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2017-06-16drm/nouveau/tmr: remove nvkm_timer_alarm_cancel()Ben Skeggs6-15/+5
nvkm_timer_alarm() already handles this as part of protecting against callers passing in no timeout value. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/bios/iccsense: rails for power sensors have a mask of 0xf8 for version 0x10Karol Herbst1-1/+4
I only saw those values inside the vbios: 0xff, 0xfd, 0xfc, 0xfa for valid rails. No idea what the lower value does, but at least we get power readings on a lot of Fermi GPUs with that. v2: add missing parentheses Signed-off-by: Karol Herbst <karolherbst@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/bios/volt: Parse min and max for Version 0x40Karol Herbst1-3/+3
This is according to what we have in nvbios. Fixes "ERROR: Can't get value of subfeature in0_min: Can't read" errors in sensors for some GPUs. Signed-off-by: Karol Herbst <karolherbst@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau: Enable stereoscopic 3D output over HDMIAlastair Bridgewater1-0/+7
Enable stereoscopic output for HDMI and DisplayPort connectors on NV50+ (G80+) hardware. We do not enable stereoscopy on older hardware in case there is some older board that still has HDMI output but for which we have no logic for setting the Vendor InfoFrame. With this, I get an obvious 3D output when using the "testdisplay" program from intel-gpu-tools with the "-3" parameter and outputting to a 3D-capable HDMI display, for all available 3D modes (be they TB, SBSH, or FP) on all four G80+ DISPs. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com>
2017-06-16drm/nouveau: Handle frame-packing mode geometry and timing effectsAlastair Bridgewater2-7/+17
Frame-packing modes add an extra vtotal raster lines to each frame above and beyond what the basic mode description calls for. Account for this during scaler configuration (possibly a bit of a hack), during CRTC configuration (clearly not a hack), and when checking that a mode is valid for a given connector (cribbed from the i915 driver). Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp/gk104-: Use supplied HDMI InfoFramesAlastair Bridgewater1-6/+30
Now that we have the InfoFrame data being provided, for the most part, program the hardware to use it. While we're here, and since the functionality will come in handy for supporting 3D stereoscopy, implement setting the Vendor ("generic"?) InfoFrame. Also don't enable any InfoFrame that is not provided, and disable the Vendor InfoFrame when disabling the output. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp/gf119: Use supplied HDMI InfoFramesAlastair Bridgewater1-6/+34
Now that we have the InfoFrame data being provided, for the most part, program the hardware to use it. While we're here, and since the functionality will come in handy for supporting 3D stereoscopy, implement setting the Vendor ("generic"?) InfoFrame. Also don't enable any InfoFrame that is not provided, and disable the Vendor InfoFrame when disabling the output. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp/gt215: Use supplied HDMI InfoFramesAlastair Bridgewater1-6/+31
Now that we have the InfoFrame data being provided, for the most part, program the hardware to use it. While we're here, and since the functionality will come in handy for supporting 3D stereoscopy, implement setting the Vendor ("generic") InfoFrame. Also don't enable any AVI or Vendor InfoFrame that is not provided, and disable the Vendor InfoFrame when disabling the output. Ignore the Audio InfoFrame: We don't supply it, and altering HDMI audio semantics (for better or worse) on this hardware is out of scope for me at this time. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp/g84-gt200: Use supplied HDMI InfoFramesAlastair Bridgewater1-6/+31
Now that we have the InfoFrame data being provided, for the most part, program the hardware to use it. While we're here, and since the functionality will come in handy for supporting 3D stereoscopy, implement setting the Vendor ("generic"?) InfoFrame. Also don't enable any AVI or Vendor InfoFrame that is not provided, and disable the Vendor InfoFrame when disabling the output. Ignore the Audio InfoFrame: We don't supply it, and altering HDMI audio semantics (for better or worse) on this hardware is out of scope for me at this time. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp: Add mechanism to convert HDMI InfoFrames to hardware formatAlastair Bridgewater3-0/+78
