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Message-Id: <20221001043354.22608-1-rdunlap@infradead.org> Date: Fri, 30 Sep 2022 21:33:54 -0700 From: Randy Dunlap <rdunlap@...radead.org> To: linux-kernel@...r.kernel.org Cc: Randy Dunlap <rdunlap@...radead.org>, kernel test robot <lkp@...el.com>, George Shen <george.shen@....com>, Alvin Lee <alvin.lee2@....com>, Nevenko Stupar <Nevenko.Stupar@....com>, Harry Wentland <harry.wentland@....com>, Leo Li <sunpeng.li@....com>, Rodrigo Siqueira <Rodrigo.Siqueira@....com>, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com>, "Pan, Xinhui" <Xinhui.Pan@....com> Subject: [PATCH] drm: amd: clean up dcn32_fpu.c kernel-doc Rectify multiple kernel-doc warnings in dcn32_fpu.c. E.g.: drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:247: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Finds dummy_latency_index when MCLK switching using firmware based drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:484: warning: Function parameter or member 'phantom_stream' not described in 'dcn32_set_phantom_stream_timing' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:601: warning: Function parameter or member 'dc' not described in 'dcn32_assign_subvp_pipe' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:601: warning: Function parameter or member 'context' not described in 'dcn32_assign_subvp_pipe' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:601: warning: Function parameter or member 'index' not described in 'dcn32_assign_subvp_pipe' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:2140: warning: Function parameter or member 'dc' not described in 'dcn32_update_bw_bounding_box_fpu' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:2140: warning: Function parameter or member 'bw_params' not described in 'dcn32_update_bw_bounding_box_fpu' drivers/gpu/drm/amd/amdgpu/../display/dc/dml/dcn32/dcn32_fpu.c:2140: warning: expecting prototype for dcn32_update_bw_bounding_box(). Prototype was for dcn32_update_bw_bounding_box_fpu() instead Reported-by: kernel test robot <lkp@...el.com> Signed-off-by: Randy Dunlap <rdunlap@...radead.org> Cc: George Shen <george.shen@....com> Cc: Alvin Lee <alvin.lee2@....com> Cc: Nevenko Stupar <Nevenko.Stupar@....com> Cc: Harry Wentland <harry.wentland@....com> Cc: Leo Li <sunpeng.li@....com> Cc: Rodrigo Siqueira <Rodrigo.Siqueira@....com> Cc: amd-gfx@...ts.freedesktop.org Cc: dri-devel@...ts.freedesktop.org Cc: Alex Deucher <alexander.deucher@....com> Cc: Christian König <christian.koenig@....com> Cc: "Pan, Xinhui" <Xinhui.Pan@....com> --- drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 116 ++++------ 1 file changed, 49 insertions(+), 67 deletions(-) --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c @@ -243,7 +243,7 @@ void dcn32_build_wm_range_table_fpu(stru clk_mgr->base.bw_params->wm_table.nv_entries[WM_D].pmfw_breakdown.max_uclk = 0xFFFF; } -/** +/* * Finds dummy_latency_index when MCLK switching using firmware based * vblank stretch is enabled. This function will iterate through the * table of dummy pstate latencies until the lowest value that allows @@ -290,15 +290,14 @@ int dcn32_find_dummy_latency_index_for_f /** * dcn32_helper_populate_phantom_dlg_params - Get DLG params for phantom pipes * and populate pipe_ctx with those params. - * - * This function must be called AFTER the phantom pipes are added to context - * and run through DML (so that the DLG params for the phantom pipes can be - * populated), and BEFORE we program the timing for the phantom pipes. - * * @dc: [in] current dc state * @context: [in] new dc state * @pipes: [in] DML pipe params array * @pipe_cnt: [in] DML pipe count + * + * This function must be called AFTER the phantom pipes are added to context + * and run through DML (so that the DLG params for the phantom pipes can be + * populated), and BEFORE we program the timing for the phantom pipes. */ void dcn32_helper_populate_phantom_dlg_params(struct dc *dc, struct dc_state *context, @@ -331,8 +330,9 @@ void dcn32_helper_populate_phantom_dlg_p } /** - * ******************************************************************************************* - * dcn32_predict_pipe_split: Predict if pipe split will occur for a given DML pipe + * dcn32_predict_pipe_split - Predict if pipe split will occur for a given DML pipe + * @context: [in] New DC state to be programmed + * @pipe_e2e: [in] DML pipe end to end context * * This function takes in a DML pipe (pipe_e2e) and predicts if pipe split is required (both * ODM and MPC). For pipe split, ODM combine is determined by the ODM mode, and MPC combine is @@ -343,12 +343,7 @@ void dcn32_helper_populate_phantom_dlg_p * - MPC combine is only chosen if there is no ODM combine requirements / policy in place, and * MPC is required * - * @param [in]: context: New DC state to be programmed - * @param [in]: pipe_e2e: DML pipe end to end context - * - * @return: Number of splits expected (1 for 2:1 split, 3 for 4:1 split, 0 for no splits). - * - * ******************************************************************************************* + * Return: Number of splits expected (1 for 2:1 split, 3 for 4:1 split, 0 for no splits). */ uint8_t dcn32_predict_pipe_split(struct dc_state *context, display_e2e_pipe_params_st *pipe_e2e) @@ -504,7 +499,14 @@ void insert_entry_into_table_sorted(stru } /** - * dcn32_set_phantom_stream_timing: Set timing params for the phantom stream + * dcn32_set_phantom_stream_timing - Set timing params for the phantom stream + * @dc: current dc state + * @context: new dc state + * @ref_pipe: Main pipe for the phantom stream + * @phantom_stream: target phantom stream state + * @pipes: DML pipe params + * @pipe_cnt: number of DML pipes + * @dc_pipe_idx: DC pipe index for the main pipe (i.e. ref_pipe) * * Set timing params of the phantom stream based on calculated output from DML. * This function first gets the DML pipe index using the DC pipe index, then @@ -517,13 +519,6 @@ void insert_entry_into_table_sorted(stru * that separately. * * - Set phantom backporch = vstartup of main pipe - * - * @dc: current dc state - * @context: new dc state - * @ref_pipe: Main pipe for the phantom stream - * @pipes: DML pipe params - * @pipe_cnt: number of DML pipes - * @dc_pipe_idx: DC pipe index for the main pipe (i.e. ref_pipe) */ void dcn32_set_phantom_stream_timing(struct dc *dc, struct dc_state *context, @@ -592,16 +587,14 @@ void dcn32_set_phantom_stream_timing(str } /** - * dcn32_get_num_free_pipes: Calculate number of free pipes + * dcn32_get_num_free_pipes - Calculate number of free pipes + * @dc: current dc state + * @context: new dc state * * This function assumes that a "used" pipe is a pipe that has * both a stream and a plane assigned to it. * - * @dc: current dc state - * @context: new dc state - * - * Return: - * Number of free pipes available in the context + * Return: Number of free pipes available in the context */ static unsigned int dcn32_get_num_free_pipes(struct dc *dc, struct dc_state *context) { @@ -625,7 +618,10 @@ static unsigned int dcn32_get_num_free_p } /** - * dcn32_assign_subvp_pipe: Function to decide which pipe will use Sub-VP. + * dcn32_assign_subvp_pipe - Function to decide which pipe will use Sub-VP. + * @dc: current dc state + * @context: new dc state + * @index: [out] dc pipe index for the pipe chosen to have phantom pipes assigned * * We enter this function if we are Sub-VP capable (i.e. enough pipes available) * and regular P-State switching (i.e. VACTIVE/VBLANK) is not supported, or if @@ -639,12 +635,7 @@ static unsigned int dcn32_get_num_free_p * for determining which should be the SubVP pipe (need a way to determine if a pipe / plane doesn't * support MCLK switching naturally [i.e. ACTIVE or VBLANK]). * - * @param dc: current dc state - * @param context: new dc state - * @param index: [out] dc pipe index for the pipe chosen to have phantom pipes assigned - * - * Return: - * True if a valid pipe assignment was found for Sub-VP. Otherwise false. + * Return: True if a valid pipe assignment was found for Sub-VP. Otherwise false. */ static bool dcn32_assign_subvp_pipe(struct dc *dc, struct dc_state *context, @@ -711,7 +702,9 @@ static bool dcn32_assign_subvp_pipe(stru } /** - * dcn32_enough_pipes_for_subvp: Function to check if there are "enough" pipes for SubVP. + * dcn32_enough_pipes_for_subvp - Function to check if there are "enough" pipes for SubVP. + * @dc: current dc state + * @context: new dc state * * This function returns true if there are enough free