linux-kernel - [PATCH v2 1/5] drm/bridge: samsung-dsim: add more mipi-dsi device debug information

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Date:   Fri, 06 Oct 2023 17:07:03 +0200
From:   Michael Tretter <m.tretter@...gutronix.de>
To:     Inki Dae <inki.dae@...sung.com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, Michael Tretter <m.tretter@...gutronix.de>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Adam Ford <aford173@...il.com>,
        Frieder Schrempf <frieder.schrempf@...tron.de>
Subject: [PATCH v2 1/5] drm/bridge: samsung-dsim: add more mipi-dsi device
 debug information

From: Marco Felsch <m.felsch@...gutronix.de>

Since the MIPI configuration can be changed on demand it is very useful
to print more MIPI settings during the MIPI device attach step.

Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
Reviewed-by: Adam Ford <aford173@...il.com>  #imx8mm-beacon
Tested-by: Adam Ford <aford173@...il.com>  #imx8mm-beacon
Reviewed-by: Inki Dae <inki.dae@...sung.com>
Acked-by: Inki Dae <inki.dae@...sung.com>
Tested-by: Frieder Schrempf <frieder.schrempf@...tron.de> # Kontron BL i.MX8MM + Waveshare 10.1inch HDMI LCD (E)
Reviewed-by: Marco Felsch <m.felsch@...gutronix.de>
Signed-off-by: Michael Tretter <m.tretter@...gutronix.de>

---
Changes in v2: None
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index cf777bdb25d2..3e8ee9d73a72 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -1712,7 +1712,10 @@ static int samsung_dsim_host_attach(struct mipi_dsi_host *host,
 		return ret;
 	}
 
-	DRM_DEV_INFO(dev, "Attached %s device\n", device->name);
+	DRM_DEV_INFO(dev, "Attached %s device (lanes:%d bpp:%d mode-flags:0x%lx)\n",
+		     device->name, device->lanes,
+		     mipi_dsi_pixel_format_to_bpp(device->format),
+		     device->mode_flags);
 
 	drm_bridge_add(&dsi->bridge);
 

-- 
2.39.2