From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) (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 157513F4840; Mon, 15 Jun 2026 13:12:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.167.242.64 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781529159; cv=none; b=BLWDdlPXnGE2FySLOSvDdL267NmaRbOFruC3yON5GKqV1hKMXzX6ytSkiQqQsGGM3IPxfkggAKAwQB1oCiRgr2ZBVwXaXtovZCD0T/EFUvCshK3kY1/51FUzbaqLF2CbiN1FBW8hW+Xp09itMdZS8CTuH0/bnhbwguHFUjFKUoc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781529159; c=relaxed/simple; bh=WVpTKxt0Y8sZjOVfWvvS0mMmoeM0hdHAkcNHqIhwc3k=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=NVbSRPK2XXm7f0PpB6T/Q8deYdETZnoFWSXoq6nJCyB5wYqlwY0gMgKggq4N1Luq3clJAMJ60MV2no4FYnihvR0uVCcPAjGGQJZOhI5PvbP4bij5VKqYUbPh7mzS5HtCBdjh4Rwy0WdH82kbcJntgskOGqLPaJS3axryv7wUoRM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com; spf=pass smtp.mailfrom=ideasonboard.com; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b=Gc0fIuNn; arc=none smtp.client-ip=213.167.242.64 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ideasonboard.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="Gc0fIuNn" Received: from [127.0.1.1] (91-158-153-178.elisa-laajakaista.fi [91.158.153.178]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id C17081044; Mon, 15 Jun 2026 15:11:57 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1781529119; bh=WVpTKxt0Y8sZjOVfWvvS0mMmoeM0hdHAkcNHqIhwc3k=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=Gc0fIuNnurtsUC08Dc2Bw+ceWOiqwgh1o60sGIe7zwMMnf4kKezAr8pz+bbR5oTrW M+e/VPNfxdwchY+PmdNRzZhm8/O8eu/RQJnKfv8nQR2KJGh2VO+13AyefPAcCvl3qz gCgs1yuwoeg3XcmvIzx6Ek2Mw5Y/J+izXSIpThEM= From: Tomi Valkeinen Date: Mon, 15 Jun 2026 16:11:56 +0300 Subject: [PATCH v5 3/7] drm/rcar-du: dsc: Add rudimentary Renesas R-Car V4H DSC driver Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260615-rcar-du-dsc-v5-3-aed1a28610e4@ideasonboard.com> References: <20260615-rcar-du-dsc-v5-0-aed1a28610e4@ideasonboard.com> In-Reply-To: <20260615-rcar-du-dsc-v5-0-aed1a28610e4@ideasonboard.com> To: 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 , Philipp Zabel 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, Tomi Valkeinen X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=6466; i=tomi.valkeinen+renesas@ideasonboard.com; h=from:subject:message-id; bh=L1p23iFOE66iZmdNQuzpbDv4ojnQKbPbzpr4ebYOCjo=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBqL/o3sOnu/wRaCTlMmlctlslzId47CyNmiUN0a uUSfB586Y+JAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCai/6NwAKCRD6PaqMvJYe 9eJAD/91wQa8iZ3gzD/kWD8wMXMW9VVm/LsTRIDUJUkVFMEpltHq1rJpC+v4l6Nq/8Im8/M/Y/+ +DMzt/qKlBCutjAFYxOthn6/EVjqZuLHHjmPukC1YR/TVhzQVVafG3WTx5RZNg9MxNZDwUvlfjq 8QA+yhrexfE4k7GbLEcYap05tpPk1gw6HGhGkWyI8riqVbDOg36gedUmDDgG5vdWz1evj/B61Sf tv7rRTyDAPMoN5U1tHjig7+ghsikZAR8QtQjvuhNFh9GQsKuB0NVFc/DSDinyEUPaiynD3Ru94V 0cQAoANTa2lZ7lnX8+Sq1mvlS+wzRpvSNRRkyAukjnWvF+9vPGcCNkgcXmqMHfit7935D/IhD4/ J1XgkSnx24iN/ile4BFKOtWkWcEAUPlFw7719xaniN2HAfwk2wq+qildE+/jTLlTFeot8w9jcIU igPhXUUyD/2WcV7S1G3FtBRQjsniKWvGOPRpoyc6eEscgBQ3V7AWRKlqcRZVZ0s+f/0pwX07YnH 5ROhElAxwWLS01GkfK3O2XglNtAEZcTzZnMIPIJ2xLPz6X1oBED0rpMhY15mFdSW2tD3A2vmXTm I3XRl/X10ZHtlUU7skHIFKYXih286aRkzqGUv1qEEeESw1s0ktlUiCWTuWy5p73nXKpaZz7PtX1 kOiG7TmA1xXsHAQ== X-Developer-Key: i=tomi.valkeinen+renesas@ideasonboard.com; a=openpgp; fpr=C4380C3E965EFD81079FF3A7FA3DAA8CBC961EF5 From: Marek Vasut 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. Signed-off-by: Marek Vasut [tomi.valkeinen: use bridge->next_bridge, minor changes] Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/gpu/drm/renesas/rcar-du/Kconfig | 12 +++ drivers/gpu/drm/renesas/rcar-du/Makefile | 1 + drivers/gpu/drm/renesas/rcar-du/rcar_dsc.c | 154 +++++++++++++++++++++++++++++ 3 files changed, 167 insertions(+) diff --git a/drivers/gpu/drm/renesas/rcar-du/Kconfig b/drivers/gpu/drm/renesas/rcar-du/Kconfig index 840305fdeb49..80bd770ae0f6 100644 --- a/drivers/gpu/drm/renesas/rcar-du/Kconfig +++ b/drivers/gpu/drm/renesas/rcar-du/Kconfig @@ -25,6 +25,18 @@ config DRM_RCAR_CMM def_tristate DRM_RCAR_DU depends on DRM_RCAR_USE_CMM +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 + config