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linux/drivers/gpu/drm/i915
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Ville Syrjälä bc9db5ad32 drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT 
My heuristic for detecting type 1 DVI DP++ adaptors based on the VBT
port information apparently didn't survive the reality of buggy VBTs.
In this particular case we have a machine with a natice HDMI port, but
the VBT tells us it's a DP++ port based on its capabilities.

The dvo_port information in VBT does claim that we're dealing with a
HDMI port though, but we have other machines which do the same even
when they actually have DP++ ports. So that piece of information alone
isn't sufficient to tell the two apart.

After staring at a bunch of VBTs from various machines, I have to
conclude that the only other semi-reliable clue we can use is the
presence of the AUX channel in the VBT. On this particular machine
AUX channel is specified as zero, whereas on some of the other machines
which listed the DP++ port as HDMI have a non-zero AUX channel.

I've also seen VBTs which have dvo_port a DP but have a zero AUX
channel. I believe those we need to treat as DP ports, so we'll limit
the AUX channel check to just the cases where dvo_port is HDMI.

If we encounter any more serious failures with this heuristic I think
we'll have to have to throw it out entirely. But that could mean that
there is a risk of type 1 DVI dongle users getting greeted by a
black screen, so I'd rather not go there unless absolutely necessary.

v2: Remove the duplicate PORT_A check (Daniel)
    Fix some typos in the commit message