HDMI InfoFrames are passed to NVKM as bags of bytes, but the hardware needs them to be packed into words. Rather than having four (or more) copies of the packing logic introduce a single copy now, in a central place. We currently need these for AVI and Vendor InfoFrames, but we may also expect to need them for Audio InfoFrames at some point. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau: Pass mode-dependent AVI and Vendor HDMI InfoFrames to NVKMAlastair Bridgewater1-1/+29
Now that we have mechanism by which to pass mode-dependent HDMI InfoFrames to the low-level hardware driver, it is incumbent upon us to do so. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau/disp/g84-: Extend NVKM HDMI power control method to set InfoFramesAlastair Bridgewater5-5/+35
The nouveau driver, in the Linux 3.7 days, used to try and set the AVI InfoFrame based on the selected display mode. These days, it uses a fixed set of InfoFrames. Start to correct that, by providing a mechanism whereby InfoFrame data may be passed to the NVKM functions that do the actual configuration. At this point, only establish the new parameters and their parsing, don't actually use the data anywhere yet (since it's not supplied anywhere). Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-16drm/nouveau: Clean up nv50_head_atomic_check_mode() and fix blankus calculationAlastair Bridgewater1-21/+23
drm_mode_set_crtcinfo() does compensation for interlace and doublescan timing effects already, so do it first and use the compensated figures instead of the constant "vscan / ilace" terms that we had before. And then it turns out that the hardware model for how the timing parameters are configured is basically the standard model, but starting one clock before the sync pulse rather than at the start of the display area, which lets us drastically simplify the overall timing calculations (verifying the changes by algebraic operations is left as an exercise for the reader). Finally, there were a couple of issues with the computation of m->v.blankus that are addressed here. Interlaced modes would generate a negative intermediate result. Double scan modes would generate an overestimate rather than an underestimate. And when enabling frame-packing modes, a rather extreme overestimate would be generated. Fixed, by using the timings as adjusted for the CRTC to find the length of the vertical blanking period instead of mixing adjusted and pre-adjustment timing parameters. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-06-15drm: Reduce scope of 'state' variableDawid Kurek1-1/+2
Smaller scope reduces visibility of variable and makes usage of uninitialized variable less possible. Changes in v2: - separate declaration and initialization Changes in v3: - add missing signed-off-by tag Signed-off-by: Dawid Kurek <dawikur@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/20170615174556.GA8872@gmail.com
2017-06-15drm: mxsfb_crtc: Reset the eLCDIF controllerFabio Estevam1-0/+42
According to the eLCDIF initialization steps listed in the MX6SX Reference Manual the eLCDIF block reset is mandatory. Without performing the eLCDIF reset the display shows garbage content when the kernel boots. In earlier tests this issue has not been observed because the bootloader was previously showing a splash screen and the bootloader display driver does properly implement the eLCDIF reset. Add the eLCDIF reset to the driver, so that it can operate correctly independently of the bootloader. Tested on a imx6sx-sdb board. Cc: <stable@vger.kernel.org> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Marek Vasut <marex@denx.de> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1494007301-14535-1-git-send-email-fabio.estevam@nxp.com
2017-06-15drm/amdgpu: Fix compiler warningsHarish Kasiviswanathan1-4/+4
Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: vm_update_ptes remove code duplicationHarish Kasiviswanathan1-57/+16
CPU and GPU paths were mostly the same. Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port VCN over to new SOC15 macrosTom St Denis1-82/+82
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port PSP v10.0 over to new SOC15 macrosTom St Denis1-7/+7
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port PSP v3.1 over to new SOC15 macrosTom St Denis1-16/+16
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port NBIO v7.0 driver over to new SOC15 macrosTom St Denis1-25/+17
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port NBIO v6.1 driver over to new SOC15 macrosTom St Denis1-31/+23
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port UVD 7.0 over to new SOC15 macrosTom St Denis1-87/+87
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port MMHUB over to new SOC15 macrosTom St Denis1-14/+11
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Cleanup gfxhub read-modify-write patternsTom St Denis1-8/+3
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Port GFXHUB over to new SOC15 macrosTom St Denis1-14/+12
Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Add offset variant to SOC15 macrosTom St Denis1-0/+14
Allows reading/writing via SOC15 macros with offset for various register banks. Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/powerplay: add avfs control for Vega10Eric Huang1-0/+1
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: add virtual display support for ravenAlex Deucher1-0/+2
Same as other asics. If enabled, exposes a user selectable number of virtual displays. Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu/gfx9: fix compute ring doorbell indexAlex Deucher1-1/+1
This got lost when the code was revamped. Copy/paste bug from gfx8. Reported-by: Evan Quan <evan.quan@amd.com> Fixes: 78c168342 (drm/amdgpu: allow split of queues with kfd at queue granularity v4) Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: Rename KIQ ring to avoid spacesTom St Denis1-1/+1
Swap space for underscore in ring name. Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/amdgpu: gfx9 tidy ups (v2)Tom St Denis1-19/+7
A couple of simple tidy ups to register programming. Signed-off-by: Tom St Denis <tom.stdenis@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v2): Avoid using 'data' uninitialized Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: add contiguous flag in ucode bo createhorchen1-1/+2
Under VF environment, the ucode would be settled to the visible VRAM, As it would be pinned to the visible VRAM, it's better to add contiguous flag,otherwise it need to move gpu address during the pin process. This movement is not necessary. Signed-off-by: horchen <horace.chen@amd.com> Reviewed-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: fix missed gpu info firmware when cache firmware during S3Huang Rui2-8/+13
gpu_info firmware is released after data is used. But when system enters into suspend, upper class driver will cache all firmware names. At that time, gpu_info will be failing to load. It seems an upper class issue, that we should not release gpu_info firmware until device finished. [ 903.236589] cache_firmware: amdgpu/vega10_sdma1.bin [ 903.236590] fw_set_page_data: fw-amdgpu/vega10_sdma1.bin buf=ffff88041eee10c0 data=ffffc90002561000 size=17408 [ 903.236591] cache_firmware: amdgpu/vega10_sdma1.bin ret=0 [ 903.464160] __allocate_fw_buf: fw-amdgpu/vega10_gpu_info.bin buf=ffff88041eee2c00 [ 903.471815] (NULL device *): loading /lib/firmware/updates/4.11.0-custom/amdgpu/vega10_gpu_info.bin failed with error -2 [ 903.482870] (NULL device *): loading /lib/firmware/updates/amdgpu/vega10_gpu_info.bin failed with error -2 [ 903.492716] (NULL device *): loading /lib/firmware/4.11.0-custom/amdgpu/vega10_gpu_info.bin failed with error -2 [ 903.503156] (NULL device *): direct-loading amdgpu/vega10_gpu_info.bin Signed-off-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: export test ib debugfs interfaceHuang Rui1-0/+54
As Christian and David's suggestion, submit the test ib ring debug interfaces. It's useful for debugging with the command submission without VM case. Signed-off-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/powerplay: add GPU power display for vega10Eric Huang1-0/+20
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amd/powerplay: update vega10_ppsmc.hEric Huang1-1/+2
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: avoid to reset wave_front_size to 0Hawking Zhang1-2/+0
No need to clear it. The values are set explicitly. Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-15drm/amdgpu: add new member in gpu_info fwHawking Zhang3-0/+11
