- 07 May, 2022 2 commits
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Dmitry Baryshkov authored
There is no need to check that kfree() argument is not NULL. Remove extra check and call kfree() unconditionally. Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20220507114009.1696278-1-dmitry.baryshkov@linaro.orgSigned-off-by:
Rob Clark <robdclark@chromium.org>
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Rob Clark authored
Running the GPU without an IOMMU is not really a supported (or sane) configuration. Yet it can be useful during SoC bringup (ie. if the iommu driver doesn't work yet). Lets limit it to users who already have /dev/mem access, to avoid the chance that a user accidentially configures kernel without IOMMU support. Signed-off-by:
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- 06 May, 2022 11 commits
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Dmitry Baryshkov authored
Remove dividers that are not recommended for DSI DPHY mode when setting up the clock tree for the DSI pixel clock. Signed-off-by:
Stephen Boyd <swboyd@chromium.org> Patchwork: https://patchwork.freedesktop.org/patch/484333/ Link: https://lore.kernel.org/r/20220501195620.4135080-1-dmitry.baryshkov@linaro.orgSigned-off-by:
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Douglas Anderson authored
When rebooting on my sc7280-herobrine based device, I got a crash. Upon debugging, I found that I was in msm_drv_shutdown() and my "pdev" was the one associated with mdss_probe(). From source, I found that mdss_probe() has the line: platform_set_drvdata(pdev, mdss); ...where "mdss" is of type "struct msm_mdss *". Also from source, I saw that in msm_drv_shutdown() we have the line: struct msm_drm_private *priv = platform_get_drvdata(pdev); This is a mismatch and is the root of the problem. Further digging made it apparent that msm_drv_shutdown() is only supposed to be used for parts of the msm display framework that also call msm_drv_probe() but mdss_probe() doesn't call msm_drv_probe(). Let's remove the shutdown functon from msm_mdss.c. Digging a little further, code inspection found that two drivers that use msm_drv_probe() weren't calling msm_drv_shutdown(). Let's add it to them. Fixes: 6874f48b ("drm/msm: make mdp5/dpu devices master components") Signed-off-by:
Douglas Anderson <dianders@chromium.org> Reviewed-by:
Abhinav Kumar <quic_abhinavk@quicinc.com> Patchwork: https://patchwork.freedesktop.org/patch/484975/ Link: https://lore.kernel.org/r/20220504163900.v2.1.Iaebd35e60160fc0f2a50fac3a0bf3b298c0637c8@changeidSigned-off-by:
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Dan Carpenter authored
The msm_gem_prime_get_sg_table() needs to return error pointers on error. This is called from drm_gem_map_dma_buf() and returning a NULL will lead to a crash in that function. Fixes: ac451467 ("drm/msm: fix msm_gem_prime_get_sg_table()") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
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Jessica Zhang authored
There is a possibility for mdp5_get_global_state to return -EDEADLK when acquiring the modeset lock, but currently global_state in mdp5_mixer_release doesn't check for if an error is returned. To avoid a NULL dereference error, let's have mdp5_mixer_release check if an error is returned and propagate that error. Reported-by:
Tomeu Vizoso <tomeu.vizoso@collabora.com> Signed-off-by:
Jessica Zhang <quic_jesszhan@quicinc.com> Fixes: 7907a0d7 ("drm/msm/mdp5: Use the new private_obj state") Reviewed-by:
Rob Clark <robdclark@gmail.com> Reviewed-by:
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Jessica Zhang authored
mdp5_get_global_state runs the risk of hitting a -EDEADLK when acquiring the modeset lock, but currently mdp5_pipe_release doesn't check for if an error is returned. Because of this, there is a possibility of mdp5_pipe_release hitting a NULL dereference error. To avoid this, let's have mdp5_pipe_release check if mdp5_get_global_state returns an error and propogate that error. Changes since v1: - Separated declaration and initialization of *new_state to avoid compiler warning - Fixed some spelling mistakes in commit message Changes since v2: - Return 0 in case where hwpipe is NULL as this is considered normal behavior - Added 2nd patch in series to fix a similar NULL dereference issue in mdp5_mixer_release Reported-by:
