linux-kernel - [PATCH 4/4] drm/msm/dp: Add support for SC8180x eDP

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Date:   Mon, 10 May 2021 23:20:43 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Stephen Boyd <swboyd@...omium.org>, sbillaka@...eaurora.org
Cc:     Tanmay Shah <tanmay@...eaurora.org>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] drm/msm/dp: Add support for SC8180x eDP

The eDP controller found in SC8180x is at large compatible with the
current implementation, but has its register blocks at slightly
different offsets.

Add the compatible and the new register layout.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c |  1 +
 drivers/gpu/drm/msm/dp/dp_parser.c  | 28 ++++++++++++++++++++--------
 2 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index d1319b58e901..0be03bdc882c 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -121,6 +121,7 @@ struct dp_display_private {
 
 static const struct of_device_id dp_dt_match[] = {
 	{.compatible = "qcom,sc7180-dp"},
+	{ .compatible = "qcom,sc8180x-edp" },
 	{}
 };
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 51ec85b4803b..47cf18bba4b2 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -251,6 +251,7 @@ static int dp_parser_clock(struct dp_parser *parser)
 static int dp_parser_parse(struct dp_parser *parser)
 {
 	struct dss_io_data *io = &parser->io.dp_controller;
+	struct device *dev = &parser->pdev->dev;
 	int rc = 0;
 
 	if (!parser) {
@@ -276,14 +277,25 @@ static int dp_parser_parse(struct dp_parser *parser)
 	 */
 	parser->regulator_cfg = &sdm845_dp_reg_cfg;
 
-	io->ahb = io->base + 0x0;
-	io->ahb_len = 0x200;
-	io->aux = io->base + 0x200;
-	io->aux_len = 0x200;
-	io->link = io->base + 0x400;
-	io->link_len = 0x600;
-	io->p0 = io->base + 0x1000;
-	io->p0_len = 0x400;
+	if (of_device_is_compatible(dev->of_node, "qcom,sc8180x-edp")) {
+		io->ahb = io->base + 0x0;
+		io->ahb_len = 0x200;
+		io->aux = io->base + 0x200;
+		io->aux_len = 0x200;
+		io->link = io->base + 0x400;
+		io->link_len = 0x600;
+		io->p0 = io->base + 0xa00;
+		io->p0_len = 0x400;
+	} else {
+		io->ahb = io->base + 0x0;
+		io->ahb_len = 0x200;
+		io->aux = io->base + 0x200;
+		io->aux_len = 0x200;
+		io->link = io->base + 0x400;
+		io->link_len = 0x600;
+		io->p0 = io->base + 0x1000;
+		io->p0_len = 0x400;
+	}
 
 	return 0;
 }
-- 
2.29.2