linux/drivers/gpu/drm
Daniel Vetter 135c81b8c3 drm/i915: clean up crtc timings computation
In the old days of the crtc helpers we've only had the encoder and
crtc ->mode_fixup callbacks. So when the lvds connector wanted to
adjust the crtc timings it had to set a driver-private mode flag to
tell the crtc mode fixup code to not overwrite them with the generic
ones.

When converting things to the new infrastructure I've kept the entire
logic and only moved the flag to pipe_config->timings_set. But this
logic is pretty tricky and already caused regressions:

commit 21d8a4756a
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Fri Jul 12 08:07:30 2013 +0200

    drm/i915: fix pfit regression for non-autoscaled resolutions

So take advantage of the flexibility our own modeset infrastructure
affords us and prefill default crtc timings. This allows us to rip out
->timings_set. Note that we overwrite things again when retrying the
pipe config computation due to bandwidth constraints to avoid bogus
crtc timings if the encoder only does relative adjustments (which is
how the pfit code works). Only a theoretical concern though since
platforms where we retry (pch-split platforms) do not need
adjustements (since only the old gmch pfit needs that). But let's
better be safe than sorry.

Since we now initialize the crtc timings before calling the
encoder->compute_config functions the crtc initialization in the gmch
pfit code is now redudant and so can be removed.

Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
[danvet: Add a paragraph to the commit message to explain why we can
ditch the crtc timings initialization call from the gmch pfit code, to
answer a question from Rodrigo's review.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-08-04 21:25:27 +02:00
..
ast drm/ast: inline reservations 2013-06-28 12:04:04 +10:00
cirrus drm/cirrus: inline reservations 2013-06-28 12:04:05 +10:00
exynos drm/exynos: remove duplicated error routine and unnecessary assign 2013-07-04 15:55:37 +09:00
gma500 Merge branch 'gma500-fixes' of git://github.com/patjak/drm-gma500 into drm-fixes 2013-06-11 08:16:10 +10:00
i2c
i810 i810: VM_IO is set by io_remap_pfn_range() 2013-06-29 12:46:40 +04:00
i915 drm/i915: clean up crtc timings computation 2013-08-04 21:25:27 +02:00
mga
mgag200 drm/mgag200: inline reservations 2013-06-28 12:04:06 +10:00
nouveau drm/nouveau: do not allow negative sizes for now 2013-07-10 10:48:07 +10:00
omapdrm Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2013-07-09 16:04:31 -07:00
qxl Linux 3.10 2013-07-18 12:03:29 +02:00
r128
radeon drm/radeon/dpm: add debugfs support for RS780/RS880 (v3) 2013-07-17 16:47:52 -04:00
rcar-du drm/rcar-du: Use the GEM PRIME helpers 2013-07-17 15:44:01 +02:00
savage drm (ast, cirrus, mgag200, nouveau, savage, vmwgfx): Remove drm_mtrr_{add, del} 2013-05-31 13:02:54 +10:00
shmobile drm/shmobile: Use the GEM PRIME helpers 2013-07-17 15:43:55 +02:00
sis
tdfx
tilcdc drm/tilcdc: Clear bits of register we're going to set. 2013-06-28 09:13:00 +10:00
ttm drm: make drm_mm_init() return void 2013-07-02 13:34:41 +10:00
udl drm: Drop all the stub gamma_get, gamma_set, load_lut functions from drivers 2013-06-17 19:42:47 +10:00
via
vmwgfx drm/vmwgfx: get rid of ttm_bo_is_reserved usage 2013-06-28 12:04:14 +10:00
ati_pcigart.c
drm_agpsupport.c
drm_auth.c
drm_buffer.c
drm_bufs.c drm: Don't leak phys_wc "handles" to userspace 2013-05-31 13:37:39 +10:00
drm_cache.c
drm_context.c
drm_crtc_helper.c drm/crtc-helper: explicit DPMS on after modeset 2013-07-22 09:55:17 +10:00
drm_crtc.c drm: add hotspot support for cursors. 2013-06-28 09:13:39 +10:00
drm_debugfs.c
drm_dma.c
drm_dp_helper.c
drm_drv.c drm: add hotspot support for cursors. 2013-06-28 09:13:39 +10:00
drm_edid_load.c drm: avoid warning in drm_load_edid_firmware() 2013-07-10 14:21:46 -07:00
drm_edid.c drm: add assertion for checking null edid to drm_edid_block_valid 2013-07-04 10:52:50 +10:00
drm_encoder_slave.c
drm_fb_cma_helper.c treewide: Fix typo in printk 2013-05-28 12:02:13 +02:00
drm_fb_helper.c drm/fb-helper: Make load_lut and gamma_set/gamma_get hooks optional 2013-06-17 19:42:47 +10:00
drm_fops.c drm: fix error routines in drm_open_helper 2013-07-04 10:53:37 +10:00
drm_gem_cma_helper.c drm/cma: remove GEM CMA specific dma_buf functionality 2013-07-05 15:44:54 +10:00
drm_gem.c drm: make drm_mm_init() return void 2013-07-02 13:34:41 +10:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_ioc32.c
drm_ioctl.c drm: Don't leak phys_wc "handles" to userspace 2013-05-31 13:37:39 +10:00
drm_irq.c drm: fix a use-after-free when GPU acceleration disabled 2013-06-03 19:12:04 +10:00
drm_lock.c
drm_memory.c
drm_mm.c Merge commit 'Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux' 2013-07-25 15:18:41 +02:00
drm_modes.c drm: Sort connector modes based on vrefresh 2013-06-11 08:35:51 +10:00
drm_pci.c drm, agpgart: Use pgprot_writecombine for AGP maps and make the MTRR optional 2013-05-31 13:37:31 +10:00
drm_platform.c
drm_prime.c drm: add mmap function to prime helpers 2013-07-05 15:44:44 +10:00
drm_proc.c
drm_rect.c
drm_scatter.c
drm_stub.c drm: drm_stub: Fixing return value if driver master_set call failed 2013-06-27 21:03:16 +10:00
drm_sysfs.c drm: Convert drm class driver from legacy pm ops to dev_pm_ops 2013-07-04 10:50:26 +10:00
drm_trace_points.c
drm_trace.h drm: fix print format of sequence in trace point 2013-07-04 10:55:27 +10:00
drm_usb.c
drm_vm.c drm: io_remap_pfn_range() sets VM_IO... 2013-06-29 12:46:39 +04:00
Kconfig drm/nouveau: always select ACPI_VIDEO if ACPI is enabled. 2013-06-28 11:56:22 +10:00
Makefile drm: Renesas R-Car Display Unit DRM driver 2013-06-27 10:08:04 +10:00
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