brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 157 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0661-drm-vc4-Use-drm_atomic_helper_check_plane_state-to-s.patch b/target/linux/bcm27xx/patches-4.19/950-0661-drm-vc4-Use-drm_atomic_helper_check_plane_state-to-s.patch
new file mode 100644
index 0000000000..3ead02cbbf
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0661-drm-vc4-Use-drm_atomic_helper_check_plane_state-to-s.patch
@@ -0,0 +1,157 @@
+From 2a98dc34696c6510a49a684eb56d3a9c2a150571 Mon Sep 17 00:00:00 2001
+From: Boris Brezillon <boris.brezillon@bootlin.com>
+Date: Fri, 3 Aug 2018 11:22:29 +0200
+Subject: [PATCH] drm/vc4: Use drm_atomic_helper_check_plane_state() to
+ simplify the logic
+
+drm_atomic_helper_check_plane_state() takes care of checking the
+scaling capabilities and calculating the clipped X/Y offsets for us.
+
+Rely on this function instead of open-coding the logic.
+
+Incidentally, it seems to fix a problem we had with negative X/Y
+positioning of YUV planes.
+
+Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+Link: https://patchwork.freedesktop.org/patch/msgid/20180803092231.26446-3-boris.brezillon@bootlin.com
+---
+ drivers/gpu/drm/vc4/vc4_plane.c | 103 ++++++++++++++++----------------
+ 1 file changed, 52 insertions(+), 51 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_plane.c
++++ b/drivers/gpu/drm/vc4/vc4_plane.c
+@@ -313,31 +313,59 @@ static int vc4_plane_setup_clipping_and_
+ 	u32 subpixel_src_mask = (1 << 16) - 1;
+ 	u32 format = fb->format->format;
+ 	int num_planes = fb->format->num_planes;
+-	u32 h_subsample = 1;
+-	u32 v_subsample = 1;
+-	int ret;
+-	int i;
++	int min_scale = 1, max_scale = INT_MAX;
++	struct drm_crtc_state *crtc_state;
++	u32 h_subsample, v_subsample;
++	int i, ret;
++
++	crtc_state = drm_atomic_get_existing_crtc_state(state->state,
++							state->crtc);
++	if (!crtc_state) {
++		DRM_DEBUG_KMS("Invalid crtc state\n");
++		return -EINVAL;
++	}
++
++	/* No configuring scaling on the cursor plane, since it gets
++	 * non-vblank-synced updates, and scaling requires LBM changes which
++	 * have to be vblank-synced.
++	 */
++	if (plane->type == DRM_PLANE_TYPE_CURSOR) {
++		min_scale = DRM_PLANE_HELPER_NO_SCALING;
++		max_scale = DRM_PLANE_HELPER_NO_SCALING;
++	} else {
++		min_scale = 1;
++		max_scale = INT_MAX;
++	}
++
++	ret = drm_atomic_helper_check_plane_state(state, crtc_state,
++						  min_scale, max_scale,
++						  true, true);
++	if (ret)
++		return ret;
++
++	h_subsample = drm_format_horz_chroma_subsampling(format);
++	v_subsample = drm_format_vert_chroma_subsampling(format);
+ 
+ 	for (i = 0; i < num_planes; i++)
+ 		vc4_state->offsets[i] = bo->paddr + fb->offsets[i];
+ 
+ 	/* We don't support subpixel source positioning for scaling. */
+-	if ((state->src_x & subpixel_src_mask) ||
+-	    (state->src_y & subpixel_src_mask) ||
+-	    (state->src_w & subpixel_src_mask) ||
+-	    (state->src_h & subpixel_src_mask)) {
