From: Neil Armstrong <narmstrong@baylibre.com>
To: daniel@ffwll.ch, dri-devel@lists.freedesktop.org
Cc: mjourdan@baylibre.com, Neil Armstrong <narmstrong@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
linux-kernel@vger.kernel.org, ppaalanen@gmail.com,
linux-amlogic@lists.infradead.org, brian.starkey@arm.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 1/8] drm/fourcc: Add modifier definitions for describing Amlogic Video Framebuffer Compression
Date: Wed, 25 Mar 2020 09:50:18 +0100 [thread overview]
Message-ID: <20200325085025.30631-2-narmstrong@baylibre.com> (raw)
In-Reply-To: <20200325085025.30631-1-narmstrong@baylibre.com>
Amlogic uses a proprietary lossless image compression protocol and format
for their hardware video codec accelerators, either video decoders or
video input encoders.
It considerably reduces memory bandwidth while writing and reading
frames in memory.
The underlying storage is considered to be 3 components, 8bit or 10-bit
per component, YCbCr 420, single plane :
- DRM_FORMAT_YUV420_8BIT
- DRM_FORMAT_YUV420_10BIT
This modifier will be notably added to DMA-BUF frames imported from the V4L2
Amlogic VDEC decoder.
This introduces the basic layout composed of:
- a body content organized in 64x32 superblocks with 4096 bytes per
superblock in default mode.
- a 32 bytes per 128x64 header block
This layout is tranferrable between Amlogic SoCs supporting this modifier.
Tested-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
include/uapi/drm/drm_fourcc.h | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 8bc0b31597d8..6564813d2f7a 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -309,6 +309,7 @@ extern "C" {
#define DRM_FORMAT_MOD_VENDOR_BROADCOM 0x07
#define DRM_FORMAT_MOD_VENDOR_ARM 0x08
#define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09
+#define DRM_FORMAT_MOD_VENDOR_AMLOGIC 0x0a
/* add more to the end as needed */
@@ -804,6 +805,35 @@ extern "C" {
*/
#define DRM_FORMAT_MOD_ALLWINNER_TILED fourcc_mod_code(ALLWINNER, 1)
+/*
+ * Amlogic Video Framebuffer Compression modifiers
+ *
+ * Amlogic uses a proprietary lossless image compression protocol and format
+ * for their hardware video codec accelerators, either video decoders or
+ * video input encoders.
+ *
+ * It considerably reduces memory bandwidth while writing and reading
+ * frames in memory.
+ *
+ * The underlying storage is considered to be 3 components, 8bit or 10-bit
+ * per component YCbCr 420, single plane :
+ * - DRM_FORMAT_YUV420_8BIT
+ * - DRM_FORMAT_YUV420_10BIT
+ */
+#define DRM_FORMAT_MOD_AMLOGIC_FBC(__modes) fourcc_mod_code(AMLOGIC, __modes)
+
+/*
+ * Amlogic FBC Basic Layout
+ *
+ * The basic layout is composed of:
+ * - a body content organized in 64x32 superblocks with 4096 bytes per
+ * superblock in default mode.
+ * - a 32 bytes per 128x64 header block
+ *
+ * This layout is transferrable between Amlogic SoCs supporting this modifier.
+ */
+#define DRM_FORMAT_MOD_AMLOGIC_FBC_LAYOUT_BASIC (1ULL << 0)
+
#if defined(__cplusplus)
}
#endif
--
2.22.0
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next prev parent reply other threads:[~2020-03-25 8:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 8:50 [PATCH v4 0/8] drm/meson: add support for Amlogic Video FBC Neil Armstrong
2020-03-25 8:50 ` Neil Armstrong [this message]
2020-03-25 8:50 ` [PATCH v4 2/8] drm/meson: add Amlogic Video FBC registers Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 3/8] drm/meson: overlay: setup overlay for Amlogic FBC Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 4/8] drm/meson: crtc: handle commit of Amlogic FBC frames Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 5/8] drm/fourcc: amlogic: Add modifier definitions for Memory Saving option Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 6/8] drm/meson: overlay: setup overlay for Amlogic FBC Memory Saving mode Neil Armstrong
2020-03-25 8:50 ` [PATCH v4 7/8] drm/fourcc: amlogic: Add modifier definitions for the Scatter layout Neil Armstrong
2020-03-25 9:04 ` Simon Ser
2020-03-25 10:24 ` Neil Armstrong
2020-03-25 13:49 ` Pekka Paalanen
2020-03-25 16:18 ` Neil Armstrong
2020-03-26 9:36 ` Pekka Paalanen
2020-03-27 14:14 ` Neil Armstrong
2020-03-30 14:41 ` Pekka Paalanen
2020-03-25 8:50 ` [PATCH v4 8/8] drm/meson: overlay: setup overlay for Amlogic FBC Scatter Memory layout Neil Armstrong
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