Hi everybody, This patch set implements support for storing the frame buffer contents in the on-chip SRAM (MERAM). This will allow keeping the display on while putting system memory in a low-power mode (assuming the CPU is idle). The main use case is to reduce power consumption on mobile platforms when the user doesn't interact with the device and lets it lock itself automatically after a short timeout. This is a first implementation and improvements are possible (such as copying the frame buffer content using DMA, possibly through the VEU to handle format conversion). I've tested it on a Mackerel board. Laurent Pinchart (6): sh_mobile_meram: Rename operations to cache_[alloc|free|update] sh_mobile_meram: Use direct function calls for the public API sh_mobile_meram: Add direct MERAM allocation API fbdev: sh_mobile_lcdc: Fix pan offset computation in YUV mode fbdev: sh_mobile_lcdc: Destroy mutex at remove time fbdev: sh_mobile_lcdc: Added MERAM-backed frame buffer support drivers/video/sh_mobile_lcdcfb.c | 254 +++++++++++++++++++++++++++---------- drivers/video/sh_mobile_lcdcfb.h | 10 ++- drivers/video/sh_mobile_meram.c | 227 +++++++++++++++++++--------------- include/video/sh_mobile_lcdc.h | 1 + include/video/sh_mobile_meram.h | 71 ++++++++--- 5 files changed, 370 insertions(+), 193 deletions(-) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