Cc: Daniel Otero <daniel.otero@outlook.com>
Cc: stable@vger.kernel.org
Tested-by: Daniel Otero <daniel.otero@outlook.com>
Fixes: d61992565b ("drm/i915: Determine DP++ type 1 DVI adaptor presence based on VBT")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97994
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1478884464-14251-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 7a17995a3d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-11-16 10:06:14 +02:00
..
gvt
dvo_ch7xxx.c
dvo_ch7017.c
dvo_ivch.c
dvo_ns2501.c
dvo_sil164.c
dvo_tfp410.c
dvo.h
i915_cmd_parser.c drm/i915: use NULL for NULL pointers 2016-09-16 10:35:43 +03:00
i915_debugfs.c Merge tag 'drm-intel-next-2016-09-19' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-09-20 06:23:22 +10:00
i915_drv.c drm/i915: Fix mismatched INIT power domain disabling during suspend 2016-10-28 15:19:43 +03:00
i915_drv.h drm/i915: keep declarations in i915_drv.h 2016-10-28 15:17:12 +03:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Update reset path to fix incomplete requests 2016-09-09 14:23:05 +01:00
i915_gem_dmabuf.c drm/prime: Take a ref on the drm_dev when exporting a dma_buf 2016-10-05 15:30:32 +02:00
i915_gem_dmabuf.h
i915_gem_evict.c drm/i915: Mark up all locked waiters 2016-09-09 14:23:03 +01:00
i915_gem_execbuffer.c drm/i915: Mark CPU cache as dirty when used for rendering 2016-11-11 10:04:30 +02:00
i915_gem_fence.c drm/i915: Use fence_write() from rpm resume 2016-10-28 15:18:51 +03:00
i915_gem_gtt.c drm/i915: remove writeq ifdeffery 2016-09-12 11:33:56 +03:00
i915_gem_gtt.h drm/i915: Embed the scratch page struct into each VM 2016-08-22 12:19:52 +01:00
i915_gem_render_state.c drm/i915: Use VMA for render state page tracking 2016-08-15 11:01:11 +01:00
i915_gem_render_state.h drm/i915: Use VMA for render state page tracking 2016-08-15 11:01:11 +01:00
i915_gem_request.c drm/i915: Distinguish last emitted request from last submitted request 2016-10-10 16:06:43 +03:00
i915_gem_request.h drm/i915: Nonblocking request submission 2016-09-09 14:23:08 +01:00
i915_gem_shrinker.c drm/i915: Mark up all locked waiters 2016-09-09 14:23:03 +01:00
i915_gem_stolen.c drm/i915: pdev cleanup 2016-08-22 12:19:52 +01:00
i915_gem_tiling.c drm/i915: Move fence tracking from object to vma 2016-08-18 22:36:50 +01:00
i915_gem_userptr.c mm: replace get_user_pages_remote() write/force parameters with gup_flags 2016-10-19 08:12:02 -07:00
i915_gem.c drm/i915: Limit Valleyview and earlier to only using mappable scanout 2016-11-07 19:02:35 +02:00
i915_gem.h
i915_gpu_error.c drm/i915: Make HWS_NEEDS_PHYSICAL the exception 2016-09-07 16:07:09 -07:00
i915_guc_reg.h drm/i915/guc: general tidying up (loader) 2016-09-15 10:56:02 +01:00
i915_guc_submission.c drm/i915/guc: Unwind GuC workqueue reservation if request construction fails 2016-10-10 16:06:44 +03:00
i915_ioc32.c
i915_irq.c drm/i915: Use correct index for backtracking HUNG semaphores 2016-10-10 16:06:42 +03:00
i915_memcpy.c drm/i915: Mark the static key for movntqda as static 2016-08-17 12:36:07 +01:00
i915_mm.c drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass 2016-08-19 17:13:36 +01:00
i915_params.c drm/i915: Add a way to test the modeset done during gpu reset, v3. 2016-08-05 23:28:28 +03:00
i915_params.h drm/i915: Add a way to test the modeset done during gpu reset, v3. 2016-08-05 23:28:28 +03:00
i915_pci.c drm/i915: keep declarations in i915_drv.h 2016-10-28 15:17:12 +03:00
i915_pvinfo.h
i915_reg.h drm/i915: clarify PMINTRMSK/pm_intr_keep usage 2016-09-15 10:55:43 +01:00
i915_suspend.c drm/i915: pdev cleanup 2016-08-22 12:19:52 +01:00
i915_sw_fence.c drm/i915: Add a sw fence for collecting up dma fences 2016-09-09 14:22:55 +01:00
i915_sw_fence.h drm/i915: Add a sw fence for collecting up dma fences 2016-09-09 14:22:55 +01:00
i915_sysfs.c drm/i915: Drop mutex around clearing error state 2016-09-02 08:32:55 +01:00
i915_trace_points.c
i915_trace.h
i915_vgpu.c Merge tag 'drm-intel-next-2016-09-19' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-09-20 06:23:22 +10:00
i915_vgpu.h
intel_acpi.c
intel_atomic_plane.c drm: remove const attribute to hint at caller that they now own the memory 2016-08-16 14:06:53 +02:00
intel_atomic.c
intel_audio.c Merge tag 'drm-intel-next-2016-09-19' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-09-20 06:23:22 +10:00
intel_bios.c drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT 2016-11-16 10:06:14 +02:00
intel_bios.h
