From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 01B4C3FB7E1 for ; Fri, 15 May 2026 09:29:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778837380; cv=none; b=SdInmMdN7VslX3/3mS7XYlje9we7hOi3Y3yRSo7JvJuzvMfeuo3yAi7oZ+GXMFVEbxKdAnU7bOezFYzZcf/p3ouLZQ6o2tfalrdOp0PzYSLDtGMkHz4XOPHMsBxnRul1zp4uzN31h1+SmJLVXlS8e353EedywQFhgmvVwUHBnHo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778837380; c=relaxed/simple; bh=1Gj/HPBROwqJ7CZWPHGQrV3g+Xz9J/TVthqlh8+3p+g=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=il+DAnzFrz7Z4IoroJLSH2hADYg2QziyFaMtthQ2Wn6Fh5TBTP5gF8Hlc9yQ6+pqf1Zi7n8gdcHT8Kn16oHndWENkpa17cEJjR2vhMnjGYyzI70zV7LoaHhPBbeWTedue8vgErmJEnoSVZods9ughBBq+yMsTA7tH/1hdF+Ws+8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1wNoqs-0003eX-W9; Fri, 15 May 2026 11:29:03 +0200 Received: from lupine.office.stw.pengutronix.de ([2a0a:edc0:0:900:1d::4e] helo=lupine) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wNoqr-000u29-1W; Fri, 15 May 2026 11:29:01 +0200 Received: from pza by lupine with local (Exim 4.98.2) (envelope-from ) id 1wNoqr-000000008Ey-1TPR; Fri, 15 May 2026 11:29:01 +0200 Message-ID: <53c57285166ea40ee7a435a0df048955a1ee3a0b.camel@pengutronix.de> Subject: Re: [PATCH 3/5] drm/rcar-du: dsc: Add rudimentary Renesas R-Car V4H DSC driver From: Philipp Zabel To: Tomi Valkeinen , Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Magnus Damm , Marek Vasut , Laurent Pinchart , Kieran Bingham Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org Date: Fri, 15 May 2026 11:29:01 +0200 In-Reply-To: <20260514-rcar-du-dsc-v1-3-d65f7a9e9841@ideasonboard.com> References: <20260514-rcar-du-dsc-v1-0-d65f7a9e9841@ideasonboard.com> <20260514-rcar-du-dsc-v1-3-d65f7a9e9841@ideasonboard.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-0+deb13u1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: devicetree@vger.kernel.org On Do, 2026-05-14 at 15:24 +0300, Tomi Valkeinen wrote: > From: Marek Vasut >=20 > The Renesas DSC Display Stream Compression is a bridge embedded in the > Renesas R-Car V4H SoC. The bridge performs VESA DSC encoding of up to > 8k or 400 Mpixel/s . Add rudimentary driver, which currently acts as a > pass-through bridge and allows DSI1 to be operational on R-Car V4H. >=20 > Signed-off-by: Marek Vasut > [tomi.valkeinen: use bridge->next_bridge, minor changes] > Signed-off-by: Tomi Valkeinen > --- > drivers/gpu/drm/renesas/rcar-du/Kconfig | 13 +++ > drivers/gpu/drm/renesas/rcar-du/Makefile | 1 + > drivers/gpu/drm/renesas/rcar-du/rcar_dsc.c | 163 +++++++++++++++++++++++= ++++++ > 3 files changed, 177 insertions(+) >=20 > diff --git a/drivers/gpu/drm/renesas/rcar-du/Kconfig b/drivers/gpu/drm/re= nesas/rcar-du/Kconfig > index 840305fdeb49..a51f996d3537 100644 > --- a/drivers/gpu/drm/renesas/rcar-du/Kconfig > +++ b/drivers/gpu/drm/renesas/rcar-du/Kconfig > @@ -33,6 +33,19 @@ config DRM_RCAR_DW_HDMI > help > Enable support for R-Car Gen3 or RZ/G2 internal HDMI encoder. > =20 > +config DRM_RCAR_USE_DSC > + bool "R-Car DU DSC Encoder Support" > + depends on DRM_BRIDGE && OF > + depends on DRM_RCAR_DU || COMPILE_TEST > + default DRM_RCAR_DU > + help > + Enable support for the R-Car Display Unit embedded DSC encoder. > + > +config DRM_RCAR_DSC > + def_tristate DRM_RCAR_DU > + depends on DRM_RCAR_USE_DSC > + select RESET_CONTROLLER No need to select RESET_CONTROLLER, the API is stubbed out if not enabled. regards Philipp