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Kuogee Hsieh authored
Event thread supposed to exit from its while loop after kthread_stop(). However there may has possibility that event thread is pending in the middle of wait_event due to condition checking never become true. To make sure event thread exit its loop after kthread_stop(), this patch OR kthread_should_stop() into wait_event's condition checking so that event thread will exit its loop after kernal_stop(). Changes in v2: -- correct spelling error at commit title Changes in v3: -- remove unnecessary parenthesis -- while(1) to replace while (!kthread_should_stop()) Reported-by:
Kuogee Hsieh <quic_khsieh@quicinc.com> Reviewed-by:
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Dmitry Baryshkov authored
Correct a typo in the address of the second DSI PHY in the SDM660 device config. Fixes: 694dd304 ("drm/msm/dsi: Add phy configuration for SDM630/636/660") Cc: Konrad Dybcio <konrad.dybcio@somainline.org> Signed-off-by:
Konrad Dybcio <konrad.dybcio@somainline.org> Patchwork: https://patchwork.freedesktop.org/patch/484697/ Link: https://lore.kernel.org/r/20220503204340.935532-1-dmitry.baryshkov@linaro.orgSigned-off-by:
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Konrad Dybcio authored
Due to MSM8998 support having been stuck in review for so long, another struct was added nearby, which confused git and resulted in the definitions not being sorted alphabetically. Fix it. Signed-off-by:
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Vinod Polimera authored
If edp modeset init is failed due to panel being not ready and probe defers during drm bind, avoid clearing irqs and dereference hw_intr when hw_intr is null. BUG: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: dpu_core_irq_uninstall+0x50/0xb0 dpu_irq_uninstall+0x18/0x24 msm_drm_uninit+0xd8/0x16c msm_drm_bind+0x580/0x5fc try_to_bring_up_master+0x168/0x1c0 __component_add+0xb4/0x178 component_add+0x1c/0x28 dp_display_probe+0x38c/0x400 platform_probe+0xb0/0xd0 really_probe+0xcc/0x2c8 __driver_probe_device+0xbc/0xe8 driver_probe_device+0x48/0xf0 __device_attach_driver+0xa0/0xc8 bus_for_each_drv+0x8c/0xd8 __device_attach+0xc4/0x150 device_initial_probe+0x1c/0x28 Changes in V2: - Update commit message and coreect fixes tag. Fixes: f25f6566 ("drm/msm/dpu: merge struct dpu_irq into struct dpu_hw_intr") Signed-off-by:
Vinod Polimera <quic_vpolimer@quicinc.com> Reviewed-by:
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Dmitry Baryshkov authored
Move the initializer for the mode variable to the declaration point to remove unitialized variable access from the DEBUG_DPU macro. This fixes the following warning: drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c:250:37: note: initialize the variable 'mode' to silence this warning Fixes: d7d0e73f ("drm/msm/dpu: introduce the dpu_encoder_phys_* for writeback") Reported-by:
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Abhinav Kumar authored
Add missing break statement for dpu_hw_ctl_update_pending_flush_wb(). Otherwise this leads to below build warning. drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c:273:2: warning: unannotated fall-through between switch labels default: ^ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c:273:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 warning generated. Fixes: 6d084806 ("drm/msm/dpu: add changes to support writeback in hw_ctl") Reported-by:
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- 02 May, 2022 1 commit
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Luca Weiss authored
Check if 'aspace' is set before using it as it will stay null without IOMMU, such as on msm8974. Fixes: bc211258 ("drm/msm/gpu: Track global faults per address-space") Signed-off-by:
Luca Weiss <luca@z3ntu.xyz> Link: https://lore.kernel.org/r/20220421203455.313523-1-luca@z3ntu.xyzSigned-off-by:
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- 01 May, 2022 26 commits
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Dmitry Baryshkov authored
The msm driver has dropped support for older eDP block. However the merge conflict in the commit 4ce2ca4b ("drm/msm: Fix include statements for DisplayPort") was resolved incorrectly and two files were left in place. Drop them now (again). Fixes: 4ce2ca4b ("drm/msm: Fix include statements for DisplayPort") Signed-off-by:
