kernel/drivers/gpu/drm/i915, branch linux-5.1.y

drm/i915/ringbuffer: EMIT_INVALIDATE before switch context

2019-07-10T07:52:30Z

commit c84c9029d782a3a0d2a7f0522ecb907314d43e2c upstream. Despite what I think the prm recommends, commit f2253bd9859b ("drm/i915/ringbuffer: EMIT_INVALIDATE after switch context") turned out to be a huge mistake when enabling Ironlake contexts as the GPU would hang on either a MI_FLUSH or PIPE_CONTROL immediately following the MI_SET_CONTEXT of an active mesa context (more vanilla contexts, e.g. simple rendercopies with igt, do not suffer). Ville found the following clue, "[DevCTG+]: For the invalidate operation of the pipe control, the following pointers are affected. The invalidate operation affects the restore of these packets. If the pipe control invalidate operation is completed before the context save, the indirect pointers will not be restored from memory. 1. Pipeline State Pointer 2. Media State Pointer 3. Constant Buffer Packet" which suggests by us emitting the INVALIDATE prior to the MI_SET_CONTEXT, we prevent the context-restore from chasing the dangling pointers within the image, and explains why this likely prevents the GPU hang. Signed-off-by: Chris Wilson Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190419111749.3910-1-chris@chris-wilson.co.uk (cherry picked from commit 928f8f42310f244501a7c70daac82c196112c190 in drm-intel-next) Cc: stable@vger.kernel.org Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111014 Fixes: f2253bd9859b ("drm/i915/ringbuffer: EMIT_INVALIDATE after switch context") Signed-off-by: Daniel Vetter Signed-off-by: Greg Kroah-Hartman

drm/i915: Skip modeset for cdclk changes if possible

2019-07-03T11:13:37Z

commit 59f9e9cab3a1e6762fb707d0d829b982930f1349 upstream. If we have only a single active pipe and the cdclk change only requires the cd2x divider to be updated bxt+ can do the update with forcing a full modeset on the pipe. Try to hook that up. v2: - Wait for vblank after an optimized CDCLK change. - Avoid optimization if the pipe needs a modeset (or was disabled). - Split CDCLK change to a pre/post plane update step. v3: - Use correct version of CDCLK state as old state. (Ville) - Remove unused intel_cdclk_can_skip_modeset() v4: - For consistency call intel_set_cdclk_post_plane_update() only during modesets (and not fastsets). v5: - Remove the logic to update the CD2X divider on-the-fly on ICL, since only a divider of 1 is supported there. Clint also noticed that the pipe select bits in CDCLK_CTL are oddly defined on ICL, it's not clear yet whether that's only an error in the specification. Signed-off-by: Ville Syrjälä Signed-off-by: Abhay Kumar Tested-by: Abhay Kumar Signed-off-by: Imre Deak Reviewed-by: Clint Taylor Link: https://patchwork.freedesktop.org/patch/msgid/20190327101321.3095-1-imre.deak@intel.com Signed-off-by: Jian-Hong Pan Signed-off-by: Greg Kroah-Hartman

drm/i915: Remove redundant store of logical CDCLK state

2019-07-03T11:13:37Z

commit 2b21dfbeee725778daed2c3dd45a3fc808176feb upstream. We copied the original state into the atomic state already earlier in the function, so no need to do it a second time. Cc: Ville Syrjälä Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190320135439.12201-3-imre.deak@intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Jian-Hong Pan

drm/i915: Save the old CDCLK atomic state

2019-07-03T11:13:37Z

commit 48d9f87ddd2108663fd866b254e05d422243cc56 upstream. The old state will be needed by an upcoming patch to determine if the commit increases or decreases CDCLK, so move the old state to the atomic state (while keeping the new one in dev_priv). cdclk.logical and cdclk.actual in the atomic state isn't used atm anywhere after the atomic check phase, so this should be safe. v2: - Use swap() instead of opencoding it. (Ville) Suggested-by: Ville Syrjälä Cc: Ville Syrjälä Signed-off-by: Imre Deak Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190320135439.12201-2-imre.deak@intel.com Signed-off-by: Jian-Hong Pan Signed-off-by: Greg Kroah-Hartman

drm/i915: Force 2*96 MHz cdclk on glk/cnl when audio power is enabled

2019-07-03T11:13:36Z

commit 905801fe72377b4dc53c6e13eea1a91c6a4aa0c4 upstream. CDCLK has to be at least twice the BLCK regardless of audio. Audio driver has to probe using this hook and increase the clock even in absence of any display. v2: Use atomic refcount for get_power, put_power so that we can call each once(Abhay). v3: Reset power well 2 to avoid any transaction on iDisp link during cdclk change(Abhay). v4: Remove Power well 2 reset workaround(Ville). v5: Remove unwanted Power well 2 register defined in v4(Abhay). v6: - Use a dedicated flag instead of state->modeset for min CDCLK changes - Make get/put audio power domain symmetric - Rebased on top of intel_wakeref tracking changes. Signed-off-by: Ville Syrjälä Signed-off-by: Abhay Kumar Tested-by: Abhay Kumar Signed-off-by: Imre Deak Reviewed-by: Clint Taylor Link: https://patchwork.freedesktop.org/patch/msgid/20190320135439.12201-1-imre.deak@intel.com Cc: # 5.1.x Signed-off-by: Jian-Hong Pan Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=203623 Buglink: https://bugs.freedesktop.org/show_bug.cgi?id=110916 Link: https://www.spinics.net/lists/stable/msg310910.html Signed-off-by: Greg Kroah-Hartman

drm/i915: Don't clobber M/N values during fastset check

2019-06-25T03:34:54Z

commit 475df5d0f3eb2d031e4505f84d8fba75baaf2e80 upstream. We're now calling intel_pipe_config_compare(..., true) uncoditionally which means we're always going clobber the calculated M/N values with the old values if the fuzzy M/N check passes. That causes problems because the fuzzy check allows for a huge difference in the values. I'm actually tempted to just make the M/N checks exact, but that might prevent fastboot from kicking in when people want it. So for now let's overwrite the computed values with the old values only if decide to skip the modeset. v2: Copy has_drrs along with M/N M2/N2 values Cc: stable@vger.kernel.org Cc: Blubberbub@protonmail.com Cc: Maarten Lankhorst Cc: Hans de Goede Tested-by: Blubberbub@protonmail.com Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110782 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110675 Fixes: d19f958db23c ("drm/i915: Enable fastset for non-boot modesets.") Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190612172423.25231-1-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak (cherry picked from commit f0521558a2a89d58a08745e225025d338572e60a) Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20190619120929.4057-1-ville.syrjala@linux.intel.com Signed-off-by: Greg Kroah-Hartman

drm/i915/dmc: protect against reading random memory

2019-06-19T06:00:05Z

commit 326fb6dd1483c985a6ef47db3fa8788bb99e8b83 upstream. While loading the DMC firmware we were double checking the headers made sense, but in no place we checked that we were actually reading memory we were supposed to. This could be wrong in case the firmware file is truncated or malformed. Before this patch: # ls -l /lib/firmware/i915/icl_dmc_ver1_07.bin -rw-r--r-- 1 root root 25716 Feb 1 12:26 icl_dmc_ver1_07.bin # truncate -s 25700 /lib/firmware/i915/icl_dmc_ver1_07.bin # modprobe i915 # dmesg| grep -i dmc [drm:intel_csr_ucode_init [i915]] Loading i915/icl_dmc_ver1_07.bin [drm] Finished loading DMC firmware i915/icl_dmc_ver1_07.bin (v1.7) i.e. it loads random data. Now it fails like below: [drm:intel_csr_ucode_init [i915]] Loading i915/icl_dmc_ver1_07.bin [drm:csr_load_work_fn [i915]] *ERROR* Truncated DMC firmware, rejecting. i915 0000:00:02.0: Failed to load DMC firmware i915/icl_dmc_ver1_07.bin. Disabling runtime power management. i915 0000:00:02.0: DMC firmware homepage: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/i915 Before reading any part of the firmware file, validate the input first. Fixes: eb805623d8b1 ("drm/i915/skl: Add support to load SKL CSR firmware.") Cc: stable@vger.kernel.org Signed-off-by: Lucas De Marchi Reviewed-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20190605235535.17791-1-lucas.demarchi@intel.com (cherry picked from commit bc7b488b1d1c71dc4c5182206911127bc6c410d6) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

