From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E2D3432274B; Mon, 18 Aug 2025 13:32:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755523929; cv=none; b=Q9fcKTJ0yF8z5shpn0gEVHjQgD78TGrW8RTsH6+GcRHNeMfVIDAHn6zwRl8BdHeoR1uPr3Sa+KPHF1bIiU2Iu/SFOuIf71wtTqGCOwS6P+J6aLPKFhqXuM96fURYVsxx4t8DYmyGls5wJzMZrI5rH0u5yNS+k5fZHnTOD6JfZas= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755523929; c=relaxed/simple; bh=PAff590vJRw8ScjbHkCkmsAMKefD6vw0zUyjzOXRvU0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=G7fNoWw5Rm703NQQlOIfncyFoOQryJfIjPRMRZw/Ofyb0DsdAppINxg+ILmg3KtAR27Yg2uu10wbvvCMzBpwDFOIcgyuYSMW4x4b91O/GsIMuK78KGBNmHTAuV+fEcJHmZzg4hDgxWinF18CmmA9rO/XN/JSfZ63m1/i0RuG7E0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JvveJjBJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JvveJjBJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11360C4CEEB; Mon, 18 Aug 2025 13:32:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755523928; bh=PAff590vJRw8ScjbHkCkmsAMKefD6vw0zUyjzOXRvU0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JvveJjBJcHDRRIeY2atdIlsuG3ob74mhR6MM+JwMw0ho/iHF4R7iFn19ZAGJdqsXO xTLHkSH6cMVF1CRTUK8DzoEfPHel6nUPW7XLfOWit3ze6bcCCmWjAbTfF9pvd3ASdq emfS5ThA/XiPigZY9C2Y5bPFJgryLwNmPuEfWoA8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fabrizio Castro , Lad Prabhakar , Biju Das , Laurent Pinchart , Sasha Levin Subject: [PATCH 6.15 315/515] drm: renesas: rz-du: mipi_dsi: Add min check for VCLK range Date: Mon, 18 Aug 2025 14:45:01 +0200 Message-ID: <20250818124510.561007800@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124458.334548733@linuxfoundation.org> References: <20250818124458.334548733@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lad Prabhakar [ Upstream commit e37a95d01d5acce211da8446fefbd8684c67f516 ] The VCLK range for Renesas RZ/G2L SoC is 5.803 MHz to 148.5 MHz. Add a minimum clock check in the mode_valid callback to ensure that the clock value does not fall below the valid range. Co-developed-by: Fabrizio Castro Signed-off-by: Fabrizio Castro Signed-off-by: Lad Prabhakar Reviewed-by: Biju Das Reviewed-by: Laurent Pinchart Signed-off-by: Biju Das Link: https://lore.kernel.org/r/20250609225630.502888-2-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c index 4550c6d84796..ec8baecb9ba5 100644 --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c @@ -584,6 +584,9 @@ rzg2l_mipi_dsi_bridge_mode_valid(struct drm_bridge *bridge, if (mode->clock > 148500) return MODE_CLOCK_HIGH; + if (mode->clock < 5803) + return MODE_CLOCK_LOW; + return MODE_OK; } -- 2.39.5