Remove HDMI fix applied in Linux 5.15.68 (#2166)

buildroot-external/board/hardkernel/patches/linux/0008-drm-bridge-display-connector-implement-bus-fmts-call.patch

@@ -1,140 +0,0 @@
-From 77ec76aa649244b94381334ccf5ce641ef2f8717 Mon Sep 17 00:00:00 2001
-Message-Id: <77ec76aa649244b94381334ccf5ce641ef2f8717.1663008544.git.stefan@agner.ch>
-In-Reply-To: <ff269d57d23c2edee262e14c6cf4116bc16d8019.1663008544.git.stefan@agner.ch>
-References: <ff269d57d23c2edee262e14c6cf4116bc16d8019.1663008544.git.stefan@agner.ch>
-From: Neil Armstrong <narmstrong@baylibre.com>
-Date: Wed, 20 Oct 2021 14:39:42 +0200
-Subject: [PATCH] drm/bridge: display-connector: implement bus fmts callbacks
-
-Since this bridge is tied to the connector, it acts like a passthrough,
-so concerning the output & input bus formats, either pass the bus formats from the
-previous bridge or return fallback data like done in the bridge function:
-drm_atomic_bridge_chain_select_bus_fmts() & select_bus_fmt_recursive.
-
-This permits avoiding skipping the negociation if the remaining bridge chain has
-all the bits in place.
-
-Without this bus fmt negociation breaks on drm/meson HDMI pipeline when attaching
-dw-hdmi with DRM_BRIDGE_ATTACH_NO_CONNECTOR, because the last bridge of the
-display-connector doesn't implement buf fmt callbacks and MEDIA_BUS_FMT_FIXED
-is used leading to select an unsupported default bus format from dw-hdmi.
-
-Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
-Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
-Link: https://patchwork.freedesktop.org/patch/msgid/20211020123947.2585572-2-narmstrong@baylibre.com
-(cherry picked from commit 7cd70656d1285b79c001f041a017fcfee4292ff9)
----
- drivers/gpu/drm/bridge/display-connector.c | 86 ++++++++++++++++++++++
- 1 file changed, 86 insertions(+)
-
-diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c
-index 847a0dce7f1d..d24f5b90feab 100644
---- a/drivers/gpu/drm/bridge/display-connector.c
-+++ b/drivers/gpu/drm/bridge/display-connector.c
-@@ -13,6 +13,7 @@
- #include <linux/platform_device.h>
- #include <linux/regulator/consumer.h>
- 
-+#include <drm/drm_atomic_helper.h>
- #include <drm/drm_bridge.h>
- #include <drm/drm_edid.h>
- 
-@@ -87,10 +88,95 @@ static struct edid *display_connector_get_edid(struct drm_bridge *bridge,
- 	return drm_get_edid(connector, conn->bridge.ddc);
- }
- 
-+/*
-+ * Since this bridge is tied to the connector, it acts like a passthrough,
-+ * so concerning the output bus formats, either pass the bus formats from the
-+ * previous bridge or return fallback data like done in the bridge function:
-+ * drm_atomic_bridge_chain_select_bus_fmts().
-+ * This supports negotiation if the bridge chain has all bits in place.
-+ */
-+static u32 *display_connector_get_output_bus_fmts(struct drm_bridge *bridge,
-+					struct drm_bridge_state *bridge_state,
-+					struct drm_crtc_state *crtc_state,
-+					struct drm_connector_state *conn_state,
-+					unsigned int *num_output_fmts)
-+{
-+	struct drm_bridge *prev_bridge = drm_bridge_get_prev_bridge(bridge);
-+	struct drm_bridge_state *prev_bridge_state;
-+
-+	if (!prev_bridge || !prev_bridge->funcs->atomic_get_output_bus_fmts) {
-+		struct drm_connector *conn = conn_state->connector;
-+		u32 *out_bus_fmts;
-+
-+		*num_output_fmts = 1;
-+		out_bus_fmts = kmalloc(sizeof(*out_bus_fmts), GFP_KERNEL);
-+		if (!out_bus_fmts)
-+			return NULL;
-+
-+		if (conn->display_info.num_bus_formats &&
-+		    conn->display_info.bus_formats)
-+			out_bus_fmts[0] = conn->display_info.bus_formats[0];
-+		else
-+			out_bus_fmts[0] = MEDIA_BUS_FMT_FIXED;
-+
-+		return out_bus_fmts;
-+	}
-+
-+	prev_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
-+							    prev_bridge);
-+
-+	return prev_bridge->funcs->atomic_get_output_bus_fmts(prev_bridge, prev_bridge_state,
-+							      crtc_state, conn_state,
-+							      num_output_fmts);
-+}
-+
-+/*
-+ * Since this bridge is tied to the connector, it acts like a passthrough,
-+ * so concerning the input bus formats, either pass the bus formats from the
-+ * previous bridge or MEDIA_BUS_FMT_FIXED (like select_bus_fmt_recursive())
-+ * when atomic_get_input_bus_fmts is not supported.
-+ * This supports negotiation if the bridge chain has all bits in place.
-+ */
-+static u32 *display_connector_get_input_bus_fmts(struct drm_bridge *bridge,
-+					struct drm_bridge_state *bridge_state,
-+					struct drm_crtc_state *crtc_state,
-+					struct drm_connector_state *conn_state,
-+					u32 output_fmt,
-+					unsigned int *num_input_fmts)
-+{
-+	struct drm_bridge *prev_bridge = drm_bridge_get_prev_bridge(bridge);
-+	struct drm_bridge_state *prev_bridge_state;
-+
-+	if (!prev_bridge || !prev_bridge->funcs->atomic_get_input_bus_fmts) {
-+		u32 *in_bus_fmts;
-+
-+		*num_input_fmts = 1;
-+		in_bus_fmts = kmalloc(sizeof(*in_bus_fmts), GFP_KERNEL);
-+		if (!in_bus_fmts)
-+			return NULL;
-+
-+		in_bus_fmts[0] = MEDIA_BUS_FMT_FIXED;
-+
-+		return in_bus_fmts;
-+	}
-+
-+	prev_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
-+							    prev_bridge);
-+
-+	return prev_bridge->funcs->atomic_get_input_bus_fmts(prev_bridge, prev_bridge_state,
-+							     crtc_state, conn_state, output_fmt,
-+							     num_input_fmts);
-+}
-+
- static const struct drm_bridge_funcs display_connector_bridge_funcs = {
- 	.attach = display_connector_attach,
- 	.detect = display_connector_detect,
- 	.get_edid = display_connector_get_edid,
-+	.atomic_get_output_bus_fmts = display_connector_get_output_bus_fmts,
-+	.atomic_get_input_bus_fmts = display_connector_get_input_bus_fmts,
-+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
-+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
-+	.atomic_reset = drm_atomic_helper_bridge_reset,
- };
- 
- static irqreturn_t display_connector_hpd_irq(int irq, void *arg)
--- 
-2.37.3
-