for V4L2_SUBDEV_FORMAT_TRY? > > > > Sakari, would that be a proper implementation of this function? > > It's fine to test fmt, but it should be only done if the driver calls the > function with ACTIVE format. I.e. it can be removed here, and always use > TRY. > Sorry for my late coming. The implementation of this function should be common(similar to OV2680/OV5645). If it needs to update to be more proper or clear, as user always sets format.which to ACTIVE when calling set_fmt, we could only reserve the TRY format in init_cfg like this: struct v4l2_subdev_format fmt = { which = V4L2_SUBDEV_FORMAT_TRY, > > > > > + .format = { > > > + .width = 1600, > > > + .height = 1200, > > > + } > > > + }; > > > + > > > + ov02a10_set_fmt(sd, cfg, &fmt); > > > + > > > + return 0; > > [snip] > > > > With this and Sakari's comment about the initial state of the reset pin > > fixed, feel free to add my > > > > Reviewed-by: Tomasz Figa > > > > Best regards, > > Tomasz > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel