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55 lines
1.8 KiB
Diff
55 lines
1.8 KiB
Diff
From f0f8bab8cb7c50cd1fbcb36854fe138c384f0495 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 23 Feb 2022 15:36:56 +0000
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Subject: [PATCH 035/726] drm/panel: Add prepare_upstream_first flag to
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drm_panel
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Mapping to the drm_bridge flag pre_enable_upstream_first,
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add a new flag prepare_upstream_first to drm_panel to allow
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the panel driver to request that the upstream bridge should
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be pre_enabled before the panel prepare.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/bridge/panel.c | 3 +++
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include/drm/drm_panel.h | 10 ++++++++++
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2 files changed, 13 insertions(+)
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diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
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index 94ecad089cba..0c1dcf85ed13 100644
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--- a/drivers/gpu/drm/bridge/panel.c
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+++ b/drivers/gpu/drm/bridge/panel.c
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@@ -258,6 +258,9 @@ struct drm_bridge *drm_panel_bridge_add_typed(struct drm_panel *panel,
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panel_bridge->bridge.ops = DRM_BRIDGE_OP_MODES;
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panel_bridge->bridge.type = connector_type;
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+ panel_bridge->bridge.pre_enable_upstream_first =
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+ panel->prepare_upstream_first;
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+
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drm_bridge_add(&panel_bridge->bridge);
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return &panel_bridge->bridge;
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diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
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index 8ea3885cd93f..81ea5e5b272e 100644
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--- a/include/drm/drm_panel.h
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+++ b/include/drm/drm_panel.h
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@@ -196,6 +196,16 @@ struct drm_panel {
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* Panel entry in registry.
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*/
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struct list_head list;
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+
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+ /**
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+ * @prepare_upstream_first:
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+ *
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+ * The upstream controller should be prepared first, before the prepare
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+ * for the panel is called. This is largely required for DSI panels
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+ * where the DSI host controller should be initialised to LP-11 before
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+ * the panel is powered up.
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+ */
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+ bool prepare_upstream_first;
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};
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void drm_panel_init(struct drm_panel *panel, struct device *dev,
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--
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2.33.1
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