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Requests for assigning/freeing SMP blocks by planes are collected during the atomic check phase, and represented by mdp5_smp_state's 'assigned' and 'released' members. Once the atomic state is committed, these members are reset to 0, indicating that the existing configuration satisfies all the planes. Future atomic commits will copy the old mdp5_smp_state, and the 'assigned' and 'released' members would be updated only if there was a change in the plane configurations. When we disable and re-enable display, we lose the values we wrote to the SMP registers, but the code doesn't program the registers because there isn't any change in mdp5_smp_state. Fix this by writing to the registers irrespective of whether there was a change in SMP state or not. We do this by keeping a cache of the register values, and write them every time we commit a state. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com> |
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| README | ||
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.