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6752bea8b0
linux_dsm_epyc7002/drivers/gpu/drm
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Nicholas Kazlauskas 6752bea8b0 drm/amd/display: Prevent cursor hotspot overflow for RV overlay planes 
[Why]
The actual position for the cursor on the screen is essentially:

x_out = x - x_plane - x_hotspot
y_out = y - y_plane - y_hotspot

The register values for cursor position and cursor hotspot need to be
greater than zero when programmed, but we also need to subtract off
the plane position to display the cursor at the correct position.

Since we don't want x or y to be less than zero, we add the plane
position as a positive value to x_hotspot or y_hotspot. However, what
this doesn't take into account is that the hotspot registers are limited
by the maximum cursor size.

On DCN10 the cursor hotspot regitsers are masked to 0xFF, so they have
a maximum value of 0-255. Values greater this will wrap, causing the
cursor to display in the wrong position.

In practice this means that for sufficiently large plane positions, the
cursor will be drawn twice on the screen, and can cause screen flashes
or p-state WARNS depending on what the wrapped value is.

So we need a way to remove the value from x_plane and y_plane without
exceeding the maximum cursor size.

[How]
Subtract as much as x_plane/y_plane as possible from x and y and place
the remainder in the cursor hotspot register.

The value for x_hotspot and y_hotspot can still wrap around but it
won't happen in a case where the cursor is actually enabled.

