On 2022-01-22 21:38, Bas Nieuwenhuizen wrote:
> 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.
>
> Signed-off-by: Bas Nieuwenhuizen <b...@basnieuwenhuizen.nl>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Harry
> ---
> drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calcs.c | 1 -
> .../gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c | 2 --
> .../drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c | 2 --
> .../gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c | 2 --
> .../gpu/drm/amd/display/dc/dml/dcn30/display_rq_dlg_calc_30.c | 2 --
> drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h | 1 -
> drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_helpers.c | 3 ---
> drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c | 4 ----
> 8 files changed, 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calcs.c
> b/drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calcs.c
> index ec19678a0702..e447c74be713 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calcs.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calcs.c
> @@ -503,7 +503,6 @@ static void dcn_bw_calc_rq_dlg_ttu(
> //input[in_idx].dout.output_standard;
>
> /*todo: soc->sr_enter_plus_exit_time??*/
> - dlg_sys_param->t_srx_delay_us = dc->dcn_ip->dcfclk_cstate_latency /
> v->dcf_clk_deep_sleep;
>
> dml1_rq_dlg_get_rq_params(dml, rq_param, &input->pipe.src);
> dml1_extract_rq_regs(dml, rq_regs, rq_param);
> diff --git
> a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c
> b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c
> index 246071c72f6b..548cdef8a8ad 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20.c
> @@ -1576,8 +1576,6 @@ void dml20_rq_dlg_get_dlg_reg(struct display_mode_lib
> *mode_lib,
> dlg_sys_param.total_flip_bytes =
> get_total_immediate_flip_bytes(mode_lib,
> e2e_pipe_param,
> num_pipes);
> - dlg_sys_param.t_srx_delay_us = mode_lib->ip.dcfclk_cstate_latency
> - / dlg_sys_param.deepsleep_dcfclk_mhz; // TODO:
> Deprecated
>
> print__dlg_sys_params_st(mode_lib, &dlg_sys_param);
>
> diff --git
> a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c
> b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c
> index 015e7f2c0b16..0fc9f3e3ffae 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/display_rq_dlg_calc_20v2.c
> @@ -1577,8 +1577,6 @@ void dml20v2_rq_dlg_get_dlg_reg(struct display_mode_lib
> *mode_lib,
> dlg_sys_param.total_flip_bytes =
> get_total_immediate_flip_bytes(mode_lib,
> e2e_pipe_param,
> num_pipes);
> - dlg_sys_param.t_srx_delay_us = mode_lib->ip.dcfclk_cstate_latency
> - / dlg_sys_param.deepsleep_dcfclk_mhz; // TODO:
> Deprecated
>
> print__dlg_sys_params_st(mode_lib, &dlg_sys_param);
>
> diff --git
> a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c
> b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c
> index 8bc27de4c104..618f4b682ab1 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c
> @@ -1688,8 +1688,6 @@ void dml21_rq_dlg_get_dlg_reg(
> mode_lib,
> e2e_pipe_param,
> num_pipes);
> - dlg_sys_param.t_srx_delay_us = mode_lib->ip.dcfclk_cstate_latency
> - / dlg_sys_param.deepsleep_dcfclk_mhz; // TODO:
> Deprecated
>
> print__dlg_sys_params_st(mode_lib, &dlg_sys_param);
>
> diff --git
> a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_rq_dlg_calc_30.c
> b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_rq_dlg_calc_30.c
> index aef854270054..747167083dea 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_rq_dlg_calc_30.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_rq_dlg_calc_30.c
> @@ -1858,8 +1858,6 @@ void dml30_rq_dlg_get_dlg_reg(struct display_mode_lib
> *mode_lib,
> dlg_sys_param.total_flip_bytes =
> get_total_immediate_flip_bytes(mode_lib,
> e2e_pipe_param,
> num_pipes);
> - dlg_sys_param.t_srx_delay_us = mode_lib->ip.dcfclk_cstate_latency
> - / dlg_sys_param.deepsleep_dcfclk_mhz; // TODO: Deprecated
>
> print__dlg_sys_params_st(mode_lib, &dlg_sys_param);
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h
> b/drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h
> index d46a2733024c..8f9f1d607f7c 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h
> +++ b/drivers/gpu/drm/amd/display/dc/dml/display_mode_structs.h
> @@ -546,7 +546,6 @@ struct _vcs_dpi_display_dlg_sys_params_st {
> double t_sr_wm_us;
> double t_extra_us;
> double mem_trip_us;
> - double t_srx_delay_us;
> double deepsleep_dcfclk_mhz;
> double total_flip_bw;
> unsigned int total_flip_bytes;
> diff --git a/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_helpers.c
> b/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_helpers.c
> index 71ea503cb32f..412e75eb4704 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_helpers.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/display_rq_dlg_helpers.c
> @@ -141,9 +141,6 @@ void print__dlg_sys_params_st(struct display_mode_lib
> *mode_lib, const struct _v
> dml_print("DML_RQ_DLG_CALC: t_urg_wm_us = %3.2f\n",
> dlg_sys_param->t_urg_wm_us);
> dml_print("DML_RQ_DLG_CALC: t_sr_wm_us = %3.2f\n",
> dlg_sys_param->t_sr_wm_us);
> dml_print("DML_RQ_DLG_CALC: t_extra_us = %3.2f\n",
> dlg_sys_param->t_extra_us);
> - dml_print(
> - "DML_RQ_DLG_CALC: t_srx_delay_us = %3.2f\n",
> - dlg_sys_param->t_srx_delay_us);
> dml_print(
> "DML_RQ_DLG_CALC: deepsleep_dcfclk_mhz = %3.2f\n",
> dlg_sys_param->deepsleep_dcfclk_mhz);
> diff --git a/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
> b/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
> index 59dc2c5b58dd..3df559c591f8 100644
> --- a/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
> +++ b/drivers/gpu/drm/amd/display/dc/dml/dml1_display_rq_dlg_calc.c
> @@ -1331,10 +1331,6 @@ void dml1_rq_dlg_get_dlg_params(
> if (dual_plane)
> DTRACE("DLG: %s: swath_height_c = %d", __func__,
> swath_height_c);
>
> - DTRACE(
> - "DLG: %s: t_srx_delay_us = %3.2f",
> - __func__,
> - (double) dlg_sys_param->t_srx_delay_us);
> DTRACE("DLG: %s: line_time_in_us = %3.2f", __func__, (double)
> line_time_in_us);
> DTRACE("DLG: %s: vupdate_offset = %d", __func__, vupdate_offset);
> DTRACE("DLG: %s: vupdate_width = %d", __func__, vupdate_width);
