linux-dev/drivers/gpu/drm/amd/display/dc/dcn321, branch master

drm/amd/display: Enforce minimum prefetch time for low memclk on DCN32

2022-11-09T23:04:13Z

[WHY?] Data return times when using lowest memclk can be <= 60us, which can cause underflow on high bandwidth displays with a workload. [HOW?] Enforce a minimum prefetch time during validation for low memclk modes. Reviewed-by: Jun Lei Acked-by: Alan Liu Signed-off-by: Dillon Varone Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: clean up one inconsistent indenting

2022-10-06T16:04:49Z

clean up one inconsistent indenting Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2238 Reported-by: Abaci Robot Signed-off-by: Yang Li Signed-off-by: Alex Deucher

drm/amd/display: Update DCN321 hook that deals with pipe aquire

2022-10-06T16:01:44Z

DCN provides a hook to check if we can have a new pipe allocation based on some DC constraints. If the current configuration supports the new pipe request, DC updates its context; otherwise, it will keep the same configuration. This behavior is similar across multiple ASICs, and for this reason, we reused DCN20 on DCN321. However, this DCN32x has some peculiarities which require its function to avoid weird pipe split issues. This commit update this issue by using dcn32_acquire_idle_pipe_for_head_pipe_in_layer instead of dcn20_acquire_idle_pipe_for_layer. Reviewed-by: Aurabindo Pillai Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: Drop unused code for DCN32/321

2022-10-06T16:01:35Z

Under DCN32/321 we identified some code paths that DC never executes. This commit removes those unused codes to avoid distractions when debugging issues. Reviewed-by: Aurabindo Pillai Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: Fix various dynamic ODM transitions on DCN32

2022-09-29T13:41:45Z

[Why&How] Several transitions were fixed that will allow Dynamic ODM and MPO transitions to be supported on DCN32. 1) Due to resource limitations, in certain scenarios that require an MPO plane to be split, the features cannot be combined with the current policy. This is due to unsafe transitions being required (OPP instance per MPCC being switched on active pipe is not supported by DCN), to support the split plane with ODM active as it moves across the viewport. Dynamic ODM will now be disabled when MPO is required. 2) When exiting MPO and re-entering ODM, DC assigns an inactive pipe for the next ODM pipe, which under previous power gating policy would result in programming a gated DSC HW block. New policy dynamically gates/un-gates DSC blocks when Dynamic ODM is active to support transitions on DCN32 only. 3) Entry and exit from 3 plane MPO and Dynamic ODM requires a minimal transition so that all pipes which require their MPCC OPP instance to be changed have a full frame to be disabled before reprogramming. To solve this, the Dynamic ODM policy now utilizes minimal state transitions when entering or exiting 3 plane scenarios. 4) Various fixes to DCN32 pipe merge/split algorithm to support Dynamic ODM and MPO transitions. In summary, this commit fixes various transitions to support ODM->MPO and MPO->ODM. Reviewed-by: Martin Leung Reviewed-by: Jun Lei Acked-by: Jasdeep Dhillon Signed-off-by: Dillon Varone Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add debug option for allocating extra way for cursor

2022-09-19T19:12:31Z

[Why and How] - Add a debug option for allocating extra way for cursor - Remove usage of cache_cursor_addr since it's not gaurenteed to be populated - Include cursor size in MALL calculation if it exceeds the DCN cursor buffer size (and don't need extra way for cursor) Reviewed-by: Aurabindo Pillai Acked-by: Wayne Lin Signed-off-by: Alvin Lee Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Remove some unused definitions from DCN32/321

2022-09-19T19:08:43Z

[Why&How] After reg offset initialization was switched to runtime rather than compile time, some of the defintions are not needed anymore and can be removed. Acked-by: Wayne Lin Signed-off-by: Aurabindo Pillai Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: clean up some inconsistent indentings

2022-09-19T19:08:00Z

clean up some inconsistent indentings Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2180 Reported-by: Abaci Robot Signed-off-by: Yang Li Signed-off-by: Alex Deucher

drm/amd/display: Fix register definitions for DCN32/321

2022-09-13T18:33:00Z

[Why & How] Fix the instatiation sequence for MPC registers and add a few other missing register definitions that were ommited erroneously when copying them over to enable runtime initialization of reigster offsets for DCN32/321 Tested-by: Daniel Wheeler Reviewed-by: Rodrigo Siqueira Signed-off-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: add workaround for subvp cursor corruption for DCN32/321

2022-09-13T18:33:00Z

[Why&How] Kernel does not have a means to tell the userspace to use software cursor. Due to lack of this functionality, reducing the max cursor size is the only way to ensure that power savings of Subview port feature is utilized for asics that support it. The workaround could be removed after cursor caching is fixed while a subviewport config is active. Tested-by: Daniel Wheeler Reviewed-by: Alvin Lee Acked-by: Pavle Kotarac Signed-off-by: Aurabindo Pillai Signed-off-by: Alex Deucher