[PATCH v2 7/7] drm/msm/dp: HPD handling relates to next_bridge

From: Bjorn Andersson <quic_bjorande@quicinc.com>
To: Rob Clark <robdclark@gmail.com>,
	Abhinav Kumar <quic_abhinavk@quicinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Stephen Boyd <swboyd@chromium.org>,
	Kuogee Hsieh <quic_khsieh@quicinc.com>,
	Sankeerth Billakanti <quic_sbillaka@quicinc.com>,
	<linux-arm-msm@vger.kernel.org>,
	<dri-devel@lists.freedesktop.org>,
	<freedreno@lists.freedesktop.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH v2 7/7] drm/msm/dp: HPD handling relates to next_bridge
Date: Fri, 16 Sep 2022 13:00:28 -0700	[thread overview]
Message-ID: <20220916200028.25009-8-quic_bjorande@quicinc.com> (raw)
In-Reply-To: <20220916200028.25009-1-quic_bjorande@quicinc.com>

From: Bjorn Andersson <bjorn.andersson@linaro.org>

The DisplayPort controller's internal HPD interrupt handling is used for
cases where the HPD signal is connected to a GPIO which is pinmuxed into
the DisplayPort controller.

Most of the logic for enabling and disabling the HPD-related interrupts
is conditioned on the presence of an EDP panel, but more generically
designs that has a downstream drm_bridge (next_bridge) could use this to
handle the HPD interrupts, instead of the internal mechanism.

So replace the current is_edp-based guards with a check for the presence
of next_bridge.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 3d365950de0f..224ae3aa07c4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -610,7 +610,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 	}
 
 	/* enable HDP irq_hpd/replug interrupt */
-	if (!dp->dp_display.is_edp)
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog,
 					   DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK,
 					   true);
@@ -653,7 +653,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 			dp->dp_display.connector_type, state);
 
 	/* disable irq_hpd/replug interrupts */
-	if (!dp->dp_display.is_edp)
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog,
 					   DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK,
 					   false);
@@ -682,7 +682,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 	}
 
 	/* disable HPD plug interrupts */
-	if (!dp->dp_display.is_edp)
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false);
 
 	/*
@@ -701,7 +701,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 	dp_display_handle_plugged_change(&dp->dp_display, false);
 
 	/* enable HDP plug interrupt to prepare for next plugin */
-	if (!dp->dp_display.is_edp)
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true);
 
 	drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
@@ -1086,8 +1086,8 @@ static void dp_display_config_hpd(struct dp_display_private *dp)
 	dp_display_host_init(dp);
 	dp_catalog_ctrl_hpd_config(dp->catalog);
 
-	/* Enable plug and unplug interrupts only for external DisplayPort */
-	if (!dp->dp_display.is_edp)
+	/* Enable plug and unplug interrupts only if not handled by next_bridge */
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog,
 				DP_DP_HPD_PLUG_INT_MASK |
 				DP_DP_HPD_UNPLUG_INT_MASK,
@@ -1379,8 +1379,7 @@ static int dp_pm_resume(struct device *dev)
 
 	dp_catalog_ctrl_hpd_config(dp->catalog);
 
-
-	if (!dp->dp_display.is_edp)
+	if (!dp->dp_display.next_bridge)
 		dp_catalog_hpd_config_intr(dp->catalog,
 				DP_DP_HPD_PLUG_INT_MASK |
 				DP_DP_HPD_UNPLUG_INT_MASK,
-- 
2.17.1