++	if ((state->src.x1 & subpixel_src_mask) ||
++	    (state->src.x2 & subpixel_src_mask) ||
++	    (state->src.y1 & subpixel_src_mask) ||
++	    (state->src.y2 & subpixel_src_mask)) {
+ 		return -EINVAL;
+ 	}
+ 
+-	vc4_state->src_x = state->src_x >> 16;
+-	vc4_state->src_y = state->src_y >> 16;
+-	vc4_state->src_w[0] = state->src_w >> 16;
+-	vc4_state->src_h[0] = state->src_h >> 16;
+-
+-	vc4_state->crtc_x = state->crtc_x;
+-	vc4_state->crtc_y = state->crtc_y;
+-	vc4_state->crtc_w = state->crtc_w;
+-	vc4_state->crtc_h = state->crtc_h;
++	vc4_state->src_x = state->src.x1 >> 16;
++	vc4_state->src_y = state->src.y1 >> 16;
++	vc4_state->src_w[0] = (state->src.x2 - state->src.x1) >> 16;
++	vc4_state->src_h[0] = (state->src.y2 - state->src.y1) >> 16;
++
++	vc4_state->crtc_x = state->dst.x1;
++	vc4_state->crtc_y = state->dst.y1;
++	vc4_state->crtc_w = state->dst.x2 - state->dst.x1;
++	vc4_state->crtc_h = state->dst.y2 - state->dst.y1;
+ 
+ 	ret = vc4_plane_margins_adj(state);
+ 	if (ret)
+@@ -354,8 +382,6 @@ static int vc4_plane_setup_clipping_and_
+ 	if (num_planes > 1) {
+ 		vc4_state->is_yuv = true;
+ 
+-		h_subsample = drm_format_horz_chroma_subsampling(format);
+-		v_subsample = drm_format_vert_chroma_subsampling(format);
+ 		vc4_state->src_w[1] = vc4_state->src_w[0] / h_subsample;
+ 		vc4_state->src_h[1] = vc4_state->src_h[0] / v_subsample;
+ 
+@@ -380,39 +406,14 @@ static int vc4_plane_setup_clipping_and_
+ 		vc4_state->y_scaling[1] = VC4_SCALING_NONE;
+ 	}
+ 
+-	/* No configuring scaling on the cursor plane, since it gets
+-	   non-vblank-synced updates, and scaling requires requires
+-	   LBM changes which have to be vblank-synced.
+-	 */
+-	if (plane->type == DRM_PLANE_TYPE_CURSOR && !vc4_state->is_unity)
+-		return -EINVAL;
+-
+-	/* Clamp the on-screen start x/y to 0.  The hardware doesn't
+-	 * support negative y, and negative x wastes bandwidth.
+-	 */
+-	if (vc4_state->crtc_x < 0) {
+-		for (i = 0; i < num_planes; i++) {
+-			u32 cpp = fb->format->cpp[i];
+-			u32 subs = ((i == 0) ? 1 : h_subsample);
+-
+-			vc4_state->offsets[i] += (cpp *
+-						  (-vc4_state->crtc_x) / subs);
+-		}
+-		vc4_state->src_w[0] += vc4_state->crtc_x;
+-		vc4_state->src_w[1] += vc4_state->crtc_x / h_subsample;
+-		vc4_state->crtc_x = 0;
+-	}
+-
+-	if (vc4_state->crtc_y < 0) {
+-		for (i = 0; i < num_planes; i++) {
+-			u32 subs = ((i == 0) ? 1 : v_subsample);
+-
+-			vc4_state->offsets[i] += (fb->pitches[i] *
+-						  (-vc4_state->crtc_y) / subs);
+-		}
+-		vc4_state->src_h[0] += vc4_state->crtc_y;
+-		vc4_state->src_h[1] += vc4_state->crtc_y / v_subsample;
+-		vc4_state->crtc_y = 0;
++	/* Adjust the base pointer to the first pixel to be scanned out. */
++	for (i = 0; i < num_planes; i++) {
++		vc4_state->offsets[i] += (vc4_state->src_y /
++					  (i ? v_subsample : 1)) *
++					 fb->pitches[i];
++		vc4_state->offsets[i] += (vc4_state->src_x /
++					  (i ? h_subsample : 1)) *
++					 fb->format->cpp[i];
+ 	}
+ 
+ 	return 0;