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path: root/drivers/gpu/drm/i915/intel_lspcon.c
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2018-11-13drm/i915: Switch LSPCON to PCON mode if it's in LS modeVille Syrjälä
We no longer change LSPCON into PCON mode if it boots up in LS mode. This was broken by some code shuffling in commit 96e35598cead ("drm/i915: Check LSPCON vendor OUI"). I actually can't see a reason why that code shuffling had to be done. The commit msg notes it but doesn't justify it in any way. But I guess we'll keep the code in its current place anyway and just make the "switch to PCON mode" part effective once again. Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Tested-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Fixes: 96e35598cead ("drm/i915: Check LSPCON vendor OUI") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181107171821.27862-1-ville.syrjala@linux.intel.com Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
2018-10-15drm/i915: Add YCBCR 4:2:0/4:4:4 support for LSPCONShashank Sharma
LSPCON chips can generate YCBCR outputs, if asked nicely :). In order to generate YCBCR 4:2:0 outputs, a source must: - send YCBCR 4:4:4 signals to LSPCON - program color space as 4:2:0 in AVI infoframes Whereas for YCBCR 4:4:4 outputs, the source must: - send YCBCR 4:4:4 signals to LSPCON - program color space as 4:4:4 in AVI infoframes So for both 4:2:0 as well as 4:4:4 outputs, we are driving the pipe for YCBCR 4:4:4 output, but AVI infoframe's color space information indicates LSPCON FW to start scaling down from YCBCR 4:4:4 and generate YCBCR 4:2:0 output. As the scaling is done by LSPCON device, we need not to reserve a scaler for 4:2:0 outputs. V2: rebase V3: Addressed review comments from Ville - add enum crtc_output_format instead of bool ycbcr420 - use crtc_output_format=4:4:4 for modeset of LSPCON 4:2:0 output cases in this way we will have YCBCR 4:4:4 framework ready (except the ABI part) V4: Added r-b from Maarten (for v3) Addressed review comments from Ville: - Do not add a non-atomic state variable to determine lspcon output. Instead add bool in CRTC state to indicate lspcon based scaling. V5: Addressed review comments from Ville: - Change the state bool name from external scaling to something more relavent. - Keep the info and adjusted_mode structures const. - use crtc_state instead of pipe_config. - Push all the config change into lspcon_ycbcr420_config function. V6: Rebase, small changes to accommodate changes in patch 2. V7: Fixed checkpatch warnings for alignment V8: Rebase PS: Ignored following warnings to match the current formatting: drm/i915: Add YCBCR 4:2:0/4:4:4 support for LSPCON -:53: CHECK:SPACING: spaces preferred around that '<<' (ctx:VxV) #53: FILE: drivers/gpu/drm/i915/i915_reg.h:8721: +#define TRANS_MSA_SAMPLING_444 (2<<1) ^ -:54: CHECK:SPACING: spaces preferred around that '<<' (ctx:VxV) #54: FILE: drivers/gpu/drm/i915/i915_reg.h:8722: +#define TRANS_MSA_CLRSP_YCBCR (2<<3) V9: Rebase V10: Rebase V11: Rebase Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-8-git-send-email-shashank.sharma@intel.com
2018-10-15drm/i915: Write AVI infoframes for Parade LSPCONShashank Sharma
Different LSPCON vendors specify their custom methods to pass AVI infoframes to the LSPCON chip, so does Parade tech. This patch adds functions to arrange and write AVI infoframes into Parade LSPCON chips. V2: rebase V3: Added r-b from Maarten V4: rebase V5: rebase V6: rebase V7: Fixed checkpatch warnings for alignment V8: Rebase V9: Rebase V10: Rebase Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-7-git-send-email-shashank.sharma@intel.com
2018-10-15drm/i915: Write AVI infoframes for MCA LSPCONShashank Sharma
LSPCON is a DP branch device, so LSPCON vendors define specific methods to pass AVI infoframes to the the chip. This patch adds: - a generic wrapper function for writing AVI infoframes for all LSPCON devices. - a vendor specific function to wrire AVI infoframes into MCA LSPCON devices. V2: Rebase V3: Added r-b from Maarten V4: Rebase V5: Rebase V6: Rebase V7: Fixed checkpatch warnings for alignment V8: Rebase V9: Added the retry logic, with 50ms incremental delays while writing AVI IF V10: Changed the return value check V11: Fixed checkpatch warning V12: Rebase Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-6-git-send-email-shashank.sharma@intel.com
2018-10-15drm/i915: Add AVI infoframe support for LSPCONShashank Sharma
