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 7AE271FECB5; Sun, 26 Jan 2025 14:56:43 +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=1737903403; cv=none; b=V7XGowRT3McXOPb+AKy0L2T8XfOpLKO0mnoklmUVEmEBlqPiBpHSgEh5bZC7VyuMWLpxNaJ3iPfoFPfbaaz4D54G4uJjnlPWq5MVXvM/qfBmFD2KSkmPV3ORqmDnL8UvJPpT5N4k1mOiyGmaBLhcFtYnjfT9wjxZDyuKvYHuDTQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737903403; c=relaxed/simple; bh=EYeNoB9koWpUFTbp2OxIGhh43vb3HTXkAsts9x5F0IM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=glyUuUwxfoaO+ZRn7b5FVXiXg3nQP0Thz+Tk3TdTPMeZdFf4kgdDmR0odfPY2Ajyw+yu5Jb7/syvWQfQ38D5pTNyY2GQVgRlQUagRp3/Qh3Z/U9rKEvP+ODt4ULnyDgWtSXltFXaNk7cEet2MlsHmVYwzCctoGpBKipG65aJJvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UsMkYQ7i; 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="UsMkYQ7i" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4045C4CED3; Sun, 26 Jan 2025 14:56:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737903403; bh=EYeNoB9koWpUFTbp2OxIGhh43vb3HTXkAsts9x5F0IM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UsMkYQ7iDMwQ1zbDXoZwkrLfFtGM7my8UXSwrMjXpl9jTwg0Z03N/nrmCHqd3t6WW gFlkUMpVzA2gaGp9CDXUuDH7xLDApZIk/PxkoasAAO9e0CpMTOTlf6LLclQdrUNGZg +XJkQCfD9Gvhh/MGhiUI3BSyzvXdQZYYsSAmCF2C+tF0VuY9Iw+5a9Du5t3QRn720E xVB8VXmd+RtIyjMB3ameZyH/WKiBs/FZv8JzykftlWcINnxAq2e2cVNjqrOHIRzzVd y3puIqLa9z13+jF93NRmtkHSFga1kTD/isd6APhqNGZijEPjiHVHZudW5184LHfoUc 15nEBrsWX5K7Q== 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 6.6 13/17] drm/bridge: it6505: fix HDCP Bstatus check Date: Sun, 26 Jan 2025 09:56:08 -0500 Message-Id: <20250126145612.937679-13-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250126145612.937679-1-sashal@kernel.org> References: <20250126145612.937679-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.74 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 b7f70c8d14473..0eb831686a6ea 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -2309,14 +2309,20 @@ 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