From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-182.mta1.migadu.com (out-182.mta1.migadu.com [95.215.58.182]) (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 5451E1F12EC for ; Sat, 11 Jan 2025 19:28:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736623718; cv=none; b=e/0bnMK7Gd4sRnoeyEz5T07kfga6LN9LRYJd2P0CTQnjQc2H9raTxq84KTZfbmqgp93FUp+NF824f4PqWbP+NjVeR7Sj3+fzNLrFKlWjFZGLLPvZKq6kFXIvASuLF4yHQgVDSDJp5o8A7NAUmRhYhDZnXaonJb04E8rNCz733j8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736623718; c=relaxed/simple; bh=Wl1J98cjZyo8GPz7Xxk51PV8gbwTp7Gh6pkFLS8Zj1A=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QaPQEdgoViimUh+rrpRSx6O2M3OY3/30lvZiS9H7hWBYvpW4rZAN7Jawva5cCf64o3Ubu00cqR/ilQEASrRZSYk9pXuQwitIs8/EiBGSj0Pm/jphBu10Q/loXnldYpGZWPeohm7PqTaf+7KR6uYextdnmi9lUJIWtQ/GZpnQlDk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Suoxjt63; arc=none smtp.client-ip=95.215.58.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Suoxjt63" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1736623714; 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=tHrDh2bqwnz4Hr0mA77hopU9CSd3qvTEYXOwip7SMds=; b=Suoxjt63KUi8nbIkFLHLPKsLSCkrm3+rsRLHb8LXMqgGi9EsMwMX8SgtXEzhVBODlc2HG3 Gop1w50LHBXsL9OQuXo7uQOY2A8f6lo/iRj91YmmrJcTX7OYdaRvV1kQmbsO+6AsrOTOlj uUUkNY++BMlb4vtVbe3+DHvkxMIMdCs= From: Aradhya Bhatia To: Tomi Valkeinen , Dmitry Baryshkov , Laurent Pinchart , Andrzej Hajda , Neil Armstrong , Robert Foss , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Nishanth Menon , Vignesh Raghavendra , Devarsh Thakkar , Praneeth Bajjuri , Udit Kumar , Jayesh Choudhary , DRI Development List , Linux Kernel List , Aradhya Bhatia Subject: [PATCH v6 10/12] drm/bridge: cdns-dsi: Move DSI mode check to _atomic_check() Date: Sun, 12 Jan 2025 00:57:36 +0530 Message-Id: <20250111192738.308889-11-aradhya.bhatia@linux.dev> In-Reply-To: <20250111192738.308889-1-aradhya.bhatia@linux.dev> References: <20250111192738.308889-1-aradhya.bhatia@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: Aradhya Bhatia At present, the DSI mode configuration check happens during the _atomic_enable() phase, which is not really the best place for this. Moreover, if the mode is not valid, the driver gives a warning and continues the hardware configuration. Move the DSI mode configuration check to _atomic_check() instead, which can properly report back any invalid mode, before the _enable phase even begins. Signed-off-by: Aradhya Bhatia Signed-off-by: Aradhya Bhatia --- .../gpu/drm/bridge/cadence/cdns-dsi-core.c | 87 +++++++++++++++++-- .../gpu/drm/bridge/cadence/cdns-dsi-core.h | 1 + 2 files changed, 83 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c index acef2171719b..b6de0cbba9c2 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c @@ -425,6 +425,17 @@ #define DSI_NULL_FRAME_OVERHEAD 6 #define DSI_EOT_PKT_SIZE 4 +struct cdns_dsi_bridge_state { + struct drm_bridge_state base; + struct cdns_dsi_cfg dsi_cfg; +}; + +static inline struct cdns_dsi_bridge_state * +to_cdns_dsi_bridge_state(struct drm_bridge_state *bridge_state) +{ + return container_of(bridge_state, struct cdns_dsi_bridge_state, base); +} + static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input) { return container_of(input, struct cdns_dsi, input); @@ -766,6 +777,9 @@ static void cdns_dsi_bridge_atomic_enable(struct drm_bridge *bridge, struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); struct cdns_dsi *dsi = input_to_dsi(input); struct cdns_dsi_output *output = &dsi->output; + struct