In order to pass AVI infoframes to LSPCON devices, a source has to write them in a vendor recommended method and location. This patch series: - adds generic LSPCON infoframe setup functions. - registers these functions into existing AVI infoframe framework. - triggers these functions from modeset sequence. Next patches in the series will add vendor specific code. V2: Added new parameter to align with new definition of drm_hdmi_avi_infoframe_quant_range V3: Added r-b from Maarten (for V2) Added new parameter output_format in struct lspcon to accommodate Ville's review comments on last patch of the series V4: Addressed Ville's review comment - Do not add output_format in LSPCON state, as its non-atomic. Add this into CRTC state (added in a later patch). V5: Rebase V6: Rebase V7: Rebase V8: Rebase V9: Rebase V10: Rebase V11: Accommodated rebasing changes in intel_git_port fptrs (set_infoframes and infoframe_enabled) Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Imre Deak <imre.deak@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-5-git-send-email-shashank.sharma@intel.com
2018-10-15drm/i915: Check LSPCON vendor OUIShashank Sharma
Intel LSPCON chip is provided by 2 vendors: - Megachips America (MCA) - Parade technologies (Parade tech) Its important to know the vendor of this chip, as the address to write AVI infoframes is different for those two. This patch reads the vendor OUI signature, and marks into LSPCON encoder structure for future usages. This patch also does a small re-arrangement of the code, by moving lspcon mode change into probe function. V2: Use dp->desc for OUI detection, dont add a helper for this (Ville) V3: Rebase, Added r-b from Maarten V4: Rebase V5: Rebase V6: Rebase V7: Rebase V8: Rebase V9: Rebase V10: Rebase Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1539325394-20788-4-git-send-email-shashank.sharma@intel.com
2018-08-20drm/i915: Increase LSPCON timeoutFredrik Schön
100 ms is not enough time for the LSPCON adapter on Intel NUC devices to settle. This causes dropped display modes at boot or screen reconfiguration. Empirical testing can reproduce the error up to a timeout of 190 ms. Basic boot and stress testing at 200 ms has not (yet) failed. Increase timeout to 400 ms to get some margin of error. Changes from v1: The initial suggestion of 1000 ms was lowered due to concerns about delaying valid timeout cases. Update patch metadata. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107503 Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1570392 Fixes: 357c0ae9198a ("drm/i915/lspcon: Wait for expected LSPCON mode to settle") Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: <stable@vger.kernel.org> # v4.11+ Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Fredrik Schön <fredrik.schon@gmail.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180817200728.8154-1-fredrik.schon@gmail.com
2018-06-18drm/i915/lspcon: switch to kernel unsigned int typesJani Nikula
We have fairly mixed uintN_t vs. uN usage throughout the driver, but try to stick to kernel types at least where it's more prevalent. Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1e132575785d9b615208eb60ee5e388df5991172.1528794959.git.jani.nikula@intel.com
2018-01-30drm/i915: For HPD connected port use hpd_pin instead of port.Rodrigo Vivi
Let's try to simplify this mapping to hpd_pin -> bit instead using port. So for CNL with port F where we have this port using hdp_pin and bits of other ports we don't need to duplicated the mapping. But for now this is only a re-org with no functional change expected. v2: Add missing lines and nuke @port reference from code documentation. (Ville) Cc: Lucas De Marchi <lucas.demarchi@intel.com> Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180129232223.766-7-rodrigo.vivi@intel.com
2017-10-13drm/i915: Add retries for LSPCON detectionShashank Sharma
We read the dp dual mode Adapter identifier to detect the LSPCON device. It's been observed from the CI testing that in few cases, this read can get delayed or fail. For such scenarios, LSPCON vendors suggest to retry the read operation. This patch adds retry in the probe function, while reading LSPCON identifier. V3: added this patch in the series Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102294 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102295 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102359 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103186 Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1507630064-17908-4-git-send-email-shashank.sharma@intel.com
2017-10-13drm/i915: Don't give up waiting on INVALID_MODEShashank Sharma
