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Thu, 14 Feb 2019 11:26:11 -0800 (PST) From: Jagan Teki To: Maxime Ripard , David Airlie , Daniel Vetter , Chen-Yu Tsai Subject: [PATCH v8 2/8] drm/sun4i: sun6i_mipi_dsi: Fix DSI hbp timing value Date: Fri, 15 Feb 2019 00:55:38 +0530 Message-Id: <20190214192544.7314-3-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_112613_593482_B23FCA00 X-CRM114-Status: GOOD ( 13.85 ) 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 Current driver is calculating hbp maximum value by subtracting hsync_start with hdisplay which is front porch value, but the hbp refers to back porch. Back porch value is calculating by subtracting htotal with hsync_end as per drm_mode timings, and BSP code from BPI-M64-bsp is eventually following the same. BPI-M64-bsp is computing hbp as (in drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) dsi_hbp = (hbp-hspw)*dsi_pixel_bits[format]/8 - (4+2); => (panel->lcd_hbp - timmings->hor_sync_time) => (timmings->hor_back_porch + timmings->hor_sync_time - timmings->hor_sync_time) => timmings->hor_back_porch => mode->htotal - mode->hsync_end So, update the hbp value accordingly in sun6i_dsi_setup_timings. Tested on 2-lane, 4-lane DSI LCD panels. Signed-off-by: Jagan Teki Tested-by: Merlijn Wajer --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index d70a8c43a4b8..982ae6b17654 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -472,7 +472,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HBP_PACKET_OVERHEAD 6 hbp = max((unsigned int)HBP_PACKET_OVERHEAD, - (mode->hsync_start - mode->hdisplay) * Bpp - HBP_PACKET_OVERHEAD); + (mode->htotal - mode->hsync_end) * Bpp - HBP_PACKET_OVERHEAD); /* * The frontporch is set using a blanking packet (4 bytes + -- 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 2/8] drm/sun4i: sun6i_mipi_dsi: Fix DSI hbp timing value Date: Fri, 15 Feb 2019 00:55:38 +0530 Message-ID: <20190214192544.7314-3-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-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by gabe.freedesktop.org (Postfix) with ESMTPS id A8DF16EAA8 for ; Thu, 14 Feb 2019 19:26:12 +0000 (UTC) Received: by mail-pf1-x442.google.com with SMTP id s22so3588186pfh.4 for ; Thu, 14 Feb 2019 11:26:12 -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 Q3VycmVudCBkcml2ZXIgaXMgY2FsY3VsYXRpbmcgaGJwIG1heGltdW0gdmFsdWUgYnkgc3VidHJh Y3RpbmcKaHN5bmNfc3RhcnQgd2l0aCBoZGlzcGxheSB3aGljaCBpcyBmcm9udCBwb3JjaCB2YWx1 ZSwgYnV0IHRoZQpoYnAgcmVmZXJzIHRvIGJhY2sgcG9yY2guCgpCYWNrIHBvcmNoIHZhbHVlIGlz IGNhbGN1bGF0aW5nIGJ5IHN1YnRyYWN0aW5nIGh0b3RhbCB3aXRoCmhzeW5jX2VuZCBhcyBwZXIg ZHJtX21vZGUgdGltaW5ncywgYW5kIEJTUCBjb2RlIGZyb20gQlBJLU02NC1ic3AKaXMgZXZlbnR1 YWxseSBmb2xsb3dpbmcgdGhlIHNhbWUuCgpCUEktTTY0LWJzcCBpcyBjb21wdXRpbmcgaGJwIGFz CihpbiBkcml2ZXJzL3ZpZGVvL3N1bnhpL2Rpc3AyL2Rpc3AvZGUvbG93bGV2ZWxfc3VuNTBpdzEv ZGVfZHNpLmMpCmRzaV9oYnAgPSAoaGJwLWhzcHcpKmRzaV9waXhlbF9iaXRzW2Zvcm1hdF0vOCAt ICg0KzIpOwo9PiAocGFuZWwtPmxjZF9oYnAgLSB0aW1taW5ncy0+aG9yX3N5bmNfdGltZSkKPT4g KHRpbW1pbmdzLT5ob3JfYmFja19wb3JjaCArIHRpbW1pbmdzLT5ob3Jfc3luY190aW1lIC0KICAg IHRpbW1pbmdzLT5ob3Jfc3luY190aW1lKQo9PiB0aW1taW5ncy0+aG9yX2JhY2tfcG9yY2gKPT4g bW9kZS0+aHRvdGFsIC0gbW9kZS0+aHN5bmNfZW5kCgpTbywgdXBkYXRlIHRoZSBoYnAgdmFsdWUg YWNjb3JkaW5nbHkgaW4gc3VuNmlfZHNpX3NldHVwX3RpbWluZ3MuCgpUZXN0ZWQgb24gMi1sYW5l