Talos™ II Linux sources for OpenBMC https://git.raptorcs.com/git/talos-obmc-linux/atom?h=dev-4.13 2018-04-20T06:40:23+00:00 2018-04-20T06:40:23+00:00 Joel Stanley joel@jms.id.au 2018-04-19T04:20:01+00:00 urn:sha1:84532683d1b8b2c570a9e60c511c96271a9f3b56 This exposes the GFX registers in debugfs for debugging. The idea is borrowed from the Broadcom driver. OpenBMC-Staging-Count: 1 Signed-off-by: Joel Stanley <joel@jms.id.au> 2018-04-20T06:40:20+00:00 Joel Stanley joel@jms.id.au 2018-04-19T04:20:00+00:00 urn:sha1:dff934c53f7f36636751b162a88ee3b0dc05c1bf This driver is for the ASPEED BMC SoC's GFX display hardware. This driver runs on the ARM based BMC systems, unlike the ast driver which runs on a host CPU and is is for a PCI graphics device. The AST2500 supports a total of 3 output paths: 1. VGA output, the output target can choose either or both to the DAC or DVO interface. 2. Graphics CRT output, the output target can choose either or both to the DAC or DVO interface. 3. Video input from DVO, the video input can be used for video engine capture or DAC display output. Output options are selected in SCU2C. The "VGA mode" device is the PCI attached controller. The "Graphics CRT" is the ARM's internal display controller. The driver only supports a simple configuration consisting of a 40MHz pixel clock, fixed by hardware limitations, and the VGA output path. OpenBMC-Staging-Count: 1 Signed-off-by: Joel Stanley <joel@jms.id.au>