linux-kernel - [PATCH 3/4] drm/msm/dp: Populate the max

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Message-ID: <20250212-mst_qcs8300-v1-3-38a8aa08394b@quicinc.com>
Date: Wed, 12 Feb 2025 15:12:26 +0800
From: Yongxing Mou <quic_yongmou@...cinc.com>
To: Rob Clark <robdclark@...il.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.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>,
        "Maarten
 Lankhorst" <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard
	<mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Kuogee Hsieh <quic_khsieh@...cinc.com>,
        "Bjorn
 Andersson" <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Yongxing Mou <quic_yongmou@...cinc.com>
Subject: [PATCH 3/4] drm/msm/dp: Populate the max_streams for qcs8300 mst
 controller

Add support to program 2 streams MST for qcs8300. Previously, the
qcs8300 reused the driver of the sm8650's DP controller because they
have the same base address, offset, and number of controllers. However,
now we need to enable the MST feature for the qcs8300, so we need a new
patch The qcs8300 use the same DPU hardware as sa8775p but only have one
DPU and dp controller which supports 4 streams MST, but currently we only
enable 2 streams MST. It use the intf0 and intf3 to output the data
streams of MST0 and MST1.

Signed-off-by: Yongxing Mou <quic_yongmou@...cinc.com>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index fbbd39d1e53ba3172757105937a528b5c58ea290..fbe4658af1be2ec8c02e8f567667f1dc93ee5537 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -149,6 +149,13 @@ static const unsigned int stream_intf_map_sa_8775p[][DP_STREAM_MAX] = {
 	{}
 };
 
+static const struct msm_dp_desc msm_dp_desc_qcs8300[] = {
+	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true, .max_streams = 2,
+	  .intf_map = stream_intf_map_sa_8775p[MSM_DP_CONTROLLER_0],
+	},
+	{}
+};
+
 static const struct msm_dp_desc msm_dp_desc_sa8775p[] = {
 	{ .io_start = 0x0af54000, .id = MSM_DP_CONTROLLER_0, .wide_bus_supported = true, .max_streams = 2,
 	  .intf_map = stream_intf_map_sa_8775p[MSM_DP_CONTROLLER_0],
@@ -205,6 +212,7 @@ static const struct msm_dp_desc msm_dp_desc_x1e80100[] = {
 };
 
 static const struct of_device_id msm_dp_dt_match[] = {
+	{ .compatible = "qcom,qcs8300-dp", .data = &msm_dp_desc_qcs8300 },
 	{ .compatible = "qcom,sa8775p-dp", .data = &msm_dp_desc_sa8775p },
 	{ .compatible = "qcom,sc7180-dp", .data = &msm_dp_desc_sc7180 },
 	{ .compatible = "qcom,sc7280-dp", .data = &msm_dp_desc_sc7280 },

-- 
2.34.1