linux-kernel - [PATCH 11/45] drm/msm/dp: split dp_ctrl

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Message-ID: <20241205-dp_mst-v1-11-f8618d42a99a@quicinc.com>
Date: Thu, 5 Dec 2024 20:31:42 -0800
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Rob Clark <robdclark@...il.com>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Simona
 Vetter" <simona@...ll.ch>,
        Stephen Boyd <swboyd@...omium.org>,
        "Chandan
 Uddaraju" <chandanu@...eaurora.org>,
        Guenter Roeck <groeck@...omium.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>
CC: Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>,
        Tanmay Shah <tanmay@...eaurora.org>, <linux-arm-msm@...r.kernel.org>,
        <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Jessica Zhang
	<quic_jesszhan@...cinc.com>,
        Laurent Pinchart
	<laurent.pinchart@...asonboard.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>
Subject: [PATCH 11/45] drm/msm/dp: split dp_ctrl_off() into stream and link
 parts

Split dp_ctrl_off() into stream and link parts so that for MST
cases we can control the link and pixel parts separately.

Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 29 +++--------------------------
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  2 +-
 drivers/gpu/drm/msm/dp/dp_display.c |  4 +++-
 3 files changed, 7 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 118f5ed83e464f9f27f813eb39624f9c3189f5ac..485339eb998cc6c8c1e8ab0a88b5c5d6ef300a1f 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1739,7 +1739,8 @@ static int msm_dp_ctrl_process_phy_test_request(struct msm_dp_ctrl_private *ctrl
 	 * running. Add the global reset just before disabling the
 	 * link clocks and core clocks.
 	 */
-	msm_dp_ctrl_off(&ctrl->msm_dp_ctrl);
+	msm_dp_ctrl_stream_clk_off(&ctrl->msm_dp_ctrl);
+	msm_dp_ctrl_off_link(&ctrl->msm_dp_ctrl);
 
 	ret = msm_dp_ctrl_on_link(&ctrl->msm_dp_ctrl);
 	if (ret) {
@@ -2042,7 +2043,7 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, struct msm_dp_panel *
 	return ret;
 }
 
-static void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl)
+void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl)
 {
 	struct msm_dp_ctrl_private *ctrl;
 
@@ -2110,30 +2111,6 @@ void msm_dp_ctrl_off_link(struct msm_dp_ctrl *msm_dp_ctrl)
 		phy, phy->init_count, phy->power_count);
 }
 
-void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl)
-{
-	struct msm_dp_ctrl_private *ctrl;
-	struct phy *phy;
-
-	ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl);
-	phy = ctrl->phy;
-
-	msm_dp_catalog_panel_disable_vsc_sdp(ctrl->catalog);
-
-	msm_dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
-
-	msm_dp_catalog_ctrl_reset(ctrl->catalog);
-
-	msm_dp_ctrl_stream_clk_off(msm_dp_ctrl);
-
-	dev_pm_opp_set_rate(ctrl->dev, 0);
-	msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl);
-
-	phy_power_off(phy);
-	drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n",
-			phy, phy->init_count, phy->power_count);
-}
-
 irqreturn_t msm_dp_ctrl_isr(struct msm_dp_ctrl *msm_dp_ctrl)
 {
 	struct msm_dp_ctrl_private *ctrl;
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index 547155ffa50fbe2f3a1f2c2e1ee17420daf0f3da..887cf5a866f07cb9038887a0634d3e1a0375879c 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -22,7 +22,7 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, struct msm_dp_panel *
 int msm_dp_ctrl_prepare_stream_on(struct msm_dp_ctrl *dp_ctrl, bool force_link_train);
 void msm_dp_ctrl_off_link_stream(struct msm_dp_ctrl *msm_dp_ctrl);
 void msm_dp_ctrl_off_link(struct msm_dp_ctrl *msm_dp_ctrl);
-void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl);
+void msm_dp_ctrl_stream_clk_off(struct msm_dp_ctrl *msm_dp_ctrl);
 void msm_dp_ctrl_push_idle(struct msm_dp_ctrl *msm_dp_ctrl);
 irqreturn_t msm_dp_ctrl_isr(struct msm_dp_ctrl *msm_dp_ctrl);
 void msm_dp_ctrl_handle_sink_request(struct msm_dp_ctrl *msm_dp_ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index c059f749c1f204deac9dfb0c56f537f5545d9acb..b0458bbc89e934ca33ed5af3f2a8ebca30b50824 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -911,7 +911,9 @@ static int msm_dp_display_disable(struct msm_dp_display_private *dp)
 	if (dp->link->sink_count == 0)
 		msm_dp_ctrl_psm_config(dp->ctrl);
 
-	msm_dp_ctrl_off(dp->ctrl);
+	msm_dp_ctrl_stream_clk_off(dp->ctrl);
+
+	msm_dp_ctrl_off_link(dp->ctrl);
 
 	/* re-init the PHY so that we can listen to Dongle disconnect */
 	if (dp->link->sink_count == 0)

-- 
2.34.1