From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 26E6A1FBC93; Sun, 26 Jan 2025 14:55:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903357; cv=none; b=Lo+TyXdEqRuUkWDJcMUnV6w/rlqw9EPMnE1fH4Q2ZSUu3u6uhf0ziyVpaiR1HbYXu1fRWuCwBg5HebIzXMBQpZr3FrtL+XnS7RmvB29wjTrP/0GITzoAMV7MpY0DIgHiZhxzhULMH6bQSodVDsPOAV308yrj7Ao1m1BMwUBPCNE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903357; c=relaxed/simple; bh=BssESIkw06CVRogxAwU7ifDk0FhlJJHOfQEIwD4Dfbc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cH45+qjVXd5acn+r8hFdsHiYif2NhHD4LUZrGWc5FRVDLkRRoO1X+PPCwBBoXkYFL8jFM0JN9bsCYPGuic3kHclWEVBockCyQ5Hz1pUQZCRJc3VZFZUiaFfM/hFW1h1f69FOe5CD8gIJj4l3RvcENkfYG0IaZNwGIKxe6Mun2aI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=r5LNLTnS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="r5LNLTnS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C264C4CED3; Sun, 26 Jan 2025 14:55:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903357; bh=BssESIkw06CVRogxAwU7ifDk0FhlJJHOfQEIwD4Dfbc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r5LNLTnStb2RPxb5dy0DKhYFKND8MJJhT65AOdGoe6jst64fVtQ3d1AqHLAYV/eqS brKKl2da29iZzu5FSKE8PB289KUcpXPrA/f5l03NFgeNucWhAK13p0m4kookT3MwHr 9b/gaZ8Xyn3gtcOyZhijDkdgpIp79AnlKgFef3hrgI39nm+vaLKErOGu1sRvSkJyV/ HNlKCbZThcAEbnehJBF6hu9SrS1SkXGZbOUaTk84URuzMIzORFIa4698OydHIqSVk5 6FNO/97eifAKyze30UVKAXZg72I6+q1LD3bWvxWYEAhN3UYuoYFY9YPsz/M2VunMxJ majDjB5K7tklw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hermes Wu , Dmitry Baryshkov , AngeloGioacchino Del Regno , Sasha Levin , andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.12 24/31] drm/bridge: it6505: fix HDCP Bstatus check Date: Sun, 26 Jan 2025 09:54:40 -0500 Message-Id: <20250126145448.930220-24-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145448.930220-1-sashal@kernel.org> References: <20250126145448.930220-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.12.11 Content-Transfer-Encoding: 8bit From: Hermes Wu [ Upstream commit 0fd2ff47d8c207fa3173661de04bb9e8201c0ad2 ] When HDCP is activated, a DisplayPort source receiving CP_IRQ from the sink shall check Bstatus from DPCD and process the corresponding value Reviewed-by: Dmitry Baryshkov Signed-off-by: Hermes Wu Reviewed-by: AngeloGioacchino Del Regno Signed-off-by: Dmitry Baryshkov Link: https://patchwork.freedesktop.org/patch/msgid/20241230-v7-upstream-v7-5-e0fdd4844703@ite.corp-partner.google.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ite-it6505.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index e6ba2dcc4ad00..e8dac873a92c9 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -2312,14 +2312,20 @@ static int it6505_process_hpd_irq(struct it6505 *it6505) DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector); if (dp_irq_vector & DP_CP_IRQ) { - it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, - HDCP_TRIGGER_CPIRQ); - bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS); if (bstatus < 0) return bstatus; DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus); + + /*Check BSTATUS when recive CP_IRQ */ + if (bstatus & DP_BSTATUS_R0_PRIME_READY && + it6505->hdcp_status == HDCP_AUTH_GOING) + it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, + HDCP_TRIGGER_CPIRQ); + else if (bstatus & (DP_BSTATUS_REAUTH_REQ | DP_BSTATUS_LINK_FAILURE) && + it6505->hdcp_status == HDCP_AUTH_DONE) + it6505_start_hdcp(it6505); } ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status); -- 2.39.5