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Thu, 14 Feb 2019 11:26:22 -0800 (PST) From: Jagan Teki To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai Subject: [PATCH v8 5/8] drm/sun4i: sun6i_mipi_dsi: Add DSI hblk packet overhead Date: Fri, 15 Feb 2019 00:55:41 +0530 Message-Id: <20190214192544.7314-6-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20190214192544.7314-1-jagan@amarulasolutions.com> References: <20190214192544.7314-1-jagan@amarulasolutions.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190214_112624_915462_48BE9463 X-CRM114-Status: GOOD ( 14.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jagan Teki , Michael Trimarchi , linux-amarula@amarulasolutions.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Like other dsi setup timings, hblk would also require to add packet overhead. Add 10 bytes packet overhead for hblk, so the blank is set using a blanking packet like (4 bytes + 4 bytes + payload + 2 bytes) The value 10 bytes are refereed from Allwinner BSP like how other dsi setup timings grabs in existing driver. This is according to BSP code from BPI-M64-bsp (from linux-sunxi/ drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) dsi_hblk = (ht-hspw)*dsi_pixel_bits[format]/8-(4+4+2); So, add 10 bytes packet overhead for DSI hblk. Tested on 2-lane, 4-lane MIPI-DSI LCD panels. Signed-off-by: Jagan Teki --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 6b26dba883e8..a64e6ec00f22 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -485,8 +485,13 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, /* * hblk seems to be the line + porches length. + * The blank is set using a blanking packet (4 bytes + 4 bytes + + * payload + 2 bytes). So minimal size is 10 bytes */ - hblk = (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp; +#define HBLK_PACKET_OVERHEAD 10 + hblk = max((unsigned int)HBLK_PACKET_OVERHEAD, + (mode->htotal - (mode->hsync_end - mode->hsync_start)) * + Bpp - HBLK_PACKET_OVERHEAD); /* * And I'm not entirely sure what vblk is about. The driver in -- 2.18.0.321.gffc6fa0e3 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jagan Teki Subject: [PATCH v8 5/8] drm/sun4i: sun6i_mipi_dsi: Add DSI hblk packet overhead Date: Fri, 15 Feb 2019 00:55:41 +0530 Message-ID: <20190214192544.7314-6-jagan@amarulasolutions.com> References: <20190214192544.7314-1-jagan@amarulasolutions.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7971E6EAAC for ; Thu, 14 Feb 2019 19:26:23 +0000 (UTC) Received: by mail-pg1-x544.google.com with SMTP id y4so3536453pgc.12 for ; Thu, 14 Feb 2019 11:26:23 -0800 (PST) In-Reply-To: <20190214192544.7314-1-jagan@amarulasolutions.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Jagan Teki , Michael Trimarchi , linux-amarula@amarulasolutions.com, linux-arm-kernel@lists.infradead.org List-Id: dri-devel@lists.freedesktop.org TGlrZSBvdGhlciBkc2kgc2V0dXAgdGltaW5ncywgaGJsayB3b3VsZCBhbHNvIHJlcXVpcmUgdG8g YWRkCnBhY2tldCBvdmVyaGVhZC4KCkFkZCAxMCBieXRlcyBwYWNrZXQgb3ZlcmhlYWQgZm9yIGhi bGssIHNvIHRoZSBibGFuayBpcyBzZXQgdXNpbmcKYSBibGFua2luZyBwYWNrZXQgbGlrZSAoNCBi eXRlcyArIDQgYnl0ZXMgKyBwYXlsb2FkICsgMiBieXRlcykKClRoZSB2YWx1ZSAxMCBieXRlcyBh cmUgcmVmZXJlZWQgZnJvbSBBbGx3aW5uZXIgQlNQIGxpa2UgaG93IG90aGVyCmRzaSBzZXR1cCB0 aW1pbmdzIGdyYWJzIGluIGV4aXN0aW5nIGRyaXZlci4KClRoaXMgaXMgYWNjb3JkaW5nIHRvIEJT UCBjb2RlIGZyb20gQlBJLU02NC1ic3AgKGZyb20gbGludXgtc3VueGkvCmRyaXZlcnMvdmlkZW8v c3VueGkvZGlzcDIvZGlzcC9kZS9sb3dsZXZlbF9zdW41MGl3MS9kZV9kc2kuYykKCmRzaV9oYmxr ID0gKGh0LWhzcHcpKmRzaV9waXhlbF9iaXRzW2Zvcm1hdF0vOC0oNCs0KzIpOwoKU28sIGFkZCAx MCBieXRlcyBwYWNrZXQgb3ZlcmhlYWQgZm9yIERTSSBoYmxrLgoKVGVzdGVkIG9uIDItbGFuZSwg NC1sYW5lIE1JUEktRFNJIExDRCBwYW5lbHMuCgpTaWduZWQtb2ZmLWJ5OiBKYWdhbiBUZWtpIDxq YWdhbkBhbWFydWxhc29sdXRpb25zLmNvbT4KLS0tCiBkcml2ZXJzL2dwdS9kcm0vc3VuNGkvc3Vu