From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 F3FEE2F12AE; Tue, 16 Jun 2026 18:07:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633280; cv=none; b=pMfD4f/zmqVFW3+f26LDuRNIIYIYEUPhUWM1K5sQYIbofPULrQ5+6TVZDEEaZoCNIj4lags6zXUx/qKDj2HYcRrGvU+67zx4zgsYDWx90un7SL3XetC/QvdXawCwaFHGVk3eNLtd9qQFipOYjHLF0noyajK8hKhKgktUi1whyp8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781633280; c=relaxed/simple; bh=VVA5aCvsh/Q9ewFiv0yLCR+YHsoS+sAK3+qvd2iX0G0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=iiGkNzPBFHbKoe4WmOiKY0WD+1i37kMYjMrpEv+xbLIccVWvGryDNoqPzUH2UNZHRJj3YRjKnk5d/8yzqNL7j+N/dAWQ8R6YHQHmQSErQkIy3gZsCwZJwYfA4ghznCCp7AWSep0TNHMnFwNo3uJqjdaAShEaTlr/Uhdnzy9SPIU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=RuGN3Aml; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="RuGN3Aml" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 026411F000E9; Tue, 16 Jun 2026 18:07:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781633278; bh=YB3FAeJbyKe3OSB0qHW9Uom86Ie2QzvlLf5+NTKSfjM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RuGN3AmlfxcSL5HXZc/dFPqf+8Vq0/9PRA0vzc6P+JhdjTDbRgzg1ta8kAk+wl8dL bvY3KwCHiX1b7Caw3Xf9mQ+Yh5JMyIcQzrNduEi+5jBNWFconEUycUKlvMKjIm9RvE e52cPn8yMc/lcnLJFQClllRLJsZh3dzzHVvYumCw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Jouni=20H=C3=B6gander?= , Suraj Kandpal , Tvrtko Ursulin , Sasha Levin Subject: [PATCH 5.15 047/411] drm/i915/psr: Read Intel DPCD workaround register Date: Tue, 16 Jun 2026 20:24:45 +0530 Message-ID: <20260616145102.784739318@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145100.376842714@linuxfoundation.org> References: <20260616145100.376842714@linuxfoundation.org> User-Agent: quilt/0.69 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jouni Högander commit f30bece421a4ae34359254e1dc2a187a42b6af9b upstream. Read Intel DPCD workaround register and store it into intel_connector->dp.psr_caps. psr_caps was chosen as currently it contains only PSR workaround for PSR2 SDP on prior scanline implementation. Signed-off-by: Jouni Högander Reviewed-by: Suraj Kandpal Link: https://patch.msgid.link/20260515095756.2799483-3-jouni.hogander@intel.com (cherry picked from commit c48ff24d0f4ab7ad696b2d35ad64ce7e049c668c) Signed-off-by: Tvrtko Ursulin Signed-off-by: Sasha Levin --- drivers/gpu/drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_psr.c | 7 +++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index 90e055f0569940..ef4c280d2cb630 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1554,6 +1554,7 @@ struct intel_dp { u8 lttpr_phy_caps[DP_MAX_LTTPR_COUNT][DP_LTTPR_PHY_CAP_SIZE]; u8 fec_capable; u8 pcon_dsc_dpcd[DP_PCON_DSC_ENCODER_CAP_SIZE]; + u8 intel_wa_dpcd; /* source rates */ int num_source_rates; const int *source_rates; diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 93d2fd4cd16b7c..aa00e062a2a6aa 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -30,6 +30,7 @@ #include "intel_atomic.h" #include "intel_de.h" #include "intel_display_types.h" +#include "intel_dpcd.h" #include "intel_dp_aux.h" #include "intel_hdmi.h" #include "intel_psr.h" @@ -363,6 +364,12 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp) intel_dp_get_su_granularity(intel_dp); } } + + if (intel_dp->psr.sink_psr2_support) + drm_dp_dpcd_read(&intel_dp->aux, + INTEL_DPCD_INTEL_WA_REGISTER_CAPS, + &intel_dp->intel_wa_dpcd, + sizeof(intel_dp->intel_wa_dpcd)); } static void hsw_psr_setup_aux(struct intel_dp *intel_dp) -- 2.53.0