pipes * to create the required phantom pipes for any given stream @@ -723,9 +716,6 @@ static bool dcn32_assign_subvp_pipe(stru * pipe which can be used as the phantom pipe for the non pipe * split pipe. * - * @dc: current dc state - * @context: new dc state - * * Return: * True if there are enough free pipes to assign phantom pipes to at least one * stream that does not already have phantom pipes assigned. Otherwise false. @@ -764,7 +754,9 @@ static bool dcn32_enough_pipes_for_subvp } /** - * subvp_subvp_schedulable: Determine if SubVP + SubVP config is schedulable + * subvp_subvp_schedulable - Determine if SubVP + SubVP config is schedulable + * @dc: current dc state + * @context: new dc state * * High level algorithm: * 1. Find longest microschedule length (in us) between the two SubVP pipes @@ -772,11 +764,7 @@ static bool dcn32_enough_pipes_for_subvp * pipes still allows for the maximum microschedule to fit in the active * region for both pipes. * - * @dc: current dc state - * @context: new dc state - * - * Return: - * bool - True if the SubVP + SubVP config is schedulable, false otherwise + * Return: True if the SubVP + SubVP config is schedulable, false otherwise */ static bool subvp_subvp_schedulable(struct dc *dc, struct dc_state *context) { @@ -836,7 +824,10 @@ static bool subvp_subvp_schedulable(stru } /** - * subvp_drr_schedulable: Determine if SubVP + DRR config is schedulable + * subvp_drr_schedulable - Determine if SubVP + DRR config is schedulable + * @dc: current dc state + * @context: new dc state + * @drr_pipe: DRR pipe_ctx for the SubVP + DRR config * * High level algorithm: * 1. Get timing for SubVP pipe, phantom pipe, and DRR pipe @@ -845,12 +836,7 @@ static bool subvp_subvp_schedulable(stru * 3.If (SubVP Active - Prefetch > Stretched DRR frame + max(MALL region, Stretched DRR frame)) * then report the configuration as supported * - * @dc: current dc state - * @context: new dc state - * @drr_pipe: DRR pipe_ctx for the SubVP + DRR config - * - * Return: - * bool - True if the SubVP + DRR config is schedulable, false otherwise + * Return: True if the SubVP + DRR config is schedulable, false otherwise */ static bool subvp_drr_schedulable(struct dc *dc, struct dc_state *context, struct pipe_ctx *drr_pipe) { @@ -914,7 +900,9 @@ static bool subvp_drr_schedulable(struct /** - * subvp_vblank_schedulable: Determine if SubVP + VBLANK config is schedulable + * subvp_vblank_schedulable - Determine if SubVP + VBLANK config is schedulable + * @dc: current dc state + * @context: new dc state * * High level algorithm: * 1. Get timing for SubVP pipe, phantom pipe, and VBLANK pipe @@ -922,11 +910,7 @@ static bool subvp_drr_schedulable(struct * then report the configuration as supported * 3. If the VBLANK display is DRR, then take the DRR static schedulability path * - * @dc: current dc state - * @context: new dc state - * - * Return: - * bool - True if the SubVP + VBLANK/DRR config is schedulable, false otherwise + * Return: True if the SubVP + VBLANK/DRR config is schedulable, false otherwise */ static bool subvp_vblank_schedulable(struct dc *dc, struct dc_state *context) { @@ -1003,20 +987,18 @@ static bool subvp_vblank_schedulable(str } /** - * subvp_validate_static_schedulability: Check which SubVP case is calculated and handle - * static analysis based on the case. + * subvp_validate_static_schedulability - Check which SubVP case is calculated + * and handle static analysis based on the case. + * @dc: current dc state + * @context: new dc state + * @vlevel: Voltage level calculated by DML * * Three cases: * 1. SubVP + SubVP * 2. SubVP + VBLANK (DRR checked internally) * 3. SubVP + VACTIVE (currently unsupported) * - * @dc: current dc state - * @context: new dc state - * @vlevel: Voltage level calculated by DML - * - * Return: - * bool - True if statically schedulable, false otherwise + * Return: True if statically schedulable, false otherwise */ static bool subvp_validate_static_schedulability(struct dc *dc, struct dc_state *context, @@ -2275,7 +2257,7 @@ static int build_synthetic_soc_states(st return 0; } -/** +/* * dcn32_update_bw_bounding_box * * This would override some dcn3_2 ip_or_soc initial parameters hardcoded from
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