From: Sean Anderson <sean.anderson@linux.dev> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>, dri-devel@lists.freedesktop.org Cc: Daniel Vetter <daniel@ffwll.ch>, linux-arm-kernel@lists.infradead.org, Michal Simek <michal.simek@amd.com>, linux-kernel@vger.kernel.org, David Airlie <airlied@gmail.com>, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>, Sean Anderson <sean.anderson@linux.dev> Subject: [PATCH v4 12/13] drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func Date: Tue, 23 Apr 2024 13:18:58 -0400 [thread overview] Message-ID: <20240423171859.3953024-13-sean.anderson@linux.dev> (raw) In-Reply-To: <20240423171859.3953024-1-sean.anderson@linux.dev> Add a non-locking version of zynqmp_dp_bridge_detect and use it in zynqmp_dp_hpd_work_func so we can take the lock explicitly. This will make it easier to check for hpd_ignore when we add debugfs support. Signed-off-by: Sean Anderson <sean.anderson@linux.dev> --- (no changes since v3) Changes in v3: - New drivers/gpu/drm/xlnx/zynqmp_dp.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index d5ee165046f8..fe002fef4662 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1552,14 +1552,13 @@ static int zynqmp_dp_bridge_atomic_check(struct drm_bridge *bridge, return 0; } -static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_dp *dp) { - struct zynqmp_dp *dp = bridge_to_dp(bridge); struct zynqmp_dp_link_config *link_config = &dp->link_config; u32 state, i; int ret; - mutex_lock(&dp->lock); + lockdep_assert_held(&dp->lock); /* * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to @@ -1588,16 +1587,26 @@ static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *brid dp->num_lanes); dp->status = connector_status_connected; - mutex_unlock(&dp->lock); return connector_status_connected; } disconnected: dp->status = connector_status_disconnected; - mutex_unlock(&dp->lock); return connector_status_disconnected; } +static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +{ + struct zynqmp_dp *dp = bridge_to_dp(bridge); + enum drm_connector_status ret; + + mutex_lock(&dp->lock); + ret = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + + return ret; +} + static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge *bridge, struct drm_connector *connector) { @@ -1651,7 +1660,10 @@ static void zynqmp_dp_hpd_work_func(struct work_struct *work) struct zynqmp_dp *dp = container_of(work, struct zynqmp_dp, hpd_work); enum drm_connector_status status; - status = zynqmp_dp_bridge_detect(&dp->bridge); + mutex_lock(&dp->lock); + status = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + drm_bridge_hpd_notify(&dp->bridge, status); } -- 2.35.1.1320.gc452695387.dirty
WARNING: multiple messages have this Message-ID (diff)
From: Sean Anderson <sean.anderson@linux.dev> To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Maxime Ripard <mripard@kernel.org>, Thomas Zimmermann <tzimmermann@suse.de>, dri-devel@lists.freedesktop.org Cc: Daniel Vetter <daniel@ffwll.ch>, linux-arm-kernel@lists.infradead.org, Michal Simek <michal.simek@amd.com>, linux-kernel@vger.kernel.org, David Airlie <airlied@gmail.com>, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>, Sean Anderson <sean.anderson@linux.dev> Subject: [PATCH v4 12/13] drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func Date: Tue, 23 Apr 2024 13:18:58 -0400 [thread overview] Message-ID: <20240423171859.3953024-13-sean.anderson@linux.dev> (raw) In-Reply-To: <20240423171859.3953024-1-sean.anderson@linux.dev> Add a non-locking version of zynqmp_dp_bridge_detect and use it in zynqmp_dp_hpd_work_func so we can take the lock explicitly. This will make it easier to check for hpd_ignore when we add debugfs support. Signed-off-by: Sean Anderson <sean.anderson@linux.dev> --- (no changes since v3) Changes in v3: - New drivers/gpu/drm/xlnx/zynqmp_dp.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index d5ee165046f8..fe002fef4662 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1552,14 +1552,13 @@ static int zynqmp_dp_bridge_atomic_check(struct drm_bridge *bridge, return 0; } -static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +static enum drm_connector_status __zynqmp_dp_bridge_detect(struct zynqmp_dp *dp) { - struct zynqmp_dp *dp = bridge_to_dp(bridge); struct zynqmp_dp_link_config *link_config = &dp->link_config; u32 state, i; int ret; - mutex_lock(&dp->lock); + lockdep_assert_held(&dp->lock); /* * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to @@ -1588,16 +1587,26 @@ static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *brid dp->num_lanes); dp->status = connector_status_connected; - mutex_unlock(&dp->lock); return connector_status_connected; } disconnected: dp->status = connector_status_disconnected; - mutex_unlock(&dp->lock); return connector_status_disconnected; } +static enum drm_connector_status zynqmp_dp_bridge_detect(struct drm_bridge *bridge) +{ + struct zynqmp_dp *dp = bridge_to_dp(bridge); + enum drm_connector_status ret; + + mutex_lock(&dp->lock); + ret = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + + return ret; +} + static const struct drm_edid *zynqmp_dp_bridge_edid_read(struct drm_bridge *bridge, struct drm_connector *connector) { @@ -1651,7 +1660,10 @@ static void zynqmp_dp_hpd_work_func(struct work_struct *work) struct zynqmp_dp *dp = container_of(work, struct zynqmp_dp, hpd_work); enum drm_connector_status status; - status = zynqmp_dp_bridge_detect(&dp->bridge); + mutex_lock(&dp->lock); + status = __zynqmp_dp_bridge_detect(dp); + mutex_unlock(&dp->lock); + drm_bridge_hpd_notify(&dp->bridge, status); } -- 2.35.1.1320.gc452695387.dirty _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-04-23 17:19 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-23 17:18 [PATCH v4 00/13] drm: zynqmp_dp: IRQ cleanups and debugfs support Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 01/13] drm: xlnx: Store base pointers in zynqmp_disp directly Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 02/13] drm: xlnx: Fix kerneldoc Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 03/13] drm: zynqmp_dp: Downgrade log level for aux retries message Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 04/13] drm: zynqmp_dp: Adjust training values per-lane Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 05/13] drm: zynqmp_dp: Rearrange zynqmp_dp for better padding Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 06/13] drm: zynqmp_dp: Don't delay work Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 07/13] drm: zynqmp_dp: Add locking Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 08/13] drm: zynqmp_dp: Don't retrain the link in our IRQ Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 09/13] drm: zynqmp_dp: Convert to a hard IRQ Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` [PATCH v4 10/13] drm: zynqmp_dp: Use AUX IRQs instead of polling Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-24 12:30 ` Tomi Valkeinen 2024-04-24 12:30 ` Tomi Valkeinen 2024-04-23 17:18 ` [PATCH v4 11/13] drm: zynqmp_dp: Split off several helper functions Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-23 17:18 ` Sean Anderson [this message] 2024-04-23 17:18 ` [PATCH v4 12/13] drm: zynqmp_dp: Take dp->lock in zynqmp_dp_hpd_work_func Sean Anderson 2024-04-23 17:18 ` [PATCH v4 13/13] drm: zynqmp_dp: Add debugfs interface for compliance testing Sean Anderson 2024-04-23 17:18 ` Sean Anderson 2024-04-24 18:54 ` [PATCH v4 00/13] drm: zynqmp_dp: IRQ cleanups and debugfs support Tomi Valkeinen 2024-04-24 18:54 ` Tomi Valkeinen 2024-04-25 15:17 ` Sean Anderson 2024-04-25 15:17 ` Sean Anderson 2024-04-27 7:45 ` Tomi Valkeinen 2024-04-27 7:45 ` Tomi Valkeinen
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