From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 89992EB64D7 for ; Tue, 20 Jun 2023 17:34:02 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E2CD010E308; Tue, 20 Jun 2023 17:34:01 +0000 (UTC) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id D0C0610E193 for ; Tue, 20 Jun 2023 17:33:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687282438; x=1718818438; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=Zt/NzaBerGfwQKBAy7hfoV83y2pBEuKim7jXQ4QEjFw=; b=BtqWbgIOJJbxDDydZyB/1raCR2FMQ4RrRQlLDOi7SbzohymMTAbaANHy /7kpkUF5lfeQ6KhEHEbFQVMMbtVXNT1CMD6UD+rl+0lK8yf6ZJ4Y7mShT GcT7rJbEkfJJ1AAEDNnfM5E74EvIzCeAl7Hkv+E37l0zVJIaCKb+K/lSy dOP3GHTkC3klo2Rt6YiG8ANv9Oo3Gi50MOWDtceOR1dkrEk9JaCgbDoME 4cBrjD/SZ1DY6UKrX46STMOmDhxzlZT8yOMtGOVnpsAouff7eEZcPN7N4 WwZWKkN5B2sh4UVybXhPkI2HrL1s1ggbg8xMpFKhE7OJgpMRFDvvogp6o Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="363353808" X-IronPort-AV: E=Sophos;i="6.00,257,1681196400"; d="scan'208";a="363353808" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2023 10:32:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="804029166" X-IronPort-AV: E=Sophos;i="6.00,257,1681196400"; d="scan'208";a="804029166" Received: from stinkpipe.fi.intel.com (HELO stinkbox) ([10.237.72.70]) by FMSMGA003.fm.intel.com with SMTP; 20 Jun 2023 10:32:53 -0700 Received: by stinkbox (sSMTP sendmail emulation); Tue, 20 Jun 2023 20:32:52 +0300 From: Ville Syrjala To: intel-gfx@lists.freedesktop.org Date: Tue, 20 Jun 2023 20:32:40 +0300 Message-Id: <20230620173242.26923-4-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230620173242.26923-1-ville.syrjala@linux.intel.com> References: <20230620173242.26923-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-gfx] [PATCH v2 3/5] drm/i915: Remove DDC pin sanitation X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Ville Syrjälä Stop with the VBT DDC pin sanitation, and instead just check that the appropriate DDC pin is still available when initializing a HDMI connector. Signed-off-by: Ville Syrjälä --- drivers/gpu/drm/i915/display/intel_bios.c | 69 ---------------------- drivers/gpu/drm/i915/display/intel_hdmi.c | 72 +++++++++++++++++++---- 2 files changed, 59 insertions(+), 82 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 34a397adbd6b..439ab5b3cbe5 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -2230,72 +2230,6 @@ static u8 map_ddc_pin(struct drm_i915_private *i915, u8 vbt_pin) return 0; } -static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin) -{ - enum port port; - - if (!ddc_pin) - return PORT_NONE; - - for_each_port(port) { - const struct intel_bios_encoder_data *devdata = - i915->display.vbt.ports[port]; - - if (devdata && ddc_pin == devdata->child.ddc_pin) - return port; - } - - return PORT_NONE; -} - -static void sanitize_ddc_pin(struct intel_bios_encoder_data *devdata, - enum port port) -{ - struct drm_i915_private *i915 = devdata->i915; - struct child_device_config *child; - u8 mapped_ddc_pin; - enum port p; - - if (!devdata->child.ddc_pin) - return; - - mapped_ddc_pin = map_ddc_pin(i915, devdata->child.ddc_pin); - if (!intel_gmbus_is_valid_pin(i915, mapped_ddc_pin)) { - drm_dbg_kms(&i915->drm, - "Port %c has invalid DDC pin %d, " - "sticking to defaults\n", - port_name(port), mapped_ddc_pin); - devdata->child.ddc_pin = 0; - return; - } - - p = get_port_by_ddc_pin(i915, devdata->child.ddc_pin); - if (p == PORT_NONE) - return; - - drm_dbg_kms(&i915->drm, - "port %c trying to use the same DDC pin (0x%x) as port %c, " - "disabling port %c DVI/HDMI support\n", - port_name(port), mapped_ddc_pin, - port_name(p), port_name(p)); - - /* - * If we have multiple ports supposedly sharing the pin, then dvi/hdmi - * couldn't