linux-kernel - [PATCH] drm/fourcc: Add Arm 16x16 block modifier

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Date:   Fri, 21 Jun 2019 10:21:08 +0000
From:   Raymond Smith <Raymond.Smith@....com>
To:     "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "yuq825@...il.com" <yuq825@...il.com>,
        Ayan Halder <Ayan.Halder@....com>,
        Brian Starkey <Brian.Starkey@....com>,
        "malidp@...s.arm.com" <malidp@...s.arm.com>, nd <nd@....com>,
        Raymond Smith <Raymond.Smith@....com>
Subject: [PATCH] drm/fourcc: Add Arm 16x16 block modifier

Add the DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED modifier to
denote the 16x16 block u-interleaved format used in Arm Utgard and
Midgard GPUs.

Signed-off-by: Raymond Smith <raymond.smith@....com>
---
 include/uapi/drm/drm_fourcc.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 3feeaa3..8ed7ecf 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -743,6 +743,16 @@ extern "C" {
 #define AFBC_FORMAT_MOD_BCH     (1ULL << 11)
 
 /*
+ * Arm 16x16 Block U-Interleaved modifier
+ *
+ * This is used by Arm Mali Utgard and Midgard GPUs. It divides the image
+ * into 16x16 pixel blocks. Blocks are stored linearly in order, but pixels
+ * in the block are reordered.
+ */
+#define DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED \
+	fourcc_mod_code(ARM, ((1ULL << 55) | 1))
+
+/*
  * Allwinner tiled modifier
  *
  * This tiling mode is implemented by the VPU found on all Allwinner platforms,
-- 
2.7.4