89 lines
2.6 KiB
Diff
89 lines
2.6 KiB
Diff
From 8c3c3bf95578257dcb88c78334d9f51d50aa0933 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megi@xff.cz>
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Date: Mon, 22 Aug 2022 13:34:31 +0200
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Subject: [PATCH 376/469] drm: rockchip: Don't require MIPI DSI device when
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it's used for ISP
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On RK3399 one MIPI DSI device can be alternatively used with the ISP1,
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to provide RX DPHY. When this is the case (ISP1 is enabled in device
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tree), probe success of DRM is tied to probe success of ISP1 connected
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camera sensor. This can fail if the user is able to killswitch the camera
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power, like on Pinephone Pro.
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Detect use of MIPI DSI controller by ISP, and don't include it in
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component match list in that case.
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 47 +++++++++++++++++++++
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1 file changed, 47 insertions(+)
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diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
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index 6e0788d14c10..9c2c39143e96 100644
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--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
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+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
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@@ -356,6 +356,43 @@ static void rockchip_drm_match_remove(struct device *dev)
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device_link_del(link);
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}
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+/*
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+ * Check if ISP block linked to a mipi-dsi device via phys phandle is
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+ * enabled in device tree.
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+ */
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+static bool rockchip_drm_is_mipi1_and_used_by_isp(struct device *dev)
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+{
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+ struct device_node *np = NULL, *phy_np;
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+
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+ if (!of_device_is_compatible(dev->of_node, "rockchip,rk3399-mipi-dsi"))
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+ return false;
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+
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+ while (true) {
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+ np = of_find_compatible_node(np, NULL, "rockchip,rk3399-cif-isp");
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+ if (!np)
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+ break;
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+
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+ if (!of_device_is_available(np)) {
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+ of_node_put(np);
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+ continue;
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+ }
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+
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+ phy_np = of_parse_phandle(np, "phys", 0);
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+ if (!phy_np) {
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+ of_node_put(np);
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+ continue;
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+ }
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+
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+ of_node_put(phy_np);
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+ of_node_put(np);
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+
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+ if (phy_np == dev->of_node)
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+ return true;
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+ }
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+
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+ return false;
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+}
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+
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static struct component_match *rockchip_drm_match_add(struct device *dev)
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{
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struct component_match *match = NULL;
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@@ -373,6 +410,16 @@ static struct component_match *rockchip_drm_match_add(struct device *dev)
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if (!d)
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break;
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+ /*
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+ * If mipi1 is connected to ISP, we don't want to wait for mipi1 component,
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+ * because it will not be used by DRM anyway, to not tie success of camera
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+ * driver probe to display pipeline initialization.
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+ */
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+ if (rockchip_drm_is_mipi1_and_used_by_isp(d)) {
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+ dev_info(d, "used by ISP1, skipping from DRM\n");
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+ continue;
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+ }
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+
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device_link_add(dev, d, DL_FLAG_STATELESS);
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component_match_add(dev, &match, component_compare_dev, d);
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} while (true);
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--
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2.34.1
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