LCA0LWxhbmUgRFNJIExDRCBwYW5lbHMuCgpTaWduZWQtb2ZmLWJ5OiBKYWdhbiBUZWtpIDxqYWdh bkBhbWFydWxhc29sdXRpb25zLmNvbT4KVGVzdGVkLWJ5OiBNZXJsaWpuIFdhamVyIDxtZXJsaWpu QHdpenp1cC5vcmc+Ci0tLQogZHJpdmVycy9ncHUvZHJtL3N1bjRpL3N1bjZpX21pcGlfZHNpLmMg fCAyICstCiAxIGZpbGUgY2hhbmdlZCwgMSBpbnNlcnRpb24oKyksIDEgZGVsZXRpb24oLSkKCmRp ZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vc3VuNGkvc3VuNmlfbWlwaV9kc2kuYyBiL2RyaXZl cnMvZ3B1L2RybS9zdW40aS9zdW42aV9taXBpX2RzaS5jCmluZGV4IGQ3MGE4YzQzYTRiOC4uOTgy YWU2YjE3NjU0IDEwMDY0NAotLS0gYS9kcml2ZXJzL2dwdS9kcm0vc3VuNGkvc3VuNmlfbWlwaV9k c2kuYworKysgYi9kcml2ZXJzL2dwdS9kcm0vc3VuNGkvc3VuNmlfbWlwaV9kc2kuYwpAQCAtNDcy LDcgKzQ3Miw3IEBAIHN0YXRpYyB2b2lkIHN1bjZpX2RzaV9zZXR1cF90aW1pbmdzKHN0cnVjdCBz dW42aV9kc2kgKmRzaSwKIAkgKi8KICNkZWZpbmUgSEJQX1BBQ0tFVF9PVkVSSEVBRAk2CiAJaGJw ID0gbWF4KCh1bnNpZ25lZCBpbnQpSEJQX1BBQ0tFVF9PVkVSSEVBRCwKLQkJICAobW9kZS0+aHN5 bmNfc3RhcnQgLSBtb2RlLT5oZGlzcGxheSkgKiBCcHAgLSBIQlBfUEFDS0VUX09WRVJIRUFEKTsK KwkJICAobW9kZS0+aHRvdGFsIC0gbW9kZS0+aHN5bmNfZW5kKSAqIEJwcCAtIEhCUF9QQUNLRVRf T1ZFUkhFQUQpOwogCiAJLyoKIAkgKiBUaGUgZnJvbnRwb3JjaCBpcyBzZXQgdXNpbmcgYSBibGFu a2luZyBwYWNrZXQgKDQgYnl0ZXMgKwotLSAKMi4xOC4wLjMyMS5nZmZjNmZhMGUzCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGlu ZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVl ZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWw= 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,URIBL_BLOCKED,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 144A7C43381 for ; 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Thu, 14 Feb 2019 11:26:12 -0800 (PST) Received: from localhost.localdomain ([115.97.184.151]) by smtp.gmail.com with ESMTPSA id k71sm8390100pga.44.2019.02.14.11.26.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Feb 2019 11:26:11 -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 2/8] drm/sun4i: sun6i_mipi_dsi: Fix DSI hbp timing value Date: Fri, 15 Feb 2019 00:55:38 +0530 Message-Id: <20190214192544.7314-3-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 Current driver is calculating hbp maximum value by subtracting hsync_start with hdisplay which is front porch value, but the hbp refers to back porch. Back porch value is calculating by subtracting htotal with hsync_end as per drm_mode timings, and BSP code from BPI-M64-bsp is eventually following the same. BPI-M64-bsp is computing hbp as (in drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c) dsi_hbp = (hbp-hspw)*dsi_pixel_bits[format]/8 - (4+2); => (panel->lcd_hbp - timmings->hor_sync_time) => (timmings->hor_back_porch + timmings->hor_sync_time - timmings->hor_sync_time) => timmings->hor_back_porch => mode->htotal - mode->hsync_end So, update the hbp value accordingly in sun6i_dsi_setup_timings. Tested on 2-lane, 4-lane DSI LCD panels. Signed-off-by: Jagan Teki Tested-by: Merlijn Wajer --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index d70a8c43a4b8..982ae6b17654 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -472,7 +472,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, */ #define HBP_PACKET_OVERHEAD 6 hbp = max((unsigned int)HBP_PACKET_OVERHEAD, - (mode->hsync_start - mode->hdisplay) * Bpp - HBP_PACKET_OVERHEAD); + (mode->htotal - mode->hsync_end) * Bpp - HBP_PACKET_OVERHEAD); /* * The frontporch is set using a blanking packet (4 bytes + -- 2.18.0.321.gffc6fa0e3