exist on the shared port. Otherwise they share the same ddc - * pin and system couldn't communicate with them separately. - * - * Give inverse child device order the priority, last one wins. Yes, - * there are real machines (eg. Asrock B250M-HDV) where VBT has both - * port A and port E with the same AUX ch and we must pick port E :( - */ - child = &i915->display.vbt.ports[p]->child; - - child->device_type &= ~DEVICE_TYPE_TMDS_DVI_SIGNALING; - child->device_type |= DEVICE_TYPE_NOT_HDMI_OUTPUT; - - child->ddc_pin = 0; -} - static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch) { enum port port; @@ -2753,9 +2687,6 @@ static void parse_ddi_port(struct intel_bios_encoder_data *devdata) sanitize_device_type(devdata, port); - if (intel_bios_encoder_supports_dvi(devdata)) - sanitize_ddc_pin(devdata, port); - if (intel_bios_encoder_supports_dp(devdata)) sanitize_aux_ch(devdata, port); diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index 7ac5e6c5e00d..8d1c8abfcffa 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -2880,21 +2880,12 @@ static u8 g4x_port_to_ddc_pin(struct drm_i915_private *dev_priv, return ddc_pin; } -static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder) +static u8 intel_hdmi_default_ddc_pin(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); enum port port = encoder->port; u8 ddc_pin; - ddc_pin = intel_bios_hdmi_ddc_pin(encoder->devdata); - if (ddc_pin) { - drm_dbg_kms(&dev_priv->drm, - "[ENCODER:%d:%s] Using DDC pin 0x%x (VBT)\n", - encoder->base.base.id, encoder->base.name, - ddc_pin); - return ddc_pin; - } - if (IS_ALDERLAKE_S(dev_priv)) ddc_pin = adls_port_to_ddc_pin(dev_priv, port); else if (INTEL_PCH_TYPE(dev_priv) >= PCH_DG1) @@ -2916,10 +2907,62 @@ static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder) else ddc_pin = g4x_port_to_ddc_pin(dev_priv, port); - drm_dbg_kms(&dev_priv->drm, - "[ENCODER:%d:%s] Using DDC pin 0x%x (platform default)\n", + return ddc_pin; +} + +static struct intel_encoder * +get_encoder_by_ddc_pin(struct intel_encoder *encoder, u8 ddc_pin) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_encoder *other; + + for_each_intel_encoder(&i915->drm, other) { + if (other == encoder) + continue; + + if (!intel_encoder_is_dig_port(other)) + continue; + + if (enc_to_dig_port(other)->hdmi.ddc_bus == ddc_pin) + return other; + } + + return NULL; +} + +static u8 intel_hdmi_ddc_pin(struct intel_encoder *encoder) +{ + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_encoder *other; + const char *source; + u8 ddc_pin; + + ddc_pin = intel_bios_hdmi_ddc_pin(encoder->devdata); + source = "VBT"; + + if (!ddc_pin) { + ddc_pin = intel_hdmi_default_ddc_pin(encoder); + source = "platform default"; + } + + if (!intel_gmbus_is_valid_pin(i915, ddc_pin)) { + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] Invalid DDC pin %d\n", + encoder->base.base.id, encoder->base.name, ddc_pin); + return 0; + } + + other = get_encoder_by_ddc_pin(encoder, ddc_pin); + if (other) { + drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] DDC pin %d already claimed by [ENCODER:%d:%s]\n", + encoder->base.base.id, encoder->base.name, ddc_pin, + other->base.base.id, other->base.name); + return 0; + } + + drm_dbg_kms(&i915->drm, + "[ENCODER:%d:%s] Using DDC pin 0x%x (%s)\n", encoder->base.base.id, encoder->base.name, - ddc_pin); + ddc_pin, source); return ddc_pin; } @@ -2990,6 +3033,9 @@ void intel_hdmi_init_connector(struct intel_digital_port *dig_port, return; intel_hdmi->ddc_bus = intel_hdmi_ddc_pin(intel_encoder); + if (!intel_hdmi->ddc_bus) + return; + ddc = intel_gmbus_get_adapter(dev_priv, intel_hdmi->ddc_bus); drm_connector_init_with_ddc(dev, connector, -- 2.39.3