Robert Bragg f279020a02 drm/i915/perf: avoid read back of head register ... There's no need for the driver to keep reading back the head pointer from hardware since the hardware doesn't update it automatically. This way we can treat any invalid head pointer value as a software/driver bug instead of spurious hardware behaviour. This change is also a small stepping stone towards re-working how the head and tail state is managed as part of an improved workaround for the tail register race condition. Signed-off-by: Robert Bragg <robert@sixbynine.org> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/20170511154345.962-4-lionel.g.landwerlin@intel.com		2017-05-13 10:59:39 +01:00
..
amd	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
arc
arm	drm: mali-dp: use div_u64 for expensive 64-bit divisions	2017-04-26 17:54:58 +01:00
armada	dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro	2017-04-20 13:47:46 +05:30
ast	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
atmel-hlcdc	drm: atmel-hlcdc: Uninitialized return in atmel_hlcdc_create_outputs()	2017-04-18 11:52:45 +02:00
bochs	drm/ttm: add io_mem_pfn callback	2017-04-04 23:33:42 -04:00
bridge	drm: dw-hdmi: Implement the mode_fixup drm helper	2017-04-10 14:53:10 +05:30
cirrus	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
etnaviv	Linux 4.11-rc7	2017-04-19 11:07:14 +10:00
exynos	drm: convert drivers to use drm_of_find_panel_or_bridge	2017-04-06 17:00:27 -04:00
fsl-dcu	drm: convert drivers to use drm_of_find_panel_or_bridge	2017-04-06 17:00:27 -04:00
gma500	drm: Add acquire ctx to ->gamma_set hook	2017-04-06 10:21:55 +02:00
hisilicon	drm: convert drivers to use drm_of_find_panel_or_bridge	2017-04-06 17:00:27 -04:00
i2c
i810
i915	drm/i915/perf: avoid read back of head register	2017-05-13 10:59:39 +01:00
imx	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
lib
mediatek	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
meson	drm: convert drivers to use of_graph_get_remote_node	2017-04-06 17:00:27 -04:00
mga
mgag200	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
msm	Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next	2017-04-11 07:47:02 +10:00
mxsfb	drm: convert drivers to use drm_of_find_panel_or_bridge	2017-04-06 17:00:27 -04:00
nouveau	Merge branch 'linux-4.12' of git://github.com/skeggsb/linux into drm-next	2017-05-02 04:46:01 +10:00
omapdrm	dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro	2017-04-20 13:47:46 +05:30
panel	drm/panel: Changes for v4.12-rc1	2017-04-13 06:17:40 +10:00
qxl	drm/ttm: add io_mem_pfn callback	2017-04-04 23:33:42 -04:00
r128
radeon	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
rcar-du	drm: rcar-du: Add HDMI outputs to R8A7795 device description	2017-04-04 17:04:21 +03:00
rockchip	drm/rockchip: Shutdown all crtcs when unbinding drm	2017-04-07 13:28:32 -04:00
savage
selftests
shmobile	drm: Add acquire ctx parameter to ->page_flip(_target)	2017-03-29 09:50:38 +02:00
sis
sti	drm/sti: fix GDP size to support up to UHD resolution	2017-04-13 11:46:35 +02:00
sun4i	Allwinner DRM changes for 4.12	2017-04-20 13:19:34 +10:00
tdfx
tegra	dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro	2017-04-20 13:47:46 +05:30
tilcdc	drm: convert drivers to use of_graph_get_remote_node	2017-04-06 17:00:27 -04:00
tinydrm	drm/atomic: Introduce drm_atomic_helper_shutdown	2017-03-27 09:43:58 +02:00
ttm	Linux 4.11-rc6	2017-04-11 07:40:42 +10:00
udl	Merge tag 'drm-misc-next-fixes-2017-04-20' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-21 13:51:59 +10:00
vc4	Linux 4.11-rc6	2017-04-11 07:40:42 +10:00
vgem	Pointer for Markus's image conversion work.	2017-03-14 15:07:33 +01:00
via
virtio	Merge tag 'drm-misc-next-2017-04-07' of git://anongit.freedesktop.org/git/drm-misc into drm-next	2017-04-11 07:41:10 +10:00
vmwgfx	drm/vmwgfx: Convert macro to octal representation	2017-04-21 09:25:47 -07:00
