From patchwork Sat Jul 8 08:40:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 13305625 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CFE63EB64DC for ; Sat, 8 Jul 2023 08:41:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bkrLYtRM+ccxm8d34+Yq6s/AcC8ZRx85Qfaph/P4lHc=; b=J7wJOwyg7mvOGI YWFCu75w8EdmmjiEvlSuwqXVjhJEHJAK4ySPUHC5Ou6Wtyw8OW+1qCOvVWCTjQ1GRfUrN1qB5jyus /pqicQUXj3u0ibGnRp+2cyyWUjd7TpXxWGiqVvJMOqzplkpxa18xASR3o1il7Z2Cqqv1fcl2jKsqj ibL3iRZhwZa4xHdNjFDuDIzU+dc1mSWg+yxJV5YXbfC0nyCEPCDY3eUkmh24BTBsXBAFzV2j4Q6X8 gEZ750CXtJmbOFkAbCRt3sff/G/C2+tlVQ1GgwKMoHMNgV0AcbstG4EoxCCjoyT3sYxpHWpnLD8bF VYRD4IEBNV7eL0+F0P4w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qI3Ur-006qJa-2P; Sat, 08 Jul 2023 08:40:53 +0000 Received: from aposti.net ([89.234.176.197]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qI3Uo-006qHz-2G for linux-arm-kernel@lists.infradead.org; Sat, 08 Jul 2023 08:40:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1688805637; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NhoqtqxyhPtY8CBHiEHyPDLJNhjPqQS0txLNegyEoqo=; b=qpGNnr2XiVksOlNWj1Q+pnXybM//PE1W9vZvc0vlTKXAmf9O/Mu6NxHBtJgIsYSOz9hGLo z0+Gb7Nmmq6b9V6zv4xDoUIsYoP8GPhZn47yHI6HH4x9Fn8zUaAuYW1WeHx75DTAntw1Zv 5xnGtBGQtubzsAeJS38w5UhF2BWBUzA= From: Paul Cercueil To: Krzysztof Kozlowski , Rob Herring , Conor Dooley , Alim Akhtar , Neil Armstrong , Sam Ravnborg Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Paul Cercueil Subject: [PATCH v2 1/3] drm/panel: ld9040: Use better magic values Date: Sat, 8 Jul 2023 10:40:25 +0200 Message-Id: <20230708084027.18352-2-paul@crapouillou.net> In-Reply-To: <20230708084027.18352-1-paul@crapouillou.net> References: <20230708084027.18352-1-paul@crapouillou.net> MIME-Version: 1.0 X-Spam: Yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230708_014050_893846_E1DD11BE X-CRM114-Status: GOOD ( 10.47 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org I have no idea what the prior magic values mean, and I have no idea what my replacement (extracted from [1]) magic values mean. What I do know, is that these new values result in a much better picture, where the blacks are really black (as you would expect on an AMOLED display) instead of grey-ish. [1]: https://github.com/dorimanx/Dorimanx-SG2-I9100-Kernel/blob/master-jelly-bean/arch/arm/mach-exynos/u1-panel.h v2: Remove spurious new line Signed-off-by: Paul Cercueil Reviewed-by: Neil Armstrong --- drivers/gpu/drm/panel/panel-samsung-ld9040.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-samsung-ld9040.c b/drivers/gpu/drm/panel/panel-samsung-ld9040.c index 01eb211f32f7..f39f999c21af 100644 --- a/drivers/gpu/drm/panel/panel-samsung-ld9040.c +++ b/drivers/gpu/drm/panel/panel-samsung-ld9040.c @@ -180,15 +180,15 @@ static void ld9040_init(struct ld9040 *ctx) { ld9040_dcs_write_seq_static(ctx, MCS_USER_SETTING, 0x5a, 0x5a); ld9040_dcs_write_seq_static(ctx, MCS_PANEL_CONDITION, - 0x05, 0x65, 0x96, 0x71, 0x7d, 0x19, 0x3b, 0x0d, - 0x19, 0x7e, 0x0d, 0xe2, 0x00, 0x00, 0x7e, 0x7d, - 0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02); + 0x05, 0x5e, 0x96, 0x6b, 0x7d, 0x0d, 0x3f, 0x00, + 0x00, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x07, 0x05, 0x1f, 0x1f, 0x1f, 0x00, 0x00); ld9040_dcs_write_seq_static(ctx, MCS_DISPCTL, - 0x02, 0x08, 0x08, 0x10, 0x10); + 0x02, 0x06, 0x0a, 0x10, 0x10); ld9040_dcs_write_seq_static(ctx, MCS_MANPWR, 0x04); ld9040_dcs_write_seq_static(ctx, MCS_POWER_CTRL, 0x0a, 0x87, 0x25, 0x6a, 0x44, 0x02, 0x88); - ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0d, 0x00, 0x16); + ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0f, 0x00, 0x16); ld9040_dcs_write_seq_static(ctx, MCS_GTCON, 0x09, 0x00, 0x00); ld9040_brightness_set(ctx); ld9040_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE);