linux-dev/drivers/gpu/drm/amd/display/dc/dml/dcn20, branch linus/master

drm/amd/display: remove DC_FP_* wrapper from dml folder

2022-04-01T03:05:54Z

FPU documentation states that developers must not use DC_FP_START/END inside dml files, but use this macro to wrap calls to FPU functions in dc folder (outside dml folder). Therefore, this patch removes DC_FP_* wrappers from dml folder and wraps calls for these FPU operations outside dml, as required. Acked-by: Christian König Reviewed-by: Rodrigo Siqueira Signed-off-by: Melissa Wen Signed-off-by: Alex Deucher

drm/amd/display: Add support for zstate during extended vblank

2022-03-25T16:40:25Z

[why] When we enter FREESYNC_STATE_VIDEO, we want to use the extra vblank portion to enter zstate if possible. [how] When we enter freesync, a full update is triggered and the new vtotal with extra lines is passed to dml in a stream update. The time gained from extra vblank lines is calculated in microseconds. We allow zstate entry if the time gained is greater than 5 ms, which is the current policy. Furthermore, an optimized value for min_dst_y_next_start is calculated and written to its register. When exiting freesync, another full update is triggered and default values are restored. Reviewed-by: Nicholas Kazlauskas Acked-by: Alex Hung Signed-off-by: Gabe Teeger Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Block zstate when more than one plane enabled

2022-03-15T18:41:28Z

[Why] Currently Z10 save/restore only covers 1 plane case. If we enter Z10 with 2 planes enabled, 1 of the 2 planes will not be restored. causing black screen. [How] Disable Zstate when more than 1 plane is enabled. Right now Z9 enable but Z10 disable is not a supported config, so we disable both. Reviewed-by: Nicholas Kazlauskas Reviewed-by: Nevenko Stupar Acked-by: Agustin Gutierrez Signed-off-by: Eric Yang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: move FPU operations from dcn21 to dml/dcn20 folder

2022-03-15T18:25:16Z

dml/dcn20_fpu file centralizes all DCN2x functions that require FPU access. Therefore, this patch moves FPU-related code from dcn21 to dcn20_fpu. These include: - dcn21_populate_dml_pipes_from_context() - dcn21_validate_bandwidth_fp() and related: - dcn21_calculate_wm(), - patch_bounding_box(), - calculate_wm_set_for_vlevel() - renaming update_bw_bounding_box() to dcn21_update_bw_bounding_box(), move to dcn20_fpu with related static function construct_low_pstate_lvl() Also, make dcn21_fast_validate_bw() public in dcn21_resource as it is called by dcn21_validate_bandwidth_fp() now in dcn20_fpu. Reuse dcn20_fpu_adjust_dppclk() in dcn21_fast_validate_bw() as it isolates the same FPU operation. Include dchubbub.h as it is required in dcn21_populate_dml_pipes_from_context() Signed-off-by: Melissa Wen Acked-by: Alan Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: move FPU-related code from dcn20 to dml folder

2022-03-15T18:25:16Z

Move parts of dcn20 code that uses FPU to dml folder. It aims to isolate FPU operations as described by series: drm/amd/display: Introduce FPU directory inside DC https://patchwork.freedesktop.org/series/93042/ This patch moves the following functions from dcn20_resource to dml/dcn20_fpu and calls of public functions in dcn20_resource are wrapped by DC_FP_START/END(): - void dcn20_populate_dml_writeback_from_context - static bool is_dtbclk_required() - static enum dcn_zstate_support_state() - void dcn20_calculate_dlg_params() - static void swizzle_to_dml_params() - int dcn20_populate_dml_pipes_from_context() - void dcn20_calculate_wm() - void dcn20_cap_soc_clocks() - void dcn20_update_bounding_box() - void dcn20_patch_bounding_box() - bool dcn20_validate_bandwidth_fp() This movement also affects dcn21/30/31, as dcn20_calculate_dlg_params() is used by them. For this reason, I included dcn20_fpu headers in dcn20_resource headers to make dcn20_calculate_dlg_params() visible to dcn21/30/31. Three new functions are created to isolate well-delimited FPU operations: - void dcn20_fpu_set_wb_arb_params(): set cli_watermark, pstate_watermark and time_per_pixel from wb_arb_params (struct mcif_arb_params), since those uses FPU operations on double types: WritebackUrgentWatermark, WritebackDRAMClockChangeWatermark, '16.0'. - void dcn20_fpu_set_wm_ranges(): set min_fill_clk_mhz and max_fill_clk_mhz involves FPU calcs on dram_speed_mts (double type); - void dcn20_fpu_adjust_dppclk(): adjust operation on RequiredDPPCLK that is a double. Signed-off-by: Melissa Wen Acked-by: Alan Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amdgpu/display: Remove t_srx_delay_us.