Our current logic to read LSPCON's current mode, stops retries and breaks wait-loop, if it gets LSPCON_MODE_INVALID as return from the core function. This doesn't allow us to try reading the mode again. This patch removes this condition and allows retries reading the currnt mode until timeout. This also fixes/prevents some of the noise in form of debug messages while running IGT CI test cases. V2: rebase, added r-b V2: changed some debug message levels from debug->error and error->debug in lspcon_get_current_mode function. V3: Rebase Cc: Imre Deak <imre.deak@intel.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102294 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102295 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102359 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103186 Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Mahesh Kumar <Mahesh1.kumar@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1507630064-17908-3-git-send-email-shashank.sharma@intel.com
2017-08-16drm/i915/cnl: Fix LSPCON support.Rodrigo Vivi
When LSPCON support was extended to CNL one part was missed on lspcon_init. So, instead of adding check per platform on lspcon_init let's use HAS_LSPCON that is already there for that purpose. Fixes: ff15947e0f02 ("drm/i915/cnl: LSPCON support is gen9+") Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170816030403.11368-1-rodrigo.vivi@intel.com
2017-05-29drm/i915: use drm DP helper to read DPCD descJani Nikula
Switch to using the common DP helpers instead of using our own. v2: also remove leftover struct intel_dp_desc (Daniel) Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-02-06drm/i915/lspcon: Remove DPCD compare based resume time workaroundImre Deak
This effectively reverts commit 489375c866c111f16cea93b2467ebe59c9022cc7 Author: Imre Deak <imre.deak@intel.com> Date: Mon Oct 24 19:33:31 2016 +0300 drm/i915/lspcon: Add workaround for resuming in PCON mode The workaround was added without considering that HPD is low during the failed AUX transfers the WA fixed. Since the previous patch we wait for HPD to get asserted. My tests also show that this happens _after_ the DPCD reads start to return correct values. This suggests that we don't need this WA any more, let's try to remove it to reduce the clutter. Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1485509961-9010-4-git-send-email-imre.deak@intel.com
2017-02-06drm/i915/lspcon: Fix resume time initialization due to unasserted HPDImre Deak
During system resume time initialization the HPD level on LSPCON ports can stay low for an extended amount of time, leading to failed AUX transfers and LSPCON initialization. Fix this by waiting for HPD to get asserted. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99178 Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: <stable@vger.kernel.org> # v4.9+ Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1485509961-9010-3-git-send-email-imre.deak@intel.com
2016-11-23drm/i915/lspcon: Remove unused force change mode parameterImre Deak
All callers asked for a forced change but the function ignored this parameter. It doesn't seem to be necessary to force the change in any case so let's just remove the parameter. Cc: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1479755707-29596-5-git-send-email-imre.deak@intel.com
2016-11-23drm/i915/lspcon: Wait for expected LSPCON mode to settleImre Deak
Some LSPCON adaptors may return an incorrect LSPCON mode right after waking from DP Sleep state. This is the case at least for the ParadTech PS175 adaptor, both when waking because of exiting the DP Sleep to active state, or due to any other AUX CH transfer. We can determine the current expected mode based on whether the DPCD area is accessible, since according to the LSPCON spec this area is only accesible in PCON mode. This wait will avoid us trying to change the mode, while the current expected mode hasn't settled yet and start link training before the adaptor thinks it's in PCON mode after waking from DP Sleep state. Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1479755707-29596-4-git-send-email-imre.deak@intel.com
2016-11-23drm/i915/lspcon: Ensure AUX CH is awake while in DP Sleep stateImre Deak
Some LSPCON adaptors won't properly wake up in response to an AUX request after the adaptor was placed to a DP Sink Sleep state (via writing 0x2 to DP_SET_POWER). Based on the DP 1.4 specification 5.2.5, the sink may place the AUX CH into a low-power state while in Sleep state, but should wake it up in response to an AUX request within 1-20ms (answering with AUX defers while waking it up). As opposed to this at least the ParadTech PS175 adaptor won't fully wake in response to the first I2C-over-AUX access and will occasionally ignore the offset in I2C messages. This can result in accessing the DDC register at offset 0 regardless of the specified offset and the LSPCON detection failing. To fix this do an initial dummy read from the DPCD area. The PS175 will defer this access until it's fully woken (taking ~150ms) making sure the following I2C-over-AUX accesses will work correctly. Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Reference: https://bugs.freedesktop.org/show_bug.cgi?id=98353 Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1479755707-29596-2-git-send-email-imre.deak@intel.com