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2017-06-14drm: Remove duplicate forward declarationDawid Kurek1-2/+0
Forward declarations in C are great but I'm pretty sure one is enough. Signed-off-by: Dawid Kurek <dawikur@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/20170614213518.GA3554@gmail.com
2017-06-14drm/panel: s6e3ha2: Add support for s6e3hf2 panel on TM2e boardHoegeun Kwon1-7/+57
This patch supports TM2e panel and the panel has 1600x2560 resolution in 5.65" physical. This identify panel type with compatibility string, also invoke display mode that matches the type. So add the check code for s6e3ha2 compatibility and s6e3hf2 type and select the drm_display_mode of default and edge type. Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Inki Dae <inki.dae@samsung.com> [treding@nvidia.com: fixup checkpatch warnings] Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/1492504836-19225-3-git-send-email-hoegeun.kwon@samsung.com
2017-06-14dt-bindings: Add support for samsung s6e3hf2 panelHoegeun Kwon1-1/+4
The samsung s6e3hf2 panel is a 5.65" 1600x2560 AMOLED panel connected using MIPI-DSI interfaces. The s6e3hf2 is add to samsung,s6e3ha2.txt binding because it is a panel similar to the s6e3ha2. So add the compatible string and comments. Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/1492504836-19225-2-git-send-email-hoegeun.kwon@samsung.com
2017-06-14drm/panel: add backlight dependency for sitronix-st7789vArnd Bergmann1-0/+1
Without the dependency, we run into a link error: drivers/gpu/drm/panel/panel-sitronix-st7789v.o: In function `st7789v_probe': panel-sitronix-st7789v.c:(.text.st7789v_probe+0xc0): undefined reference to `of_find_backlight_by_node' Fixes: 7142afb3a186 ("drm/panel: Add driver for sitronix ST7789V LCD controller") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170419180326.303994-1-arnd@arndb.de
2017-06-14drm/panel: S6E3HA2 needs backlight codeArnd Bergmann1-0/+1
The new S6E3HA2 driver fails to link when backlight is disabled: ERROR: "backlight_device_register" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined! ERROR: "backlight_device_unregister" [drivers/gpu/drm/panel/panel-samsung-s6e3ha2.ko] undefined! This adds a Kconfig dependency like we have it for some other panel drivers. Fixes: ed29f9426d9b ("drm/panel: Add support for S6E3HA2 panel driver on TM2 board") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Hoegeun Kwon <hoegeun.kwon@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170419175939.189098-2-arnd@arndb.de
2017-06-14drm/panel: simple: add support for AUO P320HVN03Lucas Stach2-0/+39
This adds support for the AU Optronics Corporation 31.5" FHD (1920x1080) LVDS TFT LCD panel, which can be supported by the simple panel driver Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-4-l.stach@pengutronix.de
2017-06-14drm/panel: simple: add support for NLT NL192108AC18-02DLucas Stach2-0/+37
This adds support for the NLT Technologies NL192108AC18-02D 15.6" LVDS FullHD TFT LCD panel, which can be supported by the simple panel driver. Timings are taken from the preliminary datasheet, as a final one is not yet available. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-3-l.stach@pengutronix.de
2017-06-14dt-bindings: add vendor prefix for NLT Technologies, Ltd.Lucas Stach1-0/+1
NLT technologies is the former NEC display business, but changed its name to NLT Technologies when forming a joint venture with Shenzhen AVIC OPTOELECTRONICS, Ltd. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-2-l.stach@pengutronix.de
2017-06-14drm/panel: simple: add support for NEC NL12880B20-05Lucas Stach2-0/+38
This adds support for the NEC LCD Technologies, Ltd. 12.1" WXGA (1280x800) LVDS TFT LCD panel, which can be supported by the simple panel driver. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170608180758.31020-1-l.stach@pengutronix.de
2017-06-14drm/panel: add Innolux P079ZCA panel driverChris Zhong3-0/+352
Support Innolux P079ZCA 7.85" 768x1024 TFT LCD panel, it is a MIPI DSI panel. Signed-off-by: Chris Zhong <zyw@rock-chips.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Tested-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: http://patchwork.freedesktop.org/patch/msgid/1490316692-20506-2-git-send-email-zyw@rock-chips.com