2022-01-25T22:54:23Z

Unused. Convert the divisions into asserts on the divisor, to debug why it is zero. The divide by zero is suspected of causing kernel panics. While I have no idea where the zero is coming from I think this patch is a positive either way. Cc: stable@vger.kernel.org Reviewed-by: Harry Wentland Signed-off-by: Bas Nieuwenhuizen Signed-off-by: Alex Deucher

drm/amd/display: Re-arrange FPU code structure for dcn2x

2021-10-06T19:49:24Z

[Why] Current FPU code for DCN2x is located under dml/dcn2x. This is not aligned with DC's general source tree structure. [How] Move FPU code for DCN2x to dml/dcn20. Reviewed-by: Rodrigo Siqueira Acked-by: Solomon Chiu Signed-off-by: Qingqing Zhuo Signed-off-by: Alex Deucher

drm/amd/display: Fix rest of pass-by-value structs in DML

2021-09-23T19:17:30Z

Passing structs adds a lot of overhead. We don't ever want to pass anything bigger than primitives by value. This patch fixes these Coverity IDs: Addresses-Coverity-ID: 1424031: ("Big parameter passed by value") Addresses-Coverity-ID: 1424055: ("Big parameter passed by value") Addresses-Coverity-ID: 1424072: ("Big parameter passed by value") Addresses-Coverity-ID: 1423779: ("Big parameter passed by value") Signed-off-by: Harry Wentland Cc: Nick Desaulniers Cc: Linus Torvalds Cc: amd-gfx@lists.freedesktop.org Cc: Linux Kernel Mailing List Cc: Arnd Bergmann Cc: Leo Li Cc: Alex Deucher Cc: Christian König Cc: Xinhui Pan Cc: Nathan Chancellor Cc: Guenter Roeck Cc: llvm@lists.linux.dev Acked-by: Christian König Build-tested-by: Nathan Chancellor Reviewed-by: Leo Li Signed-off-by: Alex Deucher

drm/amd/display: Pass all structs in display_rq_dlg_helpers by pointer

2021-09-23T19:17:29Z

Passing structs adds a lot of overhead. We don't ever want to pass anything bigger than primitives by value. This patch fixes these Coverity IDs: Addresses-Coverity-ID: 1423868: ("Big parameter passed by value") Addresses-Coverity-ID: 1423870: ("Big parameter passed by value") Signed-off-by: Harry Wentland Cc: Nick Desaulniers Cc: Linus Torvalds Cc: amd-gfx@lists.freedesktop.org Cc: Linux Kernel Mailing List Cc: Arnd Bergmann Cc: Leo Li Cc: Alex Deucher Cc: Christian König Cc: Xinhui Pan Cc: Nathan Chancellor Cc: Guenter Roeck Cc: llvm@lists.linux.dev Acked-by: Christian König Build-tested-by: Nathan Chancellor Reviewed-by: Leo Li Signed-off-by: Alex Deucher

drm/amd/display: Pass display_pipe_params_st as const in DML

2021-09-23T19:17:29Z

[Why] This neither needs to be on the stack nor passed by value to each function call. In fact, when building with clang it seems to break the Linux's default 1024 byte stack frame limit. [How] We can simply pass this as a const pointer. This patch fixes these Coverity IDs Addresses-Coverity-ID: 1424031: ("Big parameter passed by value") Addresses-Coverity-ID: 1423970: ("Big parameter passed by value") Addresses-Coverity-ID: 1423941: ("Big parameter passed by value") Addresses-Coverity-ID: 1451742: ("Big parameter passed by value") Addresses-Coverity-ID: 1451887: ("Big parameter passed by value") Addresses-Coverity-ID: 1454146: ("Big parameter passed by value") Addresses-Coverity-ID: 1454152: ("Big parameter passed by value") Addresses-Coverity-ID: 1454413: ("Big parameter passed by value") Addresses-Coverity-ID: 1466144: ("Big parameter passed by value") Addresses-Coverity-ID: 1487237: ("Big parameter passed by value") Signed-off-by: Harry Wentland Fixes: 3fe617ccafd6 ("Enable '-Werror' by default for all kernel builds") Cc: Nick Desaulniers Cc: Linus Torvalds Cc: amd-gfx@lists.freedesktop.org Cc: Linux Kernel Mailing List Cc: Arnd Bergmann Cc: Leo Li Cc: Alex Deucher Cc: Christian König Cc: Xinhui Pan Cc: Nathan Chancellor Cc: Guenter Roeck Cc: llvm@lists.linux.dev Acked-by: Christian König Build-tested-by: Nathan Chancellor Reviewed-by: Leo Li Signed-off-by: Alex Deucher