2016-10-26drm/i915/lspcon: Add workaround for resuming in PCON modeImre Deak
On my APL the LSPCON firmware resumes in PCON mode as opposed to the expected LS mode. It also appears to be in a state where AUX DPCD reads will succeed but return garbage recovering only after a few hundreds of milliseconds. After the recovery time DPCD reads will result in the correct values and things will continue to work. If I2C over AUX is attempted during this recovery time (implying an AUX write transaction) the firmware won't recover and will stay in this broken state. As a workaround check if the firmware is in PCON state after resume and if so wait until the correct DPCD values are returned. For this we compare the branch descriptor with the one we cached during init time. If the firmware was in the LS state, we skip the w/a and continue as before. v2: - Use the DP descriptor value cached in intel_dp. (Jani) - Get to intel_dp using container_of(), instead of a cached ptr. (Shashank) - Use usleep_range() instead of msleep(). Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98353 Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-9-git-send-email-imre.deak@intel.com
2016-10-26drm/i915/lspcon: Get DDC adapter via container_of() instead of cached ptrImre Deak
We can use the container_of() magic to get to the DDC adapter, so no need for caching a pointer to it. We'll also need to get at the intel_dp ptr in the following patch, so add a helper that can be used for both purposes. Cc: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-8-git-send-email-imre.deak@intel.com
2016-10-26drm/i915/dp: Read DP descriptor for eDP and LSPCON tooImre Deak
As for external DP sink and branch devices read and print the DP descriptor for eDP and LSPCON devices as well to aid debugging. v2: - Split out this change to a separate patch. (Jani) Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-7-git-send-email-imre.deak@intel.com
2016-10-26drm/i915/lspcon: Fail LSPCON probe if the start of DPCD can't be readImre Deak
All types of DP devices (eDP, DP sink, DP branch) will fail their probe if the start of DPCD can't be read. The LSPCON PCON functionality also depends on accessing this area, so fail the probe if the read fails. Cc: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1477326811-30431-6-git-send-email-imre.deak@intel.com
2016-10-19drm/i915: make lspcon_get_current_mode staticJani Nikula
Fixes sparse warning: drivers/gpu/drm/i915/intel_lspcon.c:30:22: warning: symbol 'lspcon_get_current_mode' was not declared. Should it be static? Fixes: dbe9e61b8e43 ("drm/i915: Add lspcon support for I915 driver") Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1476789711-19697-2-git-send-email-jani.nikula@intel.com
2016-10-18drm/i915: Add lspcon resume functionShashank Sharma
As per the software design, we are driving lspcon in PCON mode. But while resuming from suspend, lspcon can go in LS mode (which is its default operating mode on power on) This patch adds a resume function for lspcon, which makes sure its operating in PCON mode, post resume. V2: Address review comments from Imre - move lspcon_resume call to encoder->reset() - use early returns Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-6-git-send-email-shashank.sharma@intel.com
2016-10-18drm/i915: Add lspcon support for I915 driverShashank Sharma
This patch adds a new file, to accommodate lspcon support for I915 driver. These functions probe, detect, initialize and configure an on-board lspcon device during the driver init time. Also, this patch adds a small structure for lspcon device, which will provide the runtime status of the device. V2: addressed ville's review comments - Clean the leftover macros from previous patch set V3: Rebase V4: addressed ville's review comments - make internal functions static - remove lspcon_detect_identifier, make it inline with lspcon_probe - remove is_lspcon_active function - remove force check while setting a lspcon mode V5: Rebase V6: Pass dev_priv to IS_GEN9 check Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Akashdeep Sharma <akashdeep.sharma@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-3-git-send-email-shashank.sharma@intel.com
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