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Dmitry Baryshkov authored
Add explicit include of drm_bridge.h to the msm_drv.c to fix the following warning: drivers/gpu/drm/msm/msm_drv.c:236:17: error: implicit declaration of function 'drm_bridge_remove'; did you mean 'drm_bridge_detach'? [-Werror=implicit-function-declaration] Fixes: d28ea556 ("drm/msm: properly add and remove internal bridges") Reported-by:
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Dmitry Baryshkov authored
The downstream uses read-modify-write for updating command mode compression registers. Let's follow this approach. This also fixes the following warning: drivers/gpu/drm/msm/dsi/dsi_host.c:918:23: warning: variable 'reg_ctrl' set but not used [-Wunused-but-set-variable] Reported-by:
Marijn Suijten <marijn.suijten@somainline.org> Patchwork: https://patchwork.freedesktop.org/patch/484305/ Link: https://lore.kernel.org/r/20220430175533.3817792-1-dmitry.baryshkov@linaro.orgSigned-off-by:
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Marijn Suijten authored
While there's a comment pointing from dpu_intr_set to dpu_hw_intr_reg and vice-versa, an array initializer using indices makes it so that the indices between the enum and array cannot possibly get out of sync even if they're accidentially ordered wrongly. It is still useful to keep the comment to be made aware where the register offset mapping resides while looking at dpu_hw_intr_reg. Signed-off-by:
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Jessica Zhang authored
Currently, dpu_hw_lm_collect_misr returns EINVAL if CRC is disabled. This causes a lot of spam in the DRM debug logs as it's called for every vblank. Instead of returning EINVAL when CRC is disabled in dpu_hw_lm_collect_misr, let's return ENODATA and add an extra ENODATA check before the debug log in dpu_crtc_get_crc. Changes since V1: - Added reported-by and suggested-by tags Reported-by:
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Vinod Polimera authored
Set mdp clock to max clock rate during probe/bind sequence from the opp table so that rails are not at undetermined state. Since we do not know what will be the rate set in boot loader, it would be ideal to vote at max frequency. There could be a firmware display programmed in bootloader and we want to transition it to kernel without underflowing. The clock will be scaled down later when framework sends an update. Fixes: 25fdd593 ("drm/msm: Add SDM845 DPU support") Signed-off-by:
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Abhinav Kumar authored
Remove the unused local variable refcount for encoder_phys_wb as the one part of wb_enc is used directly. changes in v2: - remove usage of ret variable also - remove the if (ret) code as it was dead-code anyway Fixes: d7d0e73f ("drm/msm/dpu: introduce the dpu_encoder_phys_* for writeback") Reported-by:
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Guo Zhengkui authored
Fix the following coccicheck warning: drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c:24:5-8: Unneeded variable: "ret". Return "0" on line 75. Signed-off-by:
Guo Zhengkui <guozhengkui@vivo.com> Reviewed-by:
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Lv Ruyi authored
The irq_of_parse_and_map() function returns 0 on failure, and does not return an negative value. Reported-by:
Zeal Robot <zealci@zte.com.cn> Signed-off-by:
Lv Ruyi <lv.ruyi@zte.com.cn> Reviewed-by:
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Haowen Bai authored
Since mdp5_state is initialized twice at the same time, so we make code simple and easy to understand by delete one. Signed-off-by:
Haowen Bai <baihaowen@meizu.com> Reviewed-by:
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Lv Ruyi authored
The irq_of_parse_and_map() function returns 0 on failure, and does not return a negative value anyhow, so never enter this conditional branch. Fixes: f6a8eaca ("drm/msm/mdp5: use irqdomains") Reported-by:
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Yang Yingliang authored
It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, we need check the return value. Fixes: c6a57a50 ("drm/msm/hdmi: add hdmi hdcp support (V3)") Signed-off-by:
