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From: Jagan Teki <jagan@amarulasolutions.com>
To: Inki Dae <inki.dae@samsung.com>,
	Joonyoung Shim <jy0922.shim@samsung.com>,
	Seung-Woo Kim <sw0312.kim@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Robert Foss <robert.foss@linaro.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Frieder Schrempf <frieder.schrempf@kontron.de>,
	Daniel Vetter <daniel.vetter@intel.com>,
	Marek Vasut <marex@denx.de>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Fabio Estevam <festevam@gmail.com>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	NXP Linux Team <linux-imx@nxp.com>,
	linux-amarula <linux-amarula@amarulasolutions.com>,
	Jagan Teki <jagan@amarulasolutions.com>
Subject: [RFC PATCH 11/17] drm: bridge: samsung-dsim: Find the possible DSI devices
Date: Sun,  4 Jul 2021 14:32:24 +0530	[thread overview]
Message-ID: <20210704090230.26489-12-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20210704090230.26489-1-jagan@amarulasolutions.com>

Finding panel_or_bridge might vary based on associated
DSI device drivers like DSI panel, bridge, and I2C based
DSI bridge.

All of these DSI drivers will invoke the DSI host in order
to find the panel_or_bridge from probe to host attach and
bridge_attach to host bridge attach.

So, in order to handle all these cases of finding the
panel_or_bridge invoke the finding API in host attach and
bridge attach with the DSIM_STATE_DEVICE_FOUND flag.

This way we can handle all possible cases of finding the
DSI devices.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 2222c27feffd..9a2df1212d0f 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -248,6 +248,7 @@ struct samsung_dsim_transfer {
 #define DSIM_STATE_INITIALIZED		BIT(1)
 #define DSIM_STATE_CMD_LPM		BIT(2)
 #define DSIM_STATE_VIDOUT_AVAILABLE	BIT(3)
+#define DSIM_STATE_DEVICE_FOUND		BIT(4)
 
 struct samsung_dsim_driver_data {
 	const unsigned int *reg_ofs;
@@ -1475,6 +1476,15 @@ static int samsung_dsim_bridge_attach(struct drm_bridge *bridge,
 				      enum drm_bridge_attach_flags flags)
 {
 	struct samsung_dsim *dsi = bridge_to_dsi(bridge);
+	int ret;
+
+	if (!(dsi->state & DSIM_STATE_DEVICE_FOUND)) {
+		ret = samsung_dsim_panel_or_bridge(dsi, dsi->dev->of_node);
+		if (ret)
+			return ret;
+
+		dsi->state |= DSIM_STATE_DEVICE_FOUND;
+	}
 
 	dsi->drm = bridge->dev;
 
@@ -1498,9 +1508,13 @@ static int samsung_dsim_host_attach(struct mipi_dsi_host *host,
 	struct drm_device *drm = dsi->drm;
 	int ret;
 
-	ret = samsung_dsim_panel_or_bridge(dsi, device->dev.of_node);
-	if (ret)
-		return ret;
+	if (!(dsi->state & DSIM_STATE_DEVICE_FOUND)) {
+		ret = samsung_dsim_panel_or_bridge(dsi, device->dev.of_node);
+		if (ret)
+			return ret;
+
+		dsi->state |= DSIM_STATE_DEVICE_FOUND;
+	}
 
 	/*
 	 * This is a temporary solution and should be made by more generic way.
-- 
2.25.1


  parent reply	other threads:[~2021-07-04  9:05 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-04  9:02 [RFC PATCH 00/17] drm: bridge: Samsung MIPI DSIM bridge Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 01/17] drm/exynos: dsi: Convert to bridge driver Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 02/17] drm/exynos: dsi: Handle drm_device for bridge Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 03/17] drm/exynos: dsi: Use the drm_panel_bridge API Jagan Teki
2021-07-05 11:47   ` Marek Szyprowski
2021-07-05 12:00     ` Jagan Teki
2021-07-05 12:13       ` Marek Szyprowski
2021-07-05 12:34         ` Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 04/17] drm/exynos: dsi: Create bridge connector for encoder Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 05/17] drm/exynos: dsi: Get the mode from bridge Jagan Teki
2021-07-29 13:20   ` Robert Foss
2021-07-04  9:02 ` [RFC PATCH 06/17] drm/exynos: dsi: Handle exynos specifics via driver_data Jagan Teki
     [not found]   ` <YP2el40V3K4R7ner@ravnborg.org>
2021-07-25 17:31     ` Jagan Teki
2021-08-13  6:50     ` Inki Dae
2021-08-13 12:16       ` Laurent Pinchart
2021-08-18  6:09         ` Inki Dae
2021-07-04  9:02 ` [RFC PATCH 07/17] drm: bridge: Move exynos_drm_dsi into bridges Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 08/17] dt-bindings: display: bridge: Add Samsung MIPI DSIM bridge Jagan Teki
2021-07-12 15:13   ` Rob Herring
2021-07-12 15:23     ` Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 09/17] drm: bridge: samsung-dsim: Add module init, exit Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 10/17] drm: bridge: samsung-dsim: Update the of_node for port(s) Jagan Teki
2021-07-04  9:02 ` Jagan Teki [this message]
2021-07-04  9:02 ` [RFC PATCH 12/17] dt-bindings: display: bridge: samsung,mipi-dsim: Add i.MX8MM support Jagan Teki
2021-07-14 22:59   ` Rob Herring
2021-07-04  9:02 ` [RFC PATCH 13/17] drm: bridge: samsung-dsim: " Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 14/17] drm: bridge: samsung-dsim: Add input_bus_flags Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 15/17] drm: bridge: samsung-dsim: Move DSI init in bridge enable Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 16/17] drm: bridge: samsung-dsim: Fix PLL_P offset Jagan Teki
2021-07-04  9:02 ` [RFC PATCH 17/17] drm: bridge: samsung-dsim: Add bridge mode_fixup Jagan Teki
     [not found] ` <YP2ZvoVQyvwTXP++@ravnborg.org>
2021-07-25 17:13   ` [RFC PATCH 00/17] drm: bridge: Samsung MIPI DSIM bridge Jagan Teki
2021-10-05 21:43     ` Tim Harvey
2021-12-09  8:36       ` Michael Nazzareno Trimarchi
2021-12-09 16:40         ` Tim Harvey
2021-12-09 17:09           ` Michael Nazzareno Trimarchi
2021-12-09 17:57             ` Tim Harvey
2021-12-09 20:24             ` Lucas Stach
2021-12-09 21:24               ` Michael Nazzareno Trimarchi
2021-12-15 13:34                 ` Adam Ford

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