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path: root/drivers/gpu/drm/amd/display/dc/dc_link.h
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* drm/amd/display: Detach backlight from streamDavid Francis2019-01-161-2/+1
| | | | | | | | | | | | | | | | | | | | [Why] Backlight is conceptually a property of links, not streams. All backlight programming is done on links, but there is a stream property bl_pwm_level that is used to restore backlight on dpms on and s3 resume. This is unnecessary, as backlight is already restored by hardware with no driver intervention. [How] Remove bl_pwm_level, and the stream argument to set_backlight Bug: https://bugs.freedesktop.org/show_bug.cgi?id=109375 Signed-off-by: David Francis <David.Francis@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Anthony Koo <Anthony.Koo@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit 923fe4951282cbdfce05186c10380bbc45b5e03b)
* drm/amd/display: Start documentation of DCDavid Francis2018-11-301-2/+4
| | | | | | | | | | | | | | | | | | | | [Why] There are a lot of unintuitive parts of the dm-dc interface. It would help us if these were documented to provide a common understanding of what they are supposed to do [How] Most of this documentation is stubs, to be filled out more thoroughly by the experts Not every dm-accessible function and struct is mentioned. Simple functions like getters, setters, retain, release, create, destroy can be left unadorned. Signed-off-by: David Francis <David.Francis@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Expand dc to use 16.16 bit backlightAnthony Koo2018-11-051-3/+8
| | | | | | | | | | | | | | | [Why] We want to increase precision for backlight setting. But DC interface takes 8 bit backlight level value only. [How] DMCU already takes 16 bit backlight level. Expand the DC interface to take 16.16 bit value. Max 32 bit backlight value (0xFFFF) will represent max backlight (100%) Signed-off-by: Anthony Koo <Anthony.Koo@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* BackMerge v4.19-rc6 into drm-nextDave Airlie2018-10-041-0/+1
|\ | | | | | | | | | | I have some pulls based on rc6, and I prefer to have an explicit backmerge. Signed-off-by: Dave Airlie <airlied@redhat.com>
| * drm/amd/display: Fix Edid emulation for linuxBhawanpreet Lakha2018-09-271-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Why] EDID emulation didn't work properly for linux, as we stop programming if nothing is connected physically. [How] We get a flag from DRM when we want to do edid emulation. We check if this flag is true and nothing is connected physically, if so we only program the front end using VIRTUAL_SIGNAL. Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* | drm/amd/display: add query HPD interface.Chiawen Huang2018-09-141-0/+1
|/ | | | | | | | | | | | | [Why] current dc_link_detect function is not only detection but also update some link data. [How] added a pure get HPD state function. Signed-off-by: Chiawen Huang <chiawen.huang@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: add vbios table check for enabling dp ssDmytro Laktyushkin2018-08-061-0/+1
| | | | | | | Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Implement backlight_ops.get_brightnessDavid Francis2018-08-061-0/+2
| | | | | | | | | | | | | | | | [Why] This hook that is supposed to read the actual backlight value is used in a few places throughout the kernel to setup or force update on backlight [How] Create a dc function that calls the existing abm function, and call that function from amdgpu Signed-off-by: David Francis <David.Francis@amd.com> Reviewed-by: Harry Wentland <Harry.Wentland@amd.com> Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Return out_link_loss from interrupt handlerFatemeh Darbehani2018-07-131-1/+1
| | | | | | | Signed-off-by: Fatemeh Darbehani <fatemeh.darbehani@amd.com> Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Serialize is_dp_sink_presentHarry Wentland2018-07-131-0/+2
| | | | | | | | | | | | | | Access to GPIO needs to be serialized. Aux transactions are already serialized in DRM but we also need to serialize access to the GPIO pin for purposes of DP dongle detection. Call is_dp_sink_present through DM so we can lock correctly. This follows the same pattern used for DPCD transactions. Signed-off-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Linux Set/Read link rate and lane count through debugfsHersen Wu2018-07-131-0/+17
| | | | | | | | | expose dc function to be called by linux dm Signed-off-by: Hersen Wu <hersenxs.wu@amd.com> Reviewed-by: Sun peng Li <Sunpeng.Li@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: fix brightness level after resume from suspendRoman Li2018-05-151-0/+2
| | | | | | | | | | Adding missing call to cache current backlight values. Otherwise the brightness resets to default value on resume. Signed-off-by: Roman Li <Roman.Li@amd.com> Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: add delay between panel pwr off to on.Charlene Liu2018-04-111-0/+9
| | | | | | | | | | | | | As per eDP 1.4 spec, there must be at least 500ms delay between eDP power off and on. This change added time stamp when edp power off, which can be used to calculate duration time when edp power on. If duration less than 500ms, add a wait. Signed-off-by: Charlene Liu <charlene.liu@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Add passive dongle support for HPD RearchJohn Barberiz2018-03-051-1/+1
| | | | | | | | | | | | Add HPD delay timer support to 1. Single/dual link DVI. 2. DP to HDMI passive dongle 3. DP to DVI passive dongle. Signed-off-by: John Barberiz <jbarberi@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Rearchitecture HDMI HPDJohn Barberiz2018-02-191-0/+4
| | | | | | | | | | - Disabled HPD filter and used HPD software timer instead - Allows DM to disable HPD filtering Signed-off-by: John Barberiz <jbarberi@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
* drm/amd/display: Move dc_link interface to separate headerHarry Wentland2017-12-061-0/+207
Signed-off-by: Harry Wentland <harry.wentland@amd.com> Reviewed-by: Tony Cheng <Tony.Cheng@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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