Yang Yingliang <yangyingliang@huawei.com> Reviewed-by:
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Dmitry Baryshkov authored
As noticed by Dan ([1] an the followup thread) there are multiple issues with the return values for MSM DSI command transmission callback. In the error case it can easily return a positive value when it should have returned a proper error code. This commits attempts to fix these issues both in TX and in RX paths. [1]: https://lore.kernel.org/linux-arm-msm/20211001123617.GH2283@kili/ Fixes: a689554b ("drm/msm: Initial add DSI connector support") Reported-by:
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Kuogee Hsieh authored
At normal operation, transmit phy test pattern has to be terminated before DP controller switch to video ready state. However during phy compliance testing, transmit phy test pattern should not be terminated until end of compliance test which usually indicated by unplugged interrupt. Only stop sending the train pattern in dp_ctrl_on_stream() if we're not doing compliance testing. We also no longer reset 'p_level' and 'v_level' within dp_ctrl_on_link() due to both 'p_level' and 'v_level' are acquired from link status at previous dpcd read and we like to use those level to start link training. Changes in v2: -- add more details commit text -- correct Fixes Changes in v3: -- drop unnecessary braces Fixes: 2e0adc76 ("drm/msm/dp: do not end dp link training until video is ready") Signed-off-by:
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Kuogee Hsieh authored
DP controller state can not switch from video ready state to transmit phy pattern state at run time. DP mainlink has to be teared down followed by reset controller to default state to have DP controller switch to transmit phy test pattern state and start generate specified phy test pattern to sinker once main link setup again. Changes in v2: -- correct Fixes's commit id Fixes: 52352fe2 ("drm/msm/dp: use dp_ctrl_off_link_stream during PHY compliance test run") Signed-off-by:
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Sankeerth Billakanti authored
The eDP controller does not have a reliable way keep panel powered on to read the sink capabilities. So, the controller driver cannot validate if a mode can be supported by the source. We will rely on the panel driver to populate only the supported modes for now. Signed-off-by:
Sankeerth Billakanti <quic_sbillaka@quicinc.com> Reviewed-by:
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Sankeerth Billakanti authored
The source device should ensure the sink is ready before proceeding to read the sink capability or perform any aux transactions. The sink will indicate its readiness by asserting the HPD line. The controller driver needs to wait for the hpd line to be asserted by the sink before it performs any aux transactions. The eDP sink is assumed to be always connected. It needs power from the source and its HPD line will be asserted only after the panel is powered on. The panel power will be enabled from the panel-edp driver and only after that, the hpd line will be asserted. Whereas for DP, the sink can be hotplugged and unplugged anytime. The hpd line gets asserted to indicate the sink is connected and ready. Hence there is no need to wait for the hpd line to be asserted for a DP sink. Signed-off-by:
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Sankeerth Billakanti authored
The panel-edp enables the eDP panel power during probe, get_modes and pre-enable. The eDP connect and disconnect interrupts for the eDP/DP controller are directly dependent on panel power. As eDP display can be assumed as always connected, the controller driver can skip the eDP connect and disconnect interrupts. Any disruption in the link status will be indicated via the IRQ_HPD interrupts. So, the eDP controller driver can just enable the IRQ_HPD and replug interrupts. The DP controller driver still needs to enable all the interrupts. Signed-off-by:
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Dmitry Baryshkov authored
Add missing dependency on the AUX bus implementation. Fixes: c3bf8e21 ("drm/msm/dp: Add eDP support via aux_bus") Signed-off-by:
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Sankeerth Billakanti authored
