The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs can capture and compress video data from digital or analog sources. With the Aspeed chip acting as a service processor, the Video Engine can capture the host processor graphics output. This series adds a V4L2 driver for the VE, providing a read() interface only. The driver triggers the hardware to capture the host graphics output and compress it to JPEG format. Testing on an AST2500 determined that the videobuf/streaming/mmap interface was significantly slower than the simple read() interface, so I have not included the streaming part. It's also possible to use an automatic mode for the VE such that re-triggering the HW every frame isn't necessary. However this wasn't reliable on the AST2400, and probably used more CPU anyway due to excessive interrupts. It was approximately 15% faster. The series also adds the necessary parent clock definitions to the Aspeed clock driver, with both a mux and clock divider. Eddie James (4): clock: aspeed: Add VIDEO reset index definition clock: aspeed: Setup video engine clocking dt-bindings: media: Add Aspeed Video Engine binding documentation media: platform: Add Aspeed Video Engine driver .../devicetree/bindings/media/aspeed-video.txt | 23 + drivers/clk/clk-aspeed.c | 41 +- drivers/media/platform/Kconfig | 8 + drivers/media/platform/Makefile | 1 + drivers/media/platform/aspeed-video.c | 1307 ++++++++++++++++++++ include/dt-bindings/clock/aspeed-clock.h | 1 + 6 files changed, 1379 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/media/aspeed-video.txt create mode 100644 drivers/media/platform/aspeed-video.c -- 1.8.3.1
