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From: Maciej Purski <m.purski@samsung.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org,
	dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Kukjin Kim <kgene@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Archit Taneja <architt@codeaurora.org>,
	Andrzej Hajda <a.hajda@samsung.com>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	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>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Maciej Purski <m.purski@samsung.com>
Subject: [PATCH v2 02/10] drm/exynos: move pm_runtime_get_sync() to exynos_dsi_init()
Date: Wed, 30 May 2018 14:15:53 +0200	[thread overview]
Message-ID: <1527682561-1386-3-git-send-email-m.purski@samsung.com> (raw)
In-Reply-To: <1527682561-1386-1-git-send-email-m.purski@samsung.com>

In order to allow bridge drivers to use DSI transfers in their
pre_enable callbacks, pm_runtime_get_sync() should be performed before
exynos_dsi_enable(). DSIM_STATE_ENABLED flag now should not guard
from calling dsi_host_transfer() before enabling.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_dsi.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 9599e6b..85eb2262 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1312,6 +1312,7 @@ static int exynos_dsi_init(struct exynos_dsi *dsi)
 {
 	const struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
 
+	pm_runtime_get_sync(dsi->dev);
 	exynos_dsi_reset(dsi);
 	exynos_dsi_enable_irq(dsi);
 
@@ -1388,7 +1389,6 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
 	ret = drm_panel_prepare(dsi->panel);
 	if (ret < 0) {
 		dsi->state &= ~DSIM_STATE_ENABLED;
-		pm_runtime_put_sync(dsi->dev);
 		return;
 	}
 
@@ -1400,7 +1400,6 @@ static void exynos_dsi_enable(struct drm_encoder *encoder)
 		dsi->state &= ~DSIM_STATE_ENABLED;
 		exynos_dsi_set_display_enable(dsi, false);
 		drm_panel_unprepare(dsi->panel);
-		pm_runtime_put_sync(dsi->dev);
 		return;
 	}
 
@@ -1422,7 +1421,10 @@ static void exynos_dsi_disable(struct drm_encoder *encoder)
 
 	dsi->state &= ~DSIM_STATE_ENABLED;
 
-	pm_runtime_put_sync(dsi->dev);
+	if (dsi->state & DSIM_STATE_INITIALIZED) {
+		pm_runtime_put_sync(dsi->dev);
+		dsi->state &= ~DSIM_STATE_INITIALIZED;
+	}
 }
 
 static enum drm_connector_status
@@ -1566,9 +1568,6 @@ static ssize_t exynos_dsi_host_transfer(struct mipi_dsi_host *host,
 	struct exynos_dsi_transfer xfer;
 	int ret;
 
-	if (!(dsi->state & DSIM_STATE_ENABLED))
-		return -EINVAL;
-
 	if (!(dsi->state & DSIM_STATE_INITIALIZED)) {
 		ret = exynos_dsi_init(dsi);
 		if (ret)
-- 
2.7.4

  parent reply	other threads:[~2018-05-30 12:16 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20180530121622eucas1p1015b65cd12a544b1ea72fe6bfd1a3ccc@eucas1p1.samsung.com>
2018-05-30 12:15 ` [PATCH v2 00/10] Add TOSHIBA TC358764 DSI/LVDS bridge driver Maciej Purski
     [not found]   ` <CGME20180530121623eucas1p27e08223bc5b04dbb0b0253c18a9f83d5@eucas1p2.samsung.com>
2018-05-30 12:15     ` [PATCH v2 01/10] drm/exynos: rename "bridge_node" to "mic_bridge_node" Maciej Purski
2018-06-25  2:37       ` Inki Dae
     [not found]   ` <CGME20180530121623eucas1p1309b2c054ccd7a52a611b46346709af9@eucas1p1.samsung.com>
2018-05-30 12:15     ` Maciej Purski [this message]
     [not found]   ` <CGME20180530121624eucas1p2678b6a5424cb8df286b6142cd3754b65@eucas1p2.samsung.com>
2018-05-30 12:15     ` [PATCH v2 03/10] drm/exynos: move connector creation to attach callback Maciej Purski
     [not found]   ` <CGME20180530121625eucas1p239693227eda97d090f3bfe530ded0c52@eucas1p2.samsung.com>
2018-05-30 12:15     ` [PATCH v2 04/10] drm/exynos: add non-panel path to exynos_dsi_enable() Maciej Purski
     [not found]   ` <CGME20180530121626eucas1p288656bbbace0c333decadff418e13c34@eucas1p2.samsung.com>
2018-05-30 12:15     ` [PATCH v2 05/10] panel/hv070wsa-100: add DT bindings Maciej Purski
2018-05-31  4:00       ` Rob Herring
     [not found]   ` <CGME20180530121626eucas1p17699adbe488cfb34da3f648bffe97fa2@eucas1p1.samsung.com>
2018-05-30 12:15     ` [PATCH v2 06/10] drm/panel: add support for BOE HV070WSA-100 panel to simple-panel Maciej Purski
     [not found]   ` <CGME20180530121627eucas1p1c8daf24d7c95e9e8b04a523d4662dfd9@eucas1p1.samsung.com>
2018-05-30 12:15     ` [PATCH v2 07/10] dt-bindings: tc358754: add DT bindings Maciej Purski
2018-05-30 12:36       ` Laurent Pinchart
2018-06-18 11:07         ` Maciej Purski
2018-05-31  4:02       ` Rob Herring
2018-06-18 11:23         ` Maciej Purski
     [not found]   ` <CGME20180530121628eucas1p291c2774152145231a0a5c4ed56354d7f@eucas1p2.samsung.com>
2018-05-30 12:15     ` [PATCH v2 08/10] drm/bridge: tc358764: Add DSI to LVDS bridge driver Maciej Purski
2018-05-31  6:51       ` Archit Taneja
2018-06-18 11:20         ` Maciej Purski
     [not found]   ` <CGME20180530121629eucas1p2cc1a8c3f5a8e704f4d6f3cf75834cf00@eucas1p2.samsung.com>
2018-05-30 12:16     ` [PATCH v2 09/10] ARM: dts: exynos5250: add DSI node Maciej Purski
2018-05-30 14:32       ` Krzysztof Kozlowski
     [not found]   ` <CGME20180530121630eucas1p1584c59b67815a65d0747afab214979ef@eucas1p1.samsung.com>
2018-05-30 12:16     ` [PATCH v2 10/10] ARM: dts: exynos5250-arndale: add DSI and panel nodes Maciej Purski

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