mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
9a93585699
This is the core of the new modeset logic. The current code which is based upon the crtc helper code first updates all the link of the new display pipeline and then calls the lower-level set_mode function to execute the required callbacks to get there. The issue with this approach is that for disabling we need to know the _current_ display pipe state, not the new one. Hence we need to stage the new state of the display pipe and only update it once we have disabled the current configuration and before we start to update the hw registers with the new configuration. This patch here just prepares the ground by switching the new output state computation to these staging pointers. To make it clearer, rename the old update_output_state function to stage_output_state. A few peculiarities: - We're also calling the set_mode function at various places to update properties. Hence after a successfule modeset we need to stage the current configuration (for otherwise we might fall back again). This happens automatically because as part of the (successful) modeset we need to copy the staged state to the real one. But for the hw readout code we need to make sure that this happens, too. - Teach the new staged output state computation code the required smarts to handle the disabling of outputs. The current code handles this in a special case, but to better handle global modeset changes covering more than one crtc, we want to do this all in the same low-level modeset code. - The actual modeset code is still a bit ugly and wants to know the new crtc->enabled state a bit early. Follow-on patches will clean that up, for now we have to apply the staged output configuration early, outside of the set_mode functions. - Improve/add comments in stage_output_state. Essentially all that is left to do now is move the disabling code into set_mode and then move the staged state update code also into set_mode, at the right place between disabling things and calling the mode_set callbacks for the new configuration. v2: Disabling a crtc works by passing in a NULL mode or fb, userspace doesn't hand in the list of connectors. We therefore need to detect this case manually and tear down all the output links. v3: Properly update the output staging pointers after having read out the hw state. v4: Simplify the code, add more DRM_DEBUG_KMS output and check a few assumptions with WARN_ON. Essentially all things that I've noticed while debugging issues in other places of the code. v4: Correctly disable the old set of connectors when enabling an already enabled crtc on a new set of crtc. Reported by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> |
||
|---|---|---|
| .. | ||
| ast | ||
| cirrus | ||
| exynos | ||
| gma500 | ||
| i2c | ||
| i810 | ||
| i915 | ||
| mga | ||
| mgag200 | ||
| nouveau | ||
| r128 | ||
| radeon | ||
| savage | ||
| sis | ||
| tdfx | ||
| ttm | ||
| udl | ||
| via | ||
| vmwgfx | ||
| ati_pcigart.c | ||
| drm_agpsupport.c | ||
| drm_auth.c | ||
| drm_buffer.c | ||
| drm_bufs.c | ||
| drm_cache.c | ||
| drm_context.c | ||
| drm_crtc_helper.c | ||
| drm_crtc.c | ||
| drm_debugfs.c | ||
| drm_dma.c | ||
| drm_dp_i2c_helper.c | ||
| drm_drv.c | ||
| drm_edid_load.c | ||
| drm_edid_modes.h | ||
| drm_edid.c | ||
| drm_encoder_slave.c | ||
| drm_fb_helper.c | ||
| drm_fops.c | ||
| drm_gem.c | ||
| drm_global.c | ||
| drm_hashtab.c | ||
| drm_info.c | ||
| drm_ioc32.c | ||
| drm_ioctl.c | ||
| drm_irq.c | ||
| drm_lock.c | ||
| drm_memory.c | ||
| drm_mm.c | ||
| drm_modes.c | ||
| drm_pci.c | ||
| drm_platform.c | ||
| drm_prime.c | ||
| drm_proc.c | ||
| drm_scatter.c | ||
| drm_stub.c | ||
| drm_sysfs.c | ||
| drm_trace_points.c | ||
| drm_trace.h | ||
| drm_usb.c | ||
| drm_vm.c | ||
| Kconfig | ||
| Makefile | ||
| README.drm | ||
************************************************************
* For the very latest on DRI development, please see: *
* http://dri.freedesktop.org/ *
************************************************************
The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).
The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:
1. The DRM provides synchronized access to the graphics hardware via
the use of an optimized two-tiered lock.
2. The DRM enforces the DRI security policy for access to the graphics
hardware by only allowing authenticated X11 clients access to
restricted regions of memory.
3. The DRM provides a generic DMA engine, complete with multiple
queues and the ability to detect the need for an OpenGL context
switch.
4. The DRM is extensible via the use of small device-specific modules
that rely extensively on the API exported by the DRM module.
Documentation on the DRI is available from:
http://dri.freedesktop.org/wiki/Documentation
http://sourceforge.net/project/showfiles.php?group_id=387
http://dri.sourceforge.net/doc/
For specific information about kernel-level support, see:
The Direct Rendering Manager, Kernel Support for the Direct Rendering
Infrastructure
http://dri.sourceforge.net/doc/drm_low_level.html
Hardware Locking for the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/hardware_locking_low_level.html
A Security Analysis of the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/security_low_level.html