[PATCH 2/5] drm/tegra: hub: Add Tegra194 support

[Thierry Reding <thierry.reding@gmail.com>]

From: Thierry Reding <treding@nvidia.com>

The display hub integrated into Tegra194 is almost identical to the one
found on Tegra186. However, it doesn't support DSC (display stream
compression) so it isn't fully compatible.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/tegra/drm.c |  1 +
 drivers/gpu/drm/tegra/hub.c | 19 +++++++++++++++----
 drivers/gpu/drm/tegra/hub.h |  1 +
 3 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index b424bc911b95..b31dcf5c9524 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -1275,6 +1275,7 @@ static const struct of_device_id host1x_drm_subdevs[] = {
 	{ .compatible = "nvidia,tegra186-sor", },
 	{ .compatible = "nvidia,tegra186-sor1", },
 	{ .compatible = "nvidia,tegra186-vic", },
+	{ .compatible = "nvidia,tegra194-display", },
 	{ /* sentinel */ }
 };
 
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index 8f4fcbb515fb..6112d9042979 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -758,10 +758,12 @@ static int tegra_display_hub_probe(struct platform_device *pdev)
 		return err;
 	}
 
-	hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
-	if (IS_ERR(hub->clk_dsc)) {
-		err = PTR_ERR(hub->clk_dsc);
-		return err;
+	if (hub->soc->supports_dsc) {
+		hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
+		if (IS_ERR(hub->clk_dsc)) {
+			err = PTR_ERR(hub->clk_dsc);
+			return err;
+		}
 	}
 
 	hub->clk_hub = devm_clk_get(&pdev->dev, "hub");
@@ -890,10 +892,19 @@ static const struct dev_pm_ops tegra_display_hub_pm_ops = {
 
 static const struct tegra_display_hub_soc tegra186_display_hub = {
 	.num_wgrps = 6,
+	.supports_dsc = true,
+};
+
+static const struct tegra_display_hub_soc tegra194_display_hub = {
+	.num_wgrps = 6,
+	.supports_dsc = false,
 };
 
 static const struct of_device_id tegra_display_hub_of_match[] = {
 	{
+		.compatible = "nvidia,tegra194-display",
+		.data = &tegra194_display_hub
+	}, {
 		.compatible = "nvidia,tegra186-display",
 		.data = &tegra186_display_hub
 	}, {
diff --git a/drivers/gpu/drm/tegra/hub.h b/drivers/gpu/drm/tegra/hub.h
index 85b8bf41a395..6696a85fc1f2 100644
--- a/drivers/gpu/drm/tegra/hub.h
+++ b/drivers/gpu/drm/tegra/hub.h
@@ -38,6 +38,7 @@ to_tegra_shared_plane(struct drm_plane *plane)
 
 struct tegra_display_hub_soc {
 	unsigned int num_wgrps;
+	bool supports_dsc;
 };
 
 struct tegra_display_hub {
-- 
2.19.0

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