This patch adds support for generic eDP sink through aux_bus. The eDP/DP controller driver should support aux transactions originating from the panel-edp driver and hence should be initialized and ready. The panel bridge supporting the panel should be ready before the bridge connector is initialized. The generic panel probe needs the controller resources to be enabled to support the aux transactions originating from the panel probe. Signed-off-by:
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Kuogee Hsieh authored
Two stages are required to setup up main link to be ready to transmit video stream. Stage 1: dp_hpd_plug_handle() perform link training to set up main link stage 2: user space framework (msm_dp_display_enable()) to enable pixel clock and transfer main link to video ready state. At current implementation, when dongle unplugged dp_hdp_unplug_handle() has to wait until stage 2 completed before it can send link down uevent to user space framework to disable pixel clock followed by tearing down main link. This introduce unnecessary latency if dongle unplugged happen after stage 1 and before stage 2. It also has possibility leave main link stay at ready state after dongle unplugged if framework does not response to link down uevent notification. This will prevent next dongle plug in from working. This scenario could possibly happen when dongle unplug while system in the middle of suspending. This patch allow unplug handle to tear down main link and notify framework link down immediately if dongle unplugged happen after stage 1 and before stage 2. With this approach, dp driver is much more resilient to any different scenarios. Also redundant both dp_connect_pending_timeout() and dp_disconnect_pending_timeout() are removed to reduce logic complexity. Changes in V2: -- return -EINVAL at msm_dp_display_enable() if not in correct state -- replace ST_CONNECT_PENDING with ST_MAINLINK_READY Fixes: 8ede2ecc ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets") Signed-off-by:
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Lv Ruyi authored
The irq_of_parse_and_map() function returns 0 on failure, and does not return an negative value. Fixes: 8ede2ecc ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets") Reported-by:
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Kuogee Hsieh authored
Current DP driver implementation, event thread is kept running after DP display is unbind. This patch fix this problem by disabling DP irq and stop event thread to exit gracefully at dp_display_unbind(). Changes in v2: -- start event thread at dp_display_bind() Changes in v3: -- disable all HDP interrupts at unbind -- replace dp_hpd_event_setup() with dp_hpd_event_thread_start() -- replace dp_hpd_event_stop() with dp_hpd_event_thread_stop() -- move init_waitqueue_head(&dp->event_q) to probe() -- move spin_lock_init(&dp->event_lock) to probe() Changes in v4: -- relocate both dp_display_bind() and dp_display_unbind() to bottom of file Changes in v5: -- cancel relocation of both dp_display_bind() and dp_display_unbind() Changes in v6: -- move empty event q to dp_event_thread_start() Changes in v7: -- call ktheread_stop() directly instead of dp_hpd_event_thread_stop() function Changes in v8: -- return error immediately if audio registration failed. Changes in v9: -- return error immediately if event thread create failed. Changes in v10: -- delete extra DRM_ERROR("failed to create DP event thread\n"); Fixes: 8ede2ecc ("drm/msm/dp: Add DP compliance tests on Snapdragon Chipsets") Signed-off-by: -
Dmitry Baryshkov authored
Since the last commit, the max_pclk_khz became constant, it's set to DP_MAX_PIXEL_CLK_KHZ and never changed afterwards. Remove it completely and use DP_MAX_PIXEL_CLK_KHZ directly. Reviewed-by:
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Dmitry Baryshkov authored
Since dp_panel_get_modes() handling for dp_mode was removed, dp_display_get_modes also doesn't change the passed dp_mode, drop the unused dp_mode variable being allocated unused and then freed. Reviewed-by:
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Dmitry Baryshkov authored
Since the commit ab205927 ("drm/msm/dp: remove mode hard-coding in case of DP CTS") the function dp_panel_get_modes() doesn't use (or fill) the dp_mode argument. Drop it completely. Reviewed-by:
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