drm_atomic_state *state = old_bridge_state->base.state; + struct cdns_dsi_bridge_state *dsi_state; + struct drm_bridge_state *new_bridge_state; struct drm_display_mode *mode; struct phy_configure_opts_mipi_dphy *phy_cfg = &output->phy_opts.mipi_dphy; unsigned long tx_byte_period; @@ -776,14 +790,19 @@ static void cdns_dsi_bridge_atomic_enable(struct drm_bridge *bridge, if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0)) return; + new_bridge_state = drm_atomic_get_new_bridge_state(state, bridge); + if (WARN_ON(!new_bridge_state)) + return; + + dsi_state = to_cdns_dsi_bridge_state(new_bridge_state); + dsi_cfg = dsi_state->dsi_cfg; + if (dsi->platform_ops && dsi->platform_ops->enable) dsi->platform_ops->enable(dsi); mode = &bridge->encoder->crtc->state->adjusted_mode; nlanes = output->dev->lanes; - WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false)); - cdns_dsi_init_link(dsi); cdns_dsi_hs_init(dsi); @@ -954,6 +973,63 @@ static u32 *cdns_dsi_bridge_get_input_bus_fmts(struct drm_bridge *bridge, return input_fmts; } +static int cdns_dsi_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge); + struct cdns_dsi *dsi = input_to_dsi(input); + struct cdns_dsi_bridge_state *dsi_state = to_cdns_dsi_bridge_state(bridge_state); + struct drm_display_mode *mode = &crtc_state->mode; + struct cdns_dsi_cfg *dsi_cfg = &dsi_state->dsi_cfg; + + return cdns_dsi_check_conf(dsi, mode, dsi_cfg, false); +} + +static struct drm_bridge_state * +cdns_dsi_bridge_atomic_duplicate_state(struct drm_bridge *bridge) +{ + struct cdns_dsi_bridge_state *dsi_state; + + if (WARN_ON(!bridge->base.state)) + return NULL; + + dsi_state = kzalloc(sizeof(*dsi_state), GFP_KERNEL); + if (!dsi_state) + return NULL; + + __drm_atomic_helper_bridge_duplicate_state(bridge, &dsi_state->base); + + return &dsi_state->base; +} + +static void +cdns_dsi_bridge_atomic_destroy_state(struct drm_bridge *bridge, + struct drm_bridge_state *state) +{ + struct cdns_dsi_bridge_state *dsi_state; + + dsi_state = to_cdns_dsi_bridge_state(state); + + kfree(dsi_state); +} + +static struct drm_bridge_state * +cdns_dsi_bridge_atomic_reset(struct drm_bridge *bridge) +{ + struct cdns_dsi_bridge_state *dsi_state; + + dsi_state = kzalloc(sizeof(*dsi_state), GFP_KERNEL); + if (!dsi_state) + return NULL; + + memset(dsi_state, 0, sizeof(*dsi_state)); + dsi_state->base.bridge = bridge; + + return &dsi_state->base; +} + static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = { .attach = cdns_dsi_bridge_attach, .mode_valid = cdns_dsi_bridge_mode_valid, @@ -961,9 +1037,10 @@ static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = { .atomic_pre_enable = cdns_dsi_bridge_atomic_pre_enable, .atomic_enable = cdns_dsi_bridge_atomic_enable, .atomic_post_disable = cdns_dsi_bridge_atomic_post_disable, - .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_check = cdns_dsi_bridge_atomic_check, + .atomic_duplicate_state = cdns_dsi_bridge_atomic_duplicate_state, + .atomic_destroy_state = cdns_dsi_bridge_atomic_destroy_state, + .atomic_reset = cdns_dsi_bridge_atomic_reset, .atomic_get_input_bus_fmts = cdns_dsi_bridge_get_input_bus_fmts, }; diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h index 5db5dbbbcaad..b785df45bc59 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h +++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.h @@ -77,6 +77,7 @@ struct cdns_dsi { bool link_initialized; bool phy_initialized; struct phy *dphy; + struct cdns_dsi_cfg dsi_cfg; }; #endif /* !__CDNS_DSI_H__ */ -- 2.34.1