linux-kernel - [PATCH v6 2/4] drm: bridge: samsung-dsim: complete the CLKLANE

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Date:   Wed, 13 Dec 2023 15:03:43 +0100
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     michael@...rulasolutions.com,
        Amarula patchwork <linux-amarula@...rulasolutions.com>,
        Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Inki Dae <inki.dae@...sung.com>,
        Jagan Teki <jagan@...rulasolutions.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Jonas Karlman <jonas@...boo.se>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Maxime Ripard <mripard@...nel.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH v6 2/4] drm: bridge: samsung-dsim: complete the CLKLANE_STOP setting

The patch completes the setting of CLKLANE_STOP for the imx8mn and imx8mp
platforms (i. e. not exynos).

Co-developed-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---

(no changes since v1)

 drivers/gpu/drm/bridge/samsung-dsim.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 15bf05b2bbe4..13f181c99d7e 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -96,6 +96,7 @@
 #define DSIM_MFLUSH_VS			BIT(29)
 /* This flag is valid only for exynos3250/3472/5260/5430 */
 #define DSIM_CLKLANE_STOP		BIT(30)
+#define DSIM_NON_CONTINUOUS_CLKLANE	BIT(31)
 
 /* DSIM_ESCMODE */
 #define DSIM_TX_TRIGGER_RST		BIT(4)
@@ -945,8 +946,12 @@ static int samsung_dsim_init_link(struct samsung_dsim *dsi)
 	 * power consumption.
 	 */
 	if (driver_data->has_clklane_stop &&
-	    dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
+	    dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) {
+		if (!samsung_dsim_hw_is_exynos(dsi->plat_data->hw_type))
+			reg |= DSIM_NON_CONTINUOUS_CLKLANE;
+
 		reg |= DSIM_CLKLANE_STOP;
+	}
 	samsung_dsim_write(dsi, DSIM_CONFIG_REG, reg);
 
 	lanes_mask = BIT(dsi->lanes) - 1;
-- 
2.43.0