The cursor plane needs to intersect at least one pixel of the plane's
rectangle to be enabled, so the cursor position + hotspot provided by
userspace must always be strictly less than the maximum cursor size for
the cursor to actually be enabled.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-04-03 11:57:22 -05:00
..
amd drm/amd/display: Prevent cursor hotspot overflow for RV overlay planes 2019-04-03 11:57:22 -05:00
arc drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
arm Merge commit 'refs/for-upstream/mali-dp' of git://linux-arm.org/linux-ld into drm-next 2019-04-03 13:44:40 +10:00
armada drm/armada: Use drm_fb_helper_fill_info 2019-03-27 09:56:14 +01:00
ast Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
atmel-hlcdc drm/irq: Don't check for DRIVER_HAVE_IRQ in drm_irq_(un)install 2019-01-29 15:45:06 +01:00
bochs Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
bridge drm/bridge: ti-tfp410: Report input bus config through bridge timings 2019-03-18 11:42:13 +02:00
cirrus Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
etnaviv drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
exynos drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
fsl-dcu drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags 2019-03-18 11:42:13 +02:00
gma500 drm/gma500: Use drm_fb_helper_fill_info 2019-03-27 09:57:28 +01:00
hisilicon Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
i2c drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
i810
i915 drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
imx drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
lib
mediatek drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
meson drm/meson: exclusively use the canvas provider module 2019-03-20 09:28:39 +01:00
mga drm/irq: Ditch DRIVER_IRQ_SHARED 2019-01-29 15:45:21 +01:00
mgag200 Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
msm drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
mxsfb drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags 2019-03-18 11:42:13 +02:00
nouveau Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
omapdrm drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
panel drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
pl111 drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags 2019-03-18 11:42:13 +02:00
qxl Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
r128 drm/irq: Ditch DRIVER_IRQ_SHARED 2019-01-29 15:45:21 +01:00
radeon Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
rcar-du drm: rcar-du: lvds: Set LVEN and LVRES bits together on D3 2019-03-28 06:12:42 +02:00
rockchip drm/rockchip: Use drm_fb_helper_fill_info 2019-03-27 10:05:37 +01:00
savage drm/savage: mark expected switch fall-throughs 2019-01-30 17:35:29 +01:00
scheduler Merge branch 'drm-next-5.1' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-02-22 15:56:42 +10:00
selftests drm/selftests/mm: Switch to bitmap_zalloc() 2019-03-20 17:36:06 +00:00
shmobile drm/irq: Don't check for DRIVER_HAVE_IRQ in drm_irq_(un)install 2019-01-29 15:45:06 +01:00
sis
sti drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
stm drm/stm: fix CONFIG_FB dependency 2019-03-11 15:40:29 +01:00
sun4i drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
tdfx
tegra drm/tegra: Use drm_fb_helper_fill_info 2019-03-27 10:06:02 +01:00
tilcdc drm/irq: Don't check for DRIVER_HAVE_IRQ in drm_irq_(un)install 2019-01-29 15:45:06 +01:00
tinydrm tinydrm/mipi-dbi: Use dma-safe buffers for all SPI transfers 2019-03-20 12:02:41 +01:00
ttm drm/ttm: Fix spelling of "KiB" 2019-03-19 15:04:03 -05:00
tve200 drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags 2019-03-18 11:42:13 +02:00
udl drm-misc-next for 5.2: 2019-03-29 14:03:01 +10:00
v3d drm/v3d: Use the new shmem helpers to reduce driver boilerplate. 2019-03-14 12:06:44 -07:00
vboxvideo Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
vc4 drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
vgem dma-buf: make fence sequence numbers 64 bit v2 2018-12-07 12:44:16 +01:00
via drm/via: mark expected switch fall-throughs 2019-01-30 17:35:29 +01:00
virtio Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
vkms drm: vkms: check status of alloc_ordered_workqueue 2019-03-25 09:33:42 +01:00
vmwgfx Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
xen drm/drv: drm_dev_unplug(): Move out drm_dev_put() call 2019-02-21 12:11:58 +01:00
zte drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
ati_pcigart.c drm/ati_pcigart: Fix error code in drm_ati_pcigart_init() 2018-12-17 10:47:17 +01:00
drm_agpsupport.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_atomic_helper.c drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
drm_atomic_state_helper.c drm: writeback: Fix leak of writeback job 2019-03-18 17:24:32 +02:00
drm_atomic_uapi.c drm-misc-next for 5.2: 2019-03-25 11:05:12 +01:00
drm_atomic.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_auth.c drm: set is_master to 0 upon drm_new_set_master() failure 2018-11-26 16:14:27 -05:00
drm_blend.c drm: Clarify DRM_MODE_REFLECT_X/Y documentation 2018-09-11 11:21:30 +01:00
drm_bridge.c drm: bridge: Constify mode arguments to bridge .mode_set() operation 2019-01-14 03:51:14 +02:00
drm_bufs.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_cache.c
drm_client.c drm/gem: Add drm_gem_object_funcs 2018-11-20 14:56:18 +01:00
drm_color_mgmt.c drm: Constify drm_color_lut_check() 2019-01-29 23:26:12 +02:00
