diff options
| author | Yihan Zhu <Yihan.Zhu@amd.com> | 2025-08-13 16:05:10 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-08-27 13:57:50 -0400 |
| commit | f382e2d0faad0e0d73f626dbd71f2a4fce03975b (patch) | |
| tree | 1874a34a9068ca88dd82c88c9609f5166b81c0d4 /drivers/gpu | |
| parent | drm/amd/display: Incorrect 'not' operator usage (diff) | |
| download | linux-f382e2d0faad0e0d73f626dbd71f2a4fce03975b.tar.gz linux-f382e2d0faad0e0d73f626dbd71f2a4fce03975b.zip | |
drm/amd/display: wait for otg update pending latch before clock optimization
[WHY & HOW]
OTG pending update unlatched will cause system fail, wait OTG fully disabled to
avoid this error.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Yihan Zhu <Yihan.Zhu@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
4 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c index ec4e80e5b6eb..d82b1cb467f4 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_hw_sequencer.c @@ -1177,6 +1177,8 @@ void hwss_wait_for_odm_update_pending_complete(struct dc *dc, struct dc_state *c tg = otg_master->stream_res.tg; if (tg->funcs->wait_odm_doublebuffer_pending_clear) tg->funcs->wait_odm_doublebuffer_pending_clear(tg); + if (tg->funcs->wait_otg_disable) + tg->funcs->wait_otg_disable(tg); } /* ODM update may require to reprogram blank pattern for each OPP */ diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h index 267ace4eef8a..f2de2cf23859 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h @@ -374,6 +374,7 @@ struct timing_generator_funcs { void (*wait_drr_doublebuffer_pending_clear)(struct timing_generator *tg); void (*set_long_vtotal)(struct timing_generator *optc, const struct long_vtotal_params *params); void (*wait_odm_doublebuffer_pending_clear)(struct timing_generator *tg); + void (*wait_otg_disable)(struct timing_generator *optc); bool (*get_optc_double_buffer_pending)(struct timing_generator *tg); bool (*get_otg_double_buffer_pending)(struct timing_generator *tg); bool (*get_pipe_update_pending)(struct timing_generator *tg); diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h index d159e3ed3bb3..ead92ad78a23 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn32/dcn32_optc.h @@ -62,6 +62,7 @@ SF(OTG0_OTG_CONTROL, OTG_DISABLE_POINT_CNTL, mask_sh),\ SF(OTG0_OTG_CONTROL, OTG_FIELD_NUMBER_CNTL, mask_sh),\ SF(OTG0_OTG_CONTROL, OTG_OUT_MUX, mask_sh),\ + SF(OTG0_OTG_CONTROL, OTG_CURRENT_MASTER_EN_STATE, mask_sh),\ SF(OTG0_OTG_STEREO_CONTROL, OTG_STEREO_EN, mask_sh),\ SF(OTG0_OTG_STEREO_CONTROL, OTG_STEREO_SYNC_OUTPUT_LINE_NUM, mask_sh),\ SF(OTG0_OTG_STEREO_CONTROL, OTG_STEREO_SYNC_OUTPUT_POLARITY, mask_sh),\ diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c index 72bff94cb57d..52d5ea98c86b 100644 --- a/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c +++ b/drivers/gpu/drm/amd/display/dc/optc/dcn35/dcn35_optc.c @@ -162,6 +162,8 @@ static bool optc35_disable_crtc(struct timing_generator *optc) REG_WAIT(OTG_CLOCK_CONTROL, OTG_BUSY, 0, 1, 100000); + REG_WAIT(OTG_CONTROL, OTG_CURRENT_MASTER_EN_STATE, 0, 1, 100000); + optc1_clear_optc_underflow(optc); return true; @@ -428,6 +430,21 @@ static void optc35_set_long_vtotal( } } +static void optc35_wait_otg_disable(struct timing_generator *optc) +{ + struct optc *optc1; + uint32_t is_master_en; + + if (!optc || !optc->ctx) + return; + + optc1 = DCN10TG_FROM_TG(optc); + + REG_GET(OTG_CONTROL, OTG_MASTER_EN, &is_master_en); + if (!is_master_en) + REG_WAIT(OTG_CLOCK_CONTROL, OTG_CURRENT_MASTER_EN_STATE, 0, 1, 100000); +} + static const struct timing_generator_funcs dcn35_tg_funcs = { .validate_timing = optc1_validate_timing, .program_timing = optc1_program_timing, @@ -479,6 +496,7 @@ static const struct timing_generator_funcs dcn35_tg_funcs = { .set_odm_bypass = optc32_set_odm_bypass, .set_odm_combine = optc35_set_odm_combine, .get_optc_source = optc2_get_optc_source, + .wait_otg_disable = optc35_wait_otg_disable, .set_h_timing_div_manual_mode = optc32_set_h_timing_div_manual_mode, .set_out_mux = optc3_set_out_mux, .set_drr_trigger_window = optc3_set_drr_trigger_window, |