zte	drm: zte: remove leftover 'inf' from struct zx_hdmi	2017-03-22 13:44:42 +08:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c	drm/atomic: Add connector atomic_check function, v2.	2017-04-06 17:00:27 -04:00
drm_atomic.c	drm: extract legacy framebuffer remove	2017-04-06 10:22:43 +02:00
drm_auth.c
drm_blend.c
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_color_mgmt.c	drm/atomic-helper: Remove legacy backoff hack from gamma_set	2017-04-06 10:22:35 +02:00
drm_connector.c
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c	drm: Add acquire ctx parameter to ->set_config	2017-03-29 09:56:25 +02:00
drm_crtc_internal.h	drm: extract legacy framebuffer remove	2017-04-06 10:22:43 +02:00
drm_crtc.c	drm: Take mode_config.mutex in setcrtc ioctl	2017-04-06 22:49:50 +02:00
drm_debugfs_crc.c	Revert "drm: Don't allow interruptions when opening debugfs/crc"	2017-04-07 16:18:28 -04:00
drm_debugfs.c	drm/debugfs: Add kerneldoc	2017-03-24 09:36:06 +01:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c
drm_dp_helper.c
drm_dp_mst_topology.c	drm/dp: Split drm_dp_mst_allocate_vcpi	2017-03-22 21:47:44 +01:00
drm_drv.c
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c	Linux 4.11-rc3	2017-03-23 12:05:13 +10:00
drm_encoder_slave.c
drm_encoder.c
drm_fb_cma_helper.c	drm: Add mode_config .get_format_info() hook	2017-03-22 19:45:00 +02:00
drm_fb_helper.c	drm/fb-helper: Extract _legacy kms functions	2017-04-06 10:23:06 +02:00
drm_file.c	drm/gem: Add DEFINE_DRM_GEM_FOPS	2017-03-14 14:38:34 +01:00
drm_flip_work.c
drm_fourcc.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux into drm-misc-next	2017-03-23 08:15:55 +01:00
drm_framebuffer.c	drm: extract legacy framebuffer remove	2017-04-06 10:22:43 +02:00
drm_gem_cma_helper.c	Pointer for Markus's image conversion work.	2017-03-14 15:07:33 +01:00
drm_gem.c
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h	drm/debugfs: Add kerneldoc	2017-03-24 09:36:06 +01:00
drm_ioc32.c	drm: document drm_ioctl.[hc]	2017-04-04 20:47:54 +02:00
drm_ioctl.c	drm: Pass CRTC ID in userspace vblank events	2017-04-04 20:59:12 +01:00
drm_irq.c	drm: Pass CRTC ID in userspace vblank events	2017-04-04 20:59:12 +01:00
drm_kms_helper_common.c	drm: Remove drmP.h include from drm_kms_helper_common.c	2017-03-09 16:18:02 +01:00
drm_legacy.h
drm_lock.c
drm_memory.c
drm_mipi_dsi.c
drm_mm.c
drm_mode_config.c
drm_mode_object.c	Pointer for Markus's image conversion work.	2017-03-14 15:07:33 +01:00
drm_modes.c
drm_modeset_helper.c	drm: Add mode_config .get_format_info() hook	2017-03-22 19:45:00 +02:00
drm_modeset_lock.c	drm: Remove drm_modeset_legacy_acquire_ctx and crtc->acquire_ctx	2017-04-05 09:26:45 +02:00
drm_of.c	drm: of: introduce drm_of_find_panel_or_bridge	2017-04-06 17:00:27 -04:00
drm_panel.c
drm_pci.c	drm: Extract drm_pci.h	2017-03-09 16:18:02 +01:00
drm_plane_helper.c	drm: Add acquire ctx parameter to ->set_config	2017-03-29 09:56:25 +02:00
drm_plane.c	drm: Only take cursor locks when the cursor plane exists	2017-04-07 13:28:32 -04:00
drm_prime.c	dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro	2017-04-20 13:47:46 +05:30
drm_print.c
drm_probe_helper.c	drm/atomic: Acquire connection_mutex lock in drm_helper_probe_single_connector_modes, v4.	2017-04-06 21:29:23 +02:00
drm_property.c	drm: Fix get_property logic fumble	2017-04-12 18:11:32 +02:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c	drm/edid: detect SCDC support in HF-VSDB	2017-03-21 10:15:56 +02:00
drm_simple_kms_helper.c	drm: Clarify the role of plane_state argument to drm_simple update().	2017-03-30 12:02:00 -07:00
drm_sysfs.c	drm: Consolidate and document sysfs support	2017-04-04 20:47:54 +02:00
drm_trace_points.c
drm_trace.h	drm: Remove drm_pending_event->pid	2017-03-14 14:38:33 +01:00
drm_vm.c
drm_vma_manager.c
Kconfig
Makefile	drm: Add SCDC helpers	2017-03-21 10:15:39 +02:00