drm_connector.c drm/dp: Set the connector's TILE property even for DP SST connectors 2019-03-14 11:33:17 -07:00
drm_context.c drm: Fix error handling in drm_legacy_addctx 2019-01-07 11:26:31 +01:00
drm_crtc_helper_internal.h
drm_crtc_helper.c drm: Remove use of drm_mode_object 2019-01-15 13:20:56 +01:00
drm_crtc_internal.h drm: Unexport drm_crtc_force_disable 2019-01-11 15:56:40 +01:00
drm_crtc.c drm: Move the legacy kms disable_all helper to crtc helpers 2019-01-11 22:54:29 +01:00
drm_damage_helper.c drm: prepare for drmP.h removal from drm_modeset_helper.h 2019-02-07 21:48:28 +01:00
drm_debugfs_crc.c Revert "drm: crc: Wait for a frame before returning from open()" 2018-08-22 09:50:16 -07:00
drm_debugfs.c drm: Merge drm_info.c into drm_debugfs.c 2018-11-22 09:52:27 +01:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_cec.c drm: Do not call drm_dp_cec_set_edid() while registering DP connectors 2018-10-11 10:52:35 +02:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm/dsc: Add kernel documentation for DRM DP DSC helpers 2019-02-08 13:38:51 -08:00
drm_dp_mst_topology.c drm/dp: Set the connector's TILE property even for DP SST connectors 2019-03-14 11:33:17 -07:00
drm_drv.c drm/drv: DOC: Add driver example code 2019-03-04 15:23:34 +01:00
drm_dsc.c drm/dsc: Split DSC PPS and SDP header initialisations 2019-03-05 13:24:34 -05:00
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c drm/edid: Remove defunct EDID_QUIRK_FIRST_DETAILED_PREFERRED 2019-03-27 13:55:13 +02:00
drm_encoder_slave.c
drm_encoder.c drm: Differentiate the lack of an interface from invalid parameter 2018-09-14 17:29:47 +01:00
drm_fb_cma_helper.c drm/cma-helper: Remove unused fbdev code 2019-01-17 10:56:38 +01:00
drm_fb_helper.c drm/fb-helper: Fixup fill_info cleanup 2019-03-27 19:39:03 +01:00
drm_file.c Merge drm/drm-next into drm-misc-next 2019-03-06 09:22:18 -05:00
drm_flip_work.c drm: move drm_can_sleep() to drm_util.h 2019-01-14 10:58:37 +01:00
drm_fourcc.c drm/fourcc: Fix conflicting Y41x definitions 2019-03-21 09:49:04 +01:00
drm_framebuffer.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_gem_cma_helper.c drm/cma-helper: Add DRM_GEM_CMA_VMAP_DRIVER_OPS 2018-11-20 14:57:25 +01:00
drm_gem_framebuffer_helper.c drm/gem-fb-helper: Add drm_gem_fb_create_with_dirty() 2019-01-17 10:56:45 +01:00
drm_gem_shmem_helper.c drm: Add library for shmem backed GEM objects 2019-03-14 12:06:44 -07:00
drm_gem.c Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
drm_hashtab.c
drm_internal.h drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_ioc32.c drm: add __user attribute to ptr_to_compat() 2019-03-04 09:55:31 -05:00
drm_ioctl.c drm: allow render capable master with DRM_AUTH ioctls 2019-02-13 17:42:36 +00:00
drm_irq.c drm/irq: Ditch DRIVER_IRQ_SHARED 2019-01-29 15:45:21 +01:00
drm_kms_helper_common.c drm: fix spelling mistake "intead" -> "instead" 2019-03-04 11:18:50 -05:00
drm_lease.c Linux 5.0-rc7 2019-02-18 13:27:15 +10:00
drm_legacy.h
drm_lock.c drm: Differentiate the lack of an interface from invalid parameter 2018-09-14 17:29:47 +01:00
drm_memory.c drm: change func to better detect wether swiotlb is needed 2019-02-20 13:29:29 +01:00
drm_mipi_dsi.c
drm_mm.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_mode_config.c drm-misc-next for 5.1: 2019-01-10 05:58:52 +10:00
drm_mode_object.c gpu/drm: Fix lock held when returning to user space. 2019-01-10 11:31:58 +01:00
drm_modes.c drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags 2019-03-18 11:42:13 +02:00
drm_modeset_helper.c drm: prepare for drmP.h removal from drm_modeset_helper.h 2019-02-07 21:48:28 +01:00
drm_modeset_lock.c drm/atomic: integrate modeset lock with private objects 2018-12-11 15:24:30 +01:00
drm_of.c drm/of: Fix kerneldoc 2019-01-12 13:07:58 +01:00
drm_panel_orientation_quirks.c drm: panel-orientation-quirks: Add quirk for Lenovo Ideapad D330 2019-03-01 09:15:55 +02:00
drm_panel.c drm/panel: Small documentation polish 2019-01-12 13:08:12 +01:00
drm_pci.c cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
drm_plane_helper.c drm: Unexport drm_plane_helper_check_update 2018-10-05 22:45:19 +02:00
drm_plane.c drm: Auto-set allow_fb_modifiers when given modifiers at plane init 2019-01-11 16:53:55 +01:00
drm_prime.c drm: Add reservation_object to drm_gem_object 2019-02-19 11:08:40 +01:00
drm_print.c
drm_probe_helper.c drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
drm_property.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_rect.c drm: Nuke drm_calc_{h,v}scale_relaxed() 2019-02-07 13:14:06 +02:00
drm_scatter.c drm: Differentiate the lack of an interface from invalid parameter 2018-09-14 17:29:47 +01:00
drm_scdc_helper.c
drm_simple_kms_helper.c drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
drm_syncobj.c drm: export drm_timeout_abs_to_jiffies 2019-03-07 12:00:30 -06:00
drm_sysfs.c drm/lease: Send a distinct uevent 2018-11-30 10:57:18 +01:00
drm_trace_points.c
drm_trace.h
drm_vblank.c drm: Trivial comment grammar cleanups 2019-02-04 10:21:17 +01:00
drm_vm.c drm/drm_vm: Mark expected switch fall-throughs 2019-02-19 12:20:41 +01:00
drm_vma_manager.c drm: Remove "protection" around drm_vma_offset_manager_destroy() 2018-09-04 19:00:32 +01:00
drm_writeback.c drm: writeback: Add job prepare and cleanup operations 2019-03-18 17:24:38 +02:00
Kconfig Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00
Makefile Merge branch 'drm-next-5.2' of git://people.freedesktop.org/~agd5f/linux into drm-next 2019-04-03 13:26:11 +10:00