intel_breadcrumbs.c drm/i915: Reset the breadcrumbs IRQ more carefully 2016-10-10 16:06:44 +03:00
intel_color.c drm/i915: Use more atomic state in intel_color.c 2016-08-23 11:58:56 +02:00
intel_crt.c drm/i915: Cleanup crt disable sequence on hsw+ 2016-08-24 09:49:10 +02:00
intel_csr.c drm/i915: Fix botched merge that downgrades CSR versions. 2016-08-22 16:08:32 +03:00
intel_ddi.c drm/i915: Add support for Kabylake to function obtaining shared PLL 2016-09-12 22:06:08 -07:00
intel_device_info.c drm/i915: workaround sparse warning on variable length arrays 2016-10-28 15:17:50 +03:00
intel_display.c drm/i915/dp: Extend BDW DP audio workaround to GEN9 platforms 2016-11-07 18:23:54 +02:00
intel_dp_aux_backlight.c
intel_dp_link_training.c drm/i915: Make DP link training channel equalization DP 1.2 Spec compliant 2016-09-09 14:53:18 -07:00
intel_dp_mst.c drm/i915: Remove ddi_pll_sel from intel_crtc_state 2016-09-07 13:55:33 -07:00
intel_dp.c drm/i915: Refresh that status of MST capable connectors in ->detect() 2016-11-11 10:19:45 +02:00
intel_dpio_phy.c
intel_dpll_mgr.c drm/i915/bxt: Fix HDMI DPLL configuration 2016-10-10 16:06:39 +03:00
intel_dpll_mgr.h drm/i915/dp: Add a standalone function to obtain shared dpll for HSW/BDW/SKL/BXT 2016-09-09 14:53:18 -07:00
intel_drv.h drm/i915: SAGV is not SKL-only, so rename a few things 2016-10-10 16:06:36 +03:00
intel_dsi_dcs_backlight.c
intel_dsi_panel_vbt.c
intel_dsi_pll.c
intel_dsi.c drm/i915: Convert intel_dsi to use atomic state 2016-08-23 11:21:39 +02:00
intel_dsi.h
intel_dvo.c drm/i915/dvo: Remove dangling call to drm_encoder_cleanup() 2016-08-29 12:28:09 +03:00
intel_engine_cs.c drm/i915: Reset the breadcrumbs IRQ more carefully 2016-10-10 16:06:44 +03:00
intel_fbc.c drm/i915/fbc: fix CFB size calculation for gen8+ 2016-10-28 15:23:52 +03:00
intel_fbdev.c drm/i915: pdev cleanup 2016-08-22 12:19:52 +01:00
intel_fifo_underrun.c
intel_frontbuffer.c
intel_frontbuffer.h
intel_guc_fwif.h drm/doc: Fix more kerneldoc/sphinx warnings 2016-08-16 16:09:58 +02:00
intel_guc_loader.c drm/i915/guc: general tidying up (loader) 2016-09-15 10:56:02 +01:00
intel_guc.h drm/i915/guc: Unwind GuC workqueue reservation if request construction fails 2016-10-10 16:06:44 +03:00
intel_gvt.c
intel_gvt.h
intel_hdmi.c drm/i915: Respect alternate_ddc_pin for all DDI ports 2016-11-07 18:22:06 +02:00
intel_hotplug.c drm/i915: Mark i915_hpd_poll_init_work as static 2016-08-17 12:36:15 +01:00
intel_i2c.c drm/i915: Take forcewake once for the entire GMBUS transaction 2016-08-22 18:42:44 +01:00
intel_lrc.c drm/i915/guc: Unwind GuC workqueue reservation if request construction fails 2016-10-10 16:06:44 +03:00
intel_lrc.h drm/i915: Update reset path to fix incomplete requests 2016-09-09 14:23:05 +01:00
intel_lvds.c Merge tag 'drm-intel-next-2016-09-19' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-09-20 06:23:22 +10:00
intel_mocs.c
intel_mocs.h
intel_modes.c drm: Remove superflous linux/fb.h includes 2016-08-12 10:41:39 +02:00
intel_opregion.c drm/i915: Ignore OpRegion panel type except on select machines 2016-09-14 11:25:05 +03:00
intel_overlay.c drm/i915: Embed the io-mapping struct inside drm_i915_private 2016-08-19 17:13:35 +01:00
intel_panel.c drm/i915/backlight: setup backlight pwm alternate increment on backlight enable 2016-10-10 16:05:52 +03:00
intel_pm.c drm/i915/gen9: fix watermarks when using the pipe scaler 2016-10-28 15:20:15 +03:00
intel_psr.c Revert "drm/i915/psr: Make idle_frames sensible again" 2016-09-14 11:24:58 +03:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c drm/i915: Reset the breadcrumbs IRQ more carefully 2016-10-10 16:06:44 +03:00
intel_ringbuffer.h drm/i915: Reset the breadcrumbs IRQ more carefully 2016-10-10 16:06:44 +03:00
intel_runtime_pm.c drm/i915/vlv: Prevent enabling hpd polling in late suspend 2016-11-07 18:22:46 +02:00
intel_sdvo_regs.h
intel_sdvo.c drm/i915: Convert intel_sdvo to use atomic state 2016-08-23 11:21:51 +02:00
intel_sideband.c
intel_sprite.c drm/i915: Grab the rotation from the passed plane state for VLV sprites 2016-11-11 10:04:41 +02:00
intel_tv.c drm/i915: Make encoder->compute_config take the connector state 2016-08-23 11:07:23 +02:00
intel_uncore.c drm/i915: Just clear the mmiodebug before a register access 2016-10-10 16:06:41 +03:00
intel_vbt_defs.h drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT 2016-11-16 10:06:14 +02:00
Kconfig
Kconfig.debug
Makefile drm/i915: Add a sw fence for collecting up dma fences 2016-09-09 14:22:55 +01:00