brcm2708: organize kernel patches

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0574-drm-vc4-Max-resolution-of-7680-is-conditional-on-bei.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0574-drm-vc4-Max-resolution-of-7680-is-conditional-on-bei.patch b/target/linux/brcm2708/patches-4.19/950-0574-drm-vc4-Max-resolution-of-7680-is-conditional-on-bei.patch
new file mode 100644 (file)
index 0000000..83e1845
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0574-drm-vc4-Max-resolution-of-7680-is-conditional-on-bei.patch
@@ -0,0 +1,38 @@
+From bce8c3dc146e3287519d5f6bb965dc2458e6684d Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Thu, 30 May 2019 15:55:15 +0100
+Subject: [PATCH] drm/vc4: Max resolution of 7680 is conditional on
+ being Pi4
+
+The max resolution had been increased from 2048 to 7680 for all
+platforms. This code is common with Pi0-3 which have a max render
+target for GL of 2048, therefore the increased resolution has to
+be conditional on the platform.
+Switch based on whether the bcm2835-v3d node is found, as that is
+not present on Pi4. (There is a potential configuration on Pi0-3
+with no v3d, but this is very unlikely).
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_kms.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_kms.c
+@@ -429,8 +429,14 @@ int vc4_kms_load(struct drm_device *dev)
+               return ret;
+       }
+ 
+-      dev->mode_config.max_width = 7680;
+-      dev->mode_config.max_height = 7680;
++      if (!drm_core_check_feature(dev, DRIVER_RENDER)) {
++              /* No V3D as part of vc4. Assume this is Pi4. */
++              dev->mode_config.max_width = 7680;
++              dev->mode_config.max_height = 7680;
++      } else {
++              dev->mode_config.max_width = 2048;
++              dev->mode_config.max_height = 2048;
++      }
+       dev->mode_config.funcs = &vc4_mode_funcs;
+       dev->mode_config.preferred_depth = 24;
+       dev->mode_config.async_page_flip = true;