bcm27xx: add kernel 5.10 support

Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 4B v1.1 4G
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 83 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.10/950-0598-drm-vc4-crtc-Fix-vc4_get_crtc_encoder-logic.patch b/target/linux/bcm27xx/patches-5.10/950-0598-drm-vc4-crtc-Fix-vc4_get_crtc_encoder-logic.patch
new file mode 100644
index 0000000000..0b73698805
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0598-drm-vc4-crtc-Fix-vc4_get_crtc_encoder-logic.patch
@@ -0,0 +1,83 @@
+From bc75a1ca95c195508c7d9238a9dc31218ead3ad1 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Thu, 6 May 2021 17:07:07 +0200
+Subject: [PATCH] drm/vc4: crtc: Fix vc4_get_crtc_encoder logic
+
+The vc4_get_crtc_encoder function currently only works when the
+connector->state->crtc pointer is set, which is only true when the
+connector is currently enabled.
+
+However, we use it as part of the disable path as well, and our lookup
+will fail in that case, resulting in it returning a null pointer we
+can't act on.
+
+We can access the connector that used to be connected to that crtc
+though using the old connector state in the disable path.
+
+Since we want to support both the enable and disable path, we can
+support it by passing the state accessor variant as a function pointer,
+together with the atomic state.
+
+Fixes: 792c3132bc1b ("drm/vc4: encoder: Add finer-grained encoder callbacks")
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/gpu/drm/vc4/vc4_crtc.c | 21 ++++++++++++++++-----
+ 1 file changed, 16 insertions(+), 5 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_crtc.c
++++ b/drivers/gpu/drm/vc4/vc4_crtc.c
+@@ -279,14 +279,22 @@ static u32 vc4_crtc_get_fifo_full_level_
+  * allows drivers to push pixels to more than one encoder from the
+  * same CRTC.
+  */
+-static struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc)
++static struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc,
++						struct drm_atomic_state *state,
++						struct drm_connector_state *(*get_state)(struct drm_atomic_state *state,
++											 struct drm_connector *connector))
+ {
+ 	struct drm_connector *connector;
+ 	struct drm_connector_list_iter conn_iter;
+ 
+ 	drm_connector_list_iter_begin(crtc->dev, &conn_iter);
+ 	drm_for_each_connector_iter(connector, &conn_iter) {
+-		if (connector->state->crtc == crtc) {
++		struct drm_connector_state *conn_state = get_state(state, connector);
++
++		if (!conn_state)
++			continue;
++
++		if (conn_state->crtc == crtc) {
+ 			drm_connector_list_iter_end(&conn_iter);
+ 			return connector->encoder;
+ 		}
+@@ -309,7 +317,8 @@ static void vc4_crtc_config_pv(struct dr
+ {
+ 	struct drm_device *dev = crtc->dev;
+ 	struct vc4_dev *vc4 = to_vc4_dev(dev);
+-	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc);
++	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, state,
++							   drm_atomic_get_new_connector_state);
+ 	struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
+ 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ 	const struct vc4_pv_data *pv_data = vc4_crtc_to_vc4_pv_data(vc4_crtc);
+@@ -425,7 +434,8 @@ static int vc4_crtc_disable(struct drm_c
+ 			    struct drm_atomic_state *state,
+ 			    unsigned int channel)
+ {
+-	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc);
++	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, state,
++							   drm_atomic_get_old_connector_state);
+ 	struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
+ 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ 	struct drm_device *dev = crtc->dev;
+@@ -525,7 +535,8 @@ static void vc4_crtc_atomic_enable(struc
+ {
+ 	struct drm_device *dev = crtc->dev;
+ 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+-	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc);
++	struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, state,
++							   drm_atomic_get_new_connector_state);
+ 	struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
+ 
+ 	require_hvs_enabled(dev);