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From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Stephen Boyd <swboyd@chromium.org>,
        Kuogee Hsieh <quic_khsieh@quicinc.com>,
        Sankeerth Billakanti <quic_sbillaka@quicinc.com>
Cc:     Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        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 2/7] drm/msm/dp: Stop using DP id as index in desc
Date:   Tue,  9 Aug 2022 20:50:08 -0700
Message-Id: <20220810035013.3582848-3-bjorn.andersson@linaro.org>
In-Reply-To: <20220810035013.3582848-1-bjorn.andersson@linaro.org>
References: <20220810035013.3582848-1-bjorn.andersson@linaro.org>
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In the SC8280XP platform there are two identical MDSS instances, each
with the same set of DisplayPort instances, at different addresses.

By not relying on the index to define the instance id it's possible to
describe them both in the same table and hence have a single compatible.

While at it, flatten the cfg/desc structure so that the match data is
just an array of descs.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 72 ++++++++++-------------------
 1 file changed, 25 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index bfd0aeff3f0d..2d9bbc335786 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -122,61 +122,41 @@ struct dp_display_private {
 
 struct msm_dp_desc {
 	phys_addr_t io_start;
+	unsigned int id;
 	unsigned int connector_type;
 	bool wide_bus_en;
 };
 
-struct msm_dp_config {
-	const struct msm_dp_desc *descs;
-	size_t num_descs;
-};
-
 static const struct msm_dp_desc sc7180_dp_descs[] = {
-	[MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
-};
-
-static const struct msm_dp_config sc7180_dp_cfg = {
-	.descs = sc7180_dp_descs,
-	.num_descs = ARRAY_SIZE(sc7180_dp_descs),
+	{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+	{}
 };
 
 static const struct msm_dp_desc sc7280_dp_descs[] = {
-	[MSM_DP_CONTROLLER_0] =	{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
-	[MSM_DP_CONTROLLER_1] =	{ .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
-};
-
-static const struct msm_dp_config sc7280_dp_cfg = {
-	.descs = sc7280_dp_descs,
-	.num_descs = ARRAY_SIZE(sc7280_dp_descs),
+	{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
+	{ .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
+	{}
 };
 
 static const struct msm_dp_desc sc8180x_dp_descs[] = {
-	[MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
-	[MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
-	[MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP },
-};
-
-static const struct msm_dp_config sc8180x_dp_cfg = {
-	.descs = sc8180x_dp_descs,
-	.num_descs = ARRAY_SIZE(sc8180x_dp_descs),
+	{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+	{ .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+	{ .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP },
+	{}
 };
 
 static const struct msm_dp_desc sm8350_dp_descs[] = {
-	[MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
-};
-
-static const struct msm_dp_config sm8350_dp_cfg = {
-	.descs = sm8350_dp_descs,
-	.num_descs = ARRAY_SIZE(sm8350_dp_descs),
+	{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+	{}
 };
 
 static const struct of_device_id dp_dt_match[] = {
-	{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
-	{ .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_cfg },
-	{ .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_cfg },
-	{ .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_cfg },
-	{ .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_cfg },
-	{ .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_cfg },
+	{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
+	{ .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
+	{ .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
+	{ .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_descs },
+	{ .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_descs },
+	{ .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_descs },
 	{}
 };
 
@@ -1262,10 +1242,9 @@ int dp_display_request_irq(struct msm_dp *dp_display)
 	return 0;
 }
 
-static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev,
-						     unsigned int *id)
+static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
 {
-	const struct msm_dp_config *cfg = of_device_get_match_data(&pdev->dev);
+	const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
 	struct resource *res;
 	int i;
 
@@ -1273,11 +1252,9 @@ static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pde
 	if (!res)
 		return NULL;
 
-	for (i = 0; i < cfg->num_descs; i++) {
-		if (cfg->descs[i].io_start == res->start) {
-			*id = i;
-			return &cfg->descs[i];
-		}
+	for (i = 0; i < descs[i].io_start; i++) {
+		if (descs[i].io_start == res->start)
+			return &descs[i];
 	}
 
 	dev_err(&pdev->dev, "unknown displayport instance\n");
@@ -1299,12 +1276,13 @@ static int dp_display_probe(struct platform_device *pdev)
 	if (!dp)
 		return -ENOMEM;
 
-	desc = dp_display_get_desc(pdev, &dp->id);
+	desc = dp_display_get_desc(pdev);
 	if (!desc)
 		return -EINVAL;
 
 	dp->pdev = pdev;
 	dp->name = "drm_dp";
+	dp->id = desc->id;
 	dp->dp_display.connector_type = desc->connector_type;
 	dp->wide_bus_en = desc->wide_bus_en;
 	dp->dp_display.is_edp =
-- 
2.35.1