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42f14c4b45
linux/drivers/gpu/drm
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Alex Deucher 42f14c4b45 drm/radeon/kms: fix shared ddc harder 
This fixes a regression caused by b2ea4aa67b
due to the way shared ddc with multiple digital connectors was handled.

You generally have two cases where DDC lines are shared:
- HDMI + VGA
- HDMI + DVI-D

HDMI + VGA is easy to deal with because you can check the EDID for the
to see if the attached monitor is digital.  A shared DDC line with two
digital connectors is more complex.  You can't use the hdmi bits in the
EDID since they may not be there with DVI<->HDMI adapters.  In this case
all we can do is check the HPD pins to see which is connected as we have
no way of knowing using the EDID.

Reported-by: trapdoor6@gmail.com
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-07-21 08:37:25 +10:00
..
i2c drm/i2c/ch7006: Fix load detection false positives right after system init. 2009-12-16 17:04:45 +10:00
i810 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
i830 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
i915 drm/i915: enable low power render writes on GEN3 hardware. 2010-07-20 15:24:18 +10:00
mga drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
nouveau drm/nv50: fix iommu errors caused by device reading from address 0 2010-06-08 11:03:45 +10:00
r128 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
radeon drm/radeon/kms: fix shared ddc harder 2010-07-21 08:37:25 +10:00
savage drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
sis drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
tdfx drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
ttm drm/ttm: Fix build on architectures without AGP 2010-07-20 15:24:06 +10:00
via Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-04 19:08:12 -07:00
vmwgfx vmwgfx: return -EFAULT if copy_to_user fails 2010-07-20 15:24:11 +10:00
ati_pcigart.c ati_pcigart: fix printk format warning 2010-02-05 11:46:48 +10:00
drm_agpsupport.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_auth.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_buffer.c drm: Add generic multipart buffer. 2010-02-23 09:46:20 +10:00
drm_bufs.c Merge branch 'master' into for-next 2010-04-23 02:08:44 +02:00
drm_cache.c
drm_context.c
drm_crtc_helper.c drm/kms: disable/enable poll around switcheroo on/off 2010-06-01 10:36:02 +10:00
drm_crtc.c drm/drm_crtc: return -EFAULT on copy_to_user errors 2010-06-08 09:33:35 +10:00
drm_debugfs.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_dma.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_dp_i2c_helper.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_drawable.c
drm_drv.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_edid.c drm/edid: Allow non-fatal checksum errors in CEA blocks 2010-05-26 10:29:58 +10:00
drm_encoder_slave.c
drm_fb_helper.c drm: correctly update connector DPMS status in drm_fb_helper 2010-07-07 14:21:39 +10:00
drm_fops.c drivers/gpu/drm: Use kzalloc 2010-05-18 15:57:05 +10:00
drm_gem.c drm: free core gem object from driver callbacks 2010-04-20 13:19:33 +10:00
drm_hashtab.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_info.c
drm_ioc32.c drm: convert drm_ioctl to unlocked_ioctl 2009-12-18 11:22:31 +10:00
drm_ioctl.c
drm_irq.c Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-04-27 08:22:50 -07:00
drm_lock.c
drm_memory.c drivers/gpu/drm/drm_memory.c: fix check for end of loop 2010-04-28 18:41:51 +10:00
drm_mm.c drm: Fix a bug in the range manager. 2010-02-15 11:19:14 +10:00
drm_modes.c drm/edid: Fix sync polarity for secondary GTF curve 2010-04-09 10:05:40 +10:00
drm_pci.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_proc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_scatter.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
drm_sman.c
drm_stub.c Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-04-20 09:20:11 -07:00
drm_sysfs.c Merge branch 'drm-for-2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-21 11:14:52 -07:00
drm_vm.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig drm/radeon: fix power supply kconfig interaction. 2010-05-21 15:41:20 +10:00
Makefile drm: Add generic multipart buffer. 2010-02-23 09:46:20 +10:00
README.drm

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