diff options
| author | Sung Lee <sung.lee@amd.com> | 2020-03-25 14:44:25 -0400 |
|---|---|---|
| committer | Flora Cui <flora.cui@amd.com> | 2020-04-24 15:15:58 +0800 |
| commit | ffff00ff47dab579efcc48bdc945cfad5e77a8ed (patch) | |
| tree | ad7255f940db3c0f7a72d3c97dd4a4e4d6a90b5e | |
| parent | 2e2e6bb1d3623c025b7787b907a263d3eafbcd24 (diff) | |
drm/amd/display: Cap certain DML values for Low Pix Clk on DCN2.1
[WHY]
In certain conditions with low pixel clock, some values in DML may go
past the max due to margining for latency hiding. This causes assertions
to get hit.
[HOW]
If the pixel clock is low and some values are high, cap it to the max.
Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dml/dcn21/display_rq_dlg_calc_21.c | 12 |
1 files changed, 10 insertions, 2 deletions
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 dea7940fca3e..893837cf80e4 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 @@ -1491,13 +1491,21 @@ static void dml_rq_dlg_get_dlg_params( disp_dlg_regs->refcyc_per_pte_group_vblank_l = (unsigned int) (dst_y_per_row_vblank * (double) htotal * ref_freq_to_pix_freq / (double) dpte_groups_per_row_ub_l); - ASSERT(disp_dlg_regs->refcyc_per_pte_group_vblank_l < (unsigned int)dml_pow(2, 13)); + if ((refclk_freq_in_mhz / ref_freq_to_pix_freq < 28) && + disp_dlg_regs->refcyc_per_pte_group_vblank_l >= (unsigned int)dml_pow(2, 13)) + disp_dlg_regs->refcyc_per_pte_group_vblank_l = (1 << 13) - 1; + else + ASSERT(disp_dlg_regs->refcyc_per_pte_group_vblank_l < (unsigned int)dml_pow(2, 13)); if (dual_plane) { disp_dlg_regs->refcyc_per_pte_group_vblank_c = (unsigned int) (dst_y_per_row_vblank * (double) htotal * ref_freq_to_pix_freq / (double) dpte_groups_per_row_ub_c); - ASSERT(disp_dlg_regs->refcyc_per_pte_group_vblank_c + if ((refclk_freq_in_mhz / ref_freq_to_pix_freq < 28) && + disp_dlg_regs->refcyc_per_pte_group_vblank_c >= (unsigned int)dml_pow(2, 13)) + disp_dlg_regs->refcyc_per_pte_group_vblank_c = (1 << 13) - 1; + else + ASSERT(disp_dlg_regs->refcyc_per_pte_group_vblank_c < (unsigned int)dml_pow(2, 13)); } |