drm/i915: Fix per-pixel alpha with CCS

2019-06-19T06:00:05Z

commit 77ce94dbe586c1a6a26cf021c08109c9ce71b3e0 upstream. We forgot to set .has_alpha=true for the A+CCS formats when the code started to consult .has_alpha. This manifests as A+CCS being treated as X+CCS which means no per-pixel alpha blending. Fix the format list appropriately. Cc: stable@vger.kernel.org Cc: Maarten Lankhorst Cc: Matt Roper Cc: Heinrich Fink Reported-by: Heinrich Fink Tested-by: Heinrich Fink Fixes: b20815255693 ("drm/i915: Add plane alpha blending support, v2.") Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190603142500.25680-1-ville.syrjala@linux.intel.com Reviewed-by: Maarten Lankhorst (cherry picked from commit 38f300410f3e15b6fec76c8d8baed7111b5ea4e4) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

drm/i915/dsi: Use a fuzzy check for burst mode clock check

2019-06-19T06:00:05Z

commit f9a99131ce18d9dddcaa14ec2c436e42f0bbee5e upstream. Prior to this commit we fail to init the DSI panel on the GPD MicroPC: https://www.indiegogo.com/projects/gpd-micropc-6-inch-handheld-industry-laptop#/ The problem is intel_dsi_vbt_init() failing with the following error: *ERROR* Burst mode freq is less than computed The pclk in the VBT panel modeline is 70000, together with 24 bpp and 4 lines this results in a bitrate value of 70000 * 24 / 4 = 420000. But the target_burst_mode_freq in the VBT is 418000. This commit works around this problem by adding an intel_fuzzy_clock_check when target_burst_mode_freq < bitrate and setting target_burst_mode_freq to bitrate when that checks succeeds, fixing the panel not working. Cc: stable@vger.kernel.org Reviewed-by: Ville Syrjälä Signed-off-by: Hans de Goede Link: https://patchwork.freedesktop.org/patch/msgid/20190524174028.21659-2-hdegoede@redhat.com (cherry picked from commit 2c1c55252647abd989b94f725b190c700312d053) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

drm/i915/sdvo: Implement proper HDMI audio support for SDVO

2019-06-19T06:00:04Z

commit d74408f528261f900dddb9778f61b5c5a7a6249c upstream. Our SDVO audio support is pretty bogus. We can't push audio over the SDVO bus, so trying to enable audio in the SDVO control register doesn't do anything. In fact it looks like the SDVO encoder will always mix in the audio coming over HDA, and there's no (at least documented) way to disable that from our side. So HDMI audio does work currently on gen4 but only by luck really. On gen3 it got broken by the referenced commit. And what has always been missing on every platform is the ELD. To pass the ELD to the audio driver we need to write it to magic buffer in the SDVO encoder hardware which then gets pulled out via HDA in the other end. Ie. pretty much the same thing we had for native HDMI before we started to just pass the ELD between the drivers. This sort of explains why we even have that silly hardware buffer with native HDMI. $ cat /proc/asound/card0/eld#1.0 -monitor_present 0 -eld_valid 0 +monitor_present 1 +eld_valid 1 +monitor_name LG TV +connection_type HDMI +... This also fixes our state readout since we can now query the SDVO encoder about the state of the "ELD valid" and "presence detect" bits. As mentioned those don't actually control whether audio gets sent over the HDMI cable, but it's the best we can do. And with the state checker appeased we can re-enable HDMI audio for gen3. Cc: stable@vger.kernel.org Cc: Daniel Vetter Cc: zardam@gmail.com Tested-by: zardam@gmail.com Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108976 Fixes: de44e256b92c ("drm/i915/sdvo: Shut up state checker with hdmi cards on gen3") Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190409144054.24561-3-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak (cherry picked from commit dc49a56bd43bb04982e64b44436831da801d0237) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman

kernel/drivers/gpu/drm/i915, branch linux-5.1.y

drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context

drm/i915: Skip modeset for cdclk changes if possible

drm/i915: Remove redundant store of logical CDCLK state

drm/i915: Save the old CDCLK atomic state

drm/i915: Force 2*96 MHz cdclk on glk/cnl when audio power is enabled

drm/i915: Don't clobber M/N values during fastset check

drm/i915/dmc: protect against reading random memory

drm/i915: Fix per-pixel alpha with CCS

drm/i915/dsi: Use a fuzzy check for burst mode clock check

drm/i915/sdvo: Implement proper HDMI audio support for SDVO

drm/i915/ringbuffer: EMIT_INVALIDATE before switch context