NmlfbWlwaV9kc2kuYyB8IDcgKysrKysrLQogMSBmaWxlIGNoYW5nZWQsIDYgaW5zZXJ0aW9ucygr KSwgMSBkZWxldGlvbigtKQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvZ3B1L2RybS9zdW40aS9zdW42 aV9taXBpX2RzaS5jIGIvZHJpdmVycy9ncHUvZHJtL3N1bjRpL3N1bjZpX21pcGlfZHNpLmMKaW5k ZXggNmIyNmRiYTg4M2U4Li5hNjRlNmVjMDBmMjIgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvZ3B1L2Ry bS9zdW40aS9zdW42aV9taXBpX2RzaS5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9zdW40aS9zdW42 aV9taXBpX2RzaS5jCkBAIC00ODUsOCArNDg1LDEzIEBAIHN0YXRpYyB2b2lkIHN1bjZpX2RzaV9z ZXR1cF90aW1pbmdzKHN0cnVjdCBzdW42aV9kc2kgKmRzaSwKIAogCS8qCiAJICogaGJsayBzZWVt cyB0byBiZSB0aGUgbGluZSArIHBvcmNoZXMgbGVuZ3RoLgorCSAqIFRoZSBibGFuayBpcyBzZXQg dXNpbmcgYSBibGFua2luZyBwYWNrZXQgKDQgYnl0ZXMgKyA0IGJ5dGVzICsKKwkgKiBwYXlsb2Fk ICsgMiBieXRlcykuIFNvIG1pbmltYWwgc2l6ZSBpcyAxMCBieXRlcwogCSAqLwotCWhibGsgPSAo bW9kZS0+aHRvdGFsIC0gKG1vZGUtPmhzeW5jX2VuZCAtIG1vZGUtPmhzeW5jX3N0YXJ0KSkgKiBC cHA7CisjZGVmaW5lIEhCTEtfUEFDS0VUX09WRVJIRUFECTEwCisJaGJsayA9IG1heCgodW5zaWdu ZWQgaW50KUhCTEtfUEFDS0VUX09WRVJIRUFELAorCQkgICAobW9kZS0+aHRvdGFsIC0gKG1vZGUt PmhzeW5jX2VuZCAtIG1vZGUtPmhzeW5jX3N0YXJ0KSkgKgorCQkgICBCcHAgLSBIQkxLX1BBQ0tF VF9PVkVSSEVBRCk7CiAKIAkvKgogCSAqIEFuZCBJJ20gbm90IGVudGlyZWx5IHN1cmUgd2hhdCB2 YmxrIGlzIGFib3V0LiBUaGUgZHJpdmVyIGluCi0tIAoyLjE4LjAuMzIxLmdmZmM2ZmEwZTMKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBt YWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbA== 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT 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 41135C10F05 for ; 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Thu, 14 Feb 2019 11:26:23 -0800 (PST) Received: from localhost.localdomain ([115.97.184.151]) by smtp.gmail.com with ESMTPSA id k71sm8390100pga.44.2019.02.14.11.26.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Feb 2019 11:26:22 -0800 (PST) From: Jagan Teki To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai Cc: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-amarula@amarulasolutions.com, Michael Trimarchi , Jagan Teki Subject: [PATCH v8 5/8] drm/sun4i: sun6i_mipi_dsi: Add DSI hblk packet overhead Date: Fri, 15 Feb 2019 00:55:41 +0530 Message-Id: <20190214192544.7314-6-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 In-Reply-To: <20190214192544.7314-1-jagan@amarulasolutions.com> References: <20190214192544.7314-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Like other dsi setup timings, hblk would also require to add packet overhead. Add 10 bytes packet overhead for hblk, so the blank is set using a blanking packet like (4 bytes + 4 bytes + payload + 2 bytes) The value 10 bytes are refereed from Allwinner BSP like how other dsi setup timings grabs in existing driver. This is according to BSP code from BPI-M64-bsp (from linux-sunxi/ drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) dsi_hblk = (ht-hspw)*dsi_pixel_bits[format]/8-(4+4+2); So, add 10 bytes packet overhead for DSI hblk. Tested on 2-lane, 4-lane MIPI-DSI LCD panels. Signed-off-by: Jagan Teki --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 6b26dba883e8..a64e6ec00f22 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -485,8 +485,13 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, /* * hblk seems to be the line + porches length. + * The blank is set using a blanking packet (4 bytes + 4 bytes + + * payload + 2 bytes). So minimal size is 10 bytes */ - hblk = (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp; +#define HBLK_PACKET_OVERHEAD 10 + hblk = max((unsigned int)HBLK_PACKET_OVERHEAD, + (mode->htotal - (mode->hsync_end - mode->hsync_start)) * + Bpp - HBLK_PACKET_OVERHEAD); /* * And I'm not entirely sure what vblk is about. The driver in -- 2.18.0.321.gffc6fa0e3