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8480adacfd
Dynamically assign a right mixer to mdp5_crtc_state in the CRTC's atomic_check path. Assigning the right mixer has some constraints, i.e, only a few LMs can be paired together. Update mdp5_mixer_assign to handle these constraints. Firstly, we need to identify whether we need a right mixer or not. At the moment, there are 2 scenarios where a right mixer might be needed: - If any of the planes connected to this CRTC is too wide (i.e, is comprised of 2 hwpipes). - If the CRTC's mode itself is too wide (i.e, a 4K mode on HDMI). We implement both these checks in the mdp5_crtc_atomic_check(), and pass 'need_right_mixer' to mdp5_setup_pipeline. If a CRTC is already assigned a single mixer, and a new atomic commit brings in a drm_plane that needs 2 hwpipes, we can successfully commit this mode without requiring a full modeset, provided that we still use the previously assigned mixer as the left mixer. If such an assignment isn't possible, we'd need to do a full modeset. This scenario has been ignored for now. The mixer assignment code is a bit messy, considering we have at most 4 LM instances in hardware. This can probably be re-visited later with simplified logic. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com> |
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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.