DRM_RCAR_DW_HDMI tristate "R-Car Gen3 and RZ/G2 DU HDMI Encoder Support" depends on DRM && OF diff --git a/drivers/gpu/drm/renesas/rcar-du/Makefile b/drivers/gpu/drm/renesas/rcar-du/Makefile index 6f132325c8b7..9ab7a0ac45d8 100644 --- a/drivers/gpu/drm/renesas/rcar-du/Makefile +++ b/drivers/gpu/drm/renesas/rcar-du/Makefile @@ -10,6 +10,7 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o obj-$(CONFIG_DRM_RCAR_CMM) += rcar_cmm.o +obj-$(CONFIG_DRM_RCAR_DSC) += rcar_dsc.o obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o obj-$(CONFIG_DRM_RCAR_LVDS) += rcar_lvds.o diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_dsc.c b/drivers/gpu/drm/renesas/rcar-du/rcar_dsc.c new file mode 100644 index 000000000000..362e683289d6 --- /dev/null +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_dsc.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * R-Car DSC Encoder + * + * Copyright (C) 2025 Marek Vasut + * Copyright (C) 2025 Renesas Electronics Corporation + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +struct rcar_dsc { + struct drm_bridge bridge; + + struct device *dev; +}; + +static inline struct rcar_dsc *bridge_to_rcar_dsc(struct drm_bridge *bridge) +{ + return container_of(bridge, struct rcar_dsc, bridge); +} + +/* ----------------------------------------------------------------------------- + * Bridge + */ + +static int rcar_dsc_attach(struct drm_bridge *bridge, + struct drm_encoder *encoder, + enum drm_bridge_attach_flags flags) +{ + struct rcar_dsc *dsc = bridge_to_rcar_dsc(bridge); + + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) + return -EINVAL; + + return drm_bridge_attach(encoder, dsc->bridge.next_bridge, bridge, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); +} + +static void rcar_dsc_atomic_enable(struct drm_bridge *bridge, + struct drm_atomic_commit *commit) +{ + struct rcar_dsc *dsc = bridge_to_rcar_dsc(bridge); + + WARN_ON(pm_runtime_get_sync(dsc->dev) < 0); +} + +static void rcar_dsc_atomic_disable(struct drm_bridge *bridge, + struct drm_atomic_commit *commit) +{ + struct rcar_dsc *dsc = bridge_to_rcar_dsc(bridge); + + pm_runtime_put(dsc->dev); +} + +static enum drm_mode_status +rcar_dsc_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + if (mode->hdisplay < 320 || mode->hdisplay > 8190) + return MODE_BAD_HVALUE; + + if (mode->vdisplay < 160 || mode->vdisplay > 8190) + return MODE_BAD_VVALUE; + + if (mode->clock > 400000) /* Really 400 Mpixel/s */ + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + +static const struct drm_bridge_funcs rcar_dsc_bridge_ops = { + .attach = rcar_dsc_attach, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_enable = rcar_dsc_atomic_enable, + .atomic_disable = rcar_dsc_atomic_disable, + .mode_valid = rcar_dsc_bridge_mode_valid, +}; + +/* ----------------------------------------------------------------------------- + * Probe & Remove + */ + +static int rcar_dsc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rcar_dsc *dsc; + int ret; + + dsc = devm_drm_bridge_alloc(dev, struct rcar_dsc, bridge, + &rcar_dsc_bridge_ops); + if (IS_ERR(dsc)) + return PTR_ERR(dsc); + + platform_set_drvdata(pdev, dsc); + + dsc->dev = &pdev->dev; + + dsc->bridge.next_bridge = of_drm_get_bridge_by_endpoint(dev->of_node, + 1, 0); + if (IS_ERR(dsc->bridge.next_bridge)) + return PTR_ERR(dsc->bridge.next_bridge); + + dsc->bridge.of_node = dev->of_node; + + pm_runtime_enable(&pdev->dev); + + ret = devm_drm_bridge_add(dev, &dsc->bridge); + if (ret) + goto err_runtime_disable; + + return 0; + +err_runtime_disable: + pm_runtime_disable(&pdev->dev); + + return ret; +} + +static void rcar_dsc_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); +} + +static const struct of_device_id rcar_dsc_of_table[] = { + { .compatible = "renesas,r8a779g0-dsc" }, + {} +}; + +MODULE_DEVICE_TABLE(of, rcar_dsc_of_table); + +static struct platform_driver rcar_dsc_platform_driver = { + .probe = rcar_dsc_probe, + .remove = rcar_dsc_remove, + .driver = { + .name = "rcar-dsc", + .of_match_table = rcar_dsc_of_table, + }, +}; + +module_platform_driver(rcar_dsc_platform_driver); + +MODULE_DESCRIPTION("Renesas R-Car DSC Encoder Driver"); +MODULE_LICENSE("GPL"); -- 2.43.0