Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.32 as permitted sender) client-ip=23.128.96.32;
From:   Maxime Ripard <mripard@kernel.org>
Date:   Wed, 20 Sep 2023 16:35:43 +0200
Subject: [PATCH RFC v2 28/37] drm/rockchip: inno_hdmi: Move infoframe
 disable to separate function
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Message-Id: <20230920-kms-hdmi-connector-state-v2-28-17932daddd7d@kernel.org>
References: <20230920-kms-hdmi-connector-state-v2-0-17932daddd7d@kernel.org>
In-Reply-To: <20230920-kms-hdmi-connector-state-v2-0-17932daddd7d@kernel.org>
To:     Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>, Emma Anholt <emma@anholt.net>,
        Jonathan Corbet <corbet@lwn.net>,
        Sandy Huang <hjc@rock-chips.com>,
        =?utf-8?q?Heiko_St=C3=BCbner?= <heiko@sntech.de>,
        Chen-Yu Tsai <wens@csie.org>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Samuel Holland <samuel@sholland.org>
Cc:     Hans Verkuil <hverkuil@xs4all.nl>, dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev,
        Maxime Ripard <mripard@kernel.org>
Precedence: bulk

The code to upload infoframes to the controller uses a weird construct
which, based on the previous function call return code, will either
disable or enable that infoframe.

In order to get rid of that argument, let's split the function to
disable the infoframe into a separate function and make it obvious what
we are doing in the error path.

Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
 drivers/gpu/drm/rockchip/inno_hdmi.c | 53 +++++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c
index 59b2b676b7b8..e3a421d98dd4 100644
--- a/drivers/gpu/drm/rockchip/inno_hdmi.c
+++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
@@ -156,33 +156,38 @@ static void inno_hdmi_reset(struct inno_hdmi *hdmi)
 	inno_hdmi_set_pwr_mode(hdmi, NORMAL);
 }
 
-static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi, int setup_rc,
-				  union hdmi_infoframe *frame, u32 frame_index,
-				  u32 mask, u32 disable, u32 enable)
+static void inno_hdmi_disable_frame(struct inno_hdmi *hdmi,
+				    u32 frame_index,
+				    u32 mask, u32 disable)
 {
 	if (mask)
 		hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, disable);
 
 	hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, frame_index);
+}
 
-	if (setup_rc >= 0) {
-		u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
-		ssize_t rc, i;
+static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi,
+				  union hdmi_infoframe *frame, u32 frame_index,
+				  u32 mask, u32 disable, u32 enable)
+{
+	u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
+	ssize_t rc, i;
 
-		rc = hdmi_infoframe_pack(frame, packed_frame,
-					 sizeof(packed_frame));
-		if (rc < 0)
-			return rc;
+	inno_hdmi_disable_frame(hdmi, frame_index, mask, disable);
 
-		for (i = 0; i < rc; i++)
-			hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
-				    packed_frame[i]);
+	rc = hdmi_infoframe_pack(frame, packed_frame,
+				 sizeof(packed_frame));
+	if (rc < 0)
+		return rc;
 
-		if (mask)
-			hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
-	}
+	for (i = 0; i < rc; i++)
+		hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
+			    packed_frame[i]);
 
-	return setup_rc;
+	if (mask)
+		hdmi_modb(hdmi, HDMI_PACKET_SEND_AUTO, mask, enable);
+
+	return 0;
 }
 
 static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
@@ -194,8 +199,13 @@ static int inno_hdmi_config_video_vsi(struct inno_hdmi *hdmi,
 	rc = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi,
 							 &hdmi->connector,
 							 mode);
+	if (rc) {
+		inno_hdmi_disable_frame(hdmi, INFOFRAME_VSI,
+					m_PACKET_VSI_EN, v_PACKET_VSI_EN(0));
+		return rc;
+	}
 
-	return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_VSI,
+	return inno_hdmi_upload_frame(hdmi, &frame, INFOFRAME_VSI,
 		m_PACKET_VSI_EN, v_PACKET_VSI_EN(0), v_PACKET_VSI_EN(1));
 }
 
@@ -208,9 +218,14 @@ static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
 	rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
 						      &hdmi->connector,
 						      mode);
+	if (rc) {
+		inno_hdmi_disable_frame(hdmi, INFOFRAME_AVI, 0, 0);
+		return rc;
+	}
+
 	frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
-	return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0, 0);
+	return inno_hdmi_upload_frame(hdmi, &frame, INFOFRAME_AVI, 0, 0, 0);
 }
 
 static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)

-- 
2.41.0