bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

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

1 files changed, 54 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0915-drm-vc4-Add-DRM_MODE_FLAG_DBLCLK-support-to-vc4-fkms.patch b/target/linux/bcm27xx/patches-5.4/950-0915-drm-vc4-Add-DRM_MODE_FLAG_DBLCLK-support-to-vc4-fkms.patch
new file mode 100644
index 0000000000..a7a1d91290
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0915-drm-vc4-Add-DRM_MODE_FLAG_DBLCLK-support-to-vc4-fkms.patch
@@ -0,0 +1,54 @@
+From 16349a9b271d331a496a482f46f41a3e1db56891 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Thu, 16 Jul 2020 12:02:47 +0100
+Subject: [PATCH] drm/vc4: Add DRM_MODE_FLAG_DBLCLK support to
+ vc4-fkms
+
+480i and several other modes use DRM_MODE_FLAG_DBLCLK and pixel
+replication.
+
+Add in flags for that so that FKMS can select CEA modes 6 & 7.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -158,6 +158,8 @@ struct set_timings {
+ #define TIMINGS_FLAGS_RGB_LIMITED	BIT(8)
+ /* DVI monitor, therefore disable infoframes. Not set corresponds to HDMI. */
+ #define TIMINGS_FLAGS_DVI		BIT(9)
++/* Double clock */
++#define TIMINGS_FLAGS_DBL_CLK		BIT(10)
+ };
+ 
+ struct mailbox_set_mode {
+@@ -946,6 +948,8 @@ static void vc4_crtc_mode_set_nofb(struc
+ 
+ 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ 		mb.timings.flags |= TIMINGS_FLAGS_INTERLACE;
++	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
++		mb.timings.flags |= TIMINGS_FLAGS_DBL_CLK;
+ 
+ 	mb.timings.video_id_code = frame.avi.video_code;
+ 
+@@ -1104,11 +1108,16 @@ vc4_crtc_mode_valid(struct drm_crtc *crt
+ 	 */
+ 	if (fkms->bcm2711 &&
+ 	    (vc4_crtc->display_number == 2 || vc4_crtc->display_number == 7) &&
++	    !(mode->flags & DRM_MODE_FLAG_DBLCLK) &&
+ 	    ((mode->hdisplay |				/* active */
+ 	      (mode->hsync_start - mode->hdisplay) |	/* front porch */
+ 	      (mode->hsync_end - mode->hsync_start) |	/* sync pulse */
+-	      (mode->htotal - mode->hsync_end)) & 1))	/* back porch */
++	      (mode->htotal - mode->hsync_end)) & 1))	/* back porch */ {
++		DRM_DEBUG_KMS("[CRTC:%d] Odd timing rejected %u %u %u %u.\n",
++			      crtc->base.id, mode->hdisplay, mode->hsync_start,
++			      mode->hsync_end, mode->htotal);
+ 		return MODE_H_ILLEGAL;
++	}
+ 
+ 	return MODE_OK;
+ }