From patchwork Mon Jul 3 21:47:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 698797 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 047D6EB64DD for ; Mon, 3 Jul 2023 21:47:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231250AbjGCVrl (ORCPT ); Mon, 3 Jul 2023 17:47:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231277AbjGCVrk (ORCPT ); Mon, 3 Jul 2023 17:47:40 -0400 Received: from aposti.net (aposti.net [89.234.176.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2428610CB; Mon, 3 Jul 2023 14:47:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1688420844; 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=4oLQCPLjN8l2YTID6H0ryGT8g2PPvTf/0QShunooQsw=; b=zuFEIjlOtnxkYeTqQUiaRC/fqJuLVJwfE+bRXOBfTf9OUPSyrvsjIHB9wVh7TrYrgdu3j4 JlsBd7qukg5cl5unEybkMpTXIK9th0e6VmcSeDbQFfmtS6Nz/Z17b5ACWufyCLDl6k/1se ie6uqAoSeR+sgWPIYTKK2w9cdyquDEU= 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 1/3] drm/panel: ld9040: Use better magic values Date: Mon, 3 Jul 2023 23:47:13 +0200 Message-Id: <20230703214715.623447-2-paul@crapouillou.net> In-Reply-To: <20230703214715.623447-1-paul@crapouillou.net> References: <20230703214715.623447-1-paul@crapouillou.net> MIME-Version: 1.0 X-Spam: Yes Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.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 Signed-off-by: Paul Cercueil Reviewed-by: Neil Armstrong --- drivers/gpu/drm/panel/panel-samsung-ld9040.c | 11 ++++++----- 1 file changed, 6 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..7fd9444b42c5 100644 --- a/drivers/gpu/drm/panel/panel-samsung-ld9040.c +++ b/drivers/gpu/drm/panel/panel-samsung-ld9040.c @@ -180,17 +180,18 @@ 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); ld9040_dcs_write_seq_static(ctx, MIPI_DCS_SET_DISPLAY_ON); }