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drm/amd/display: Toggle for Disable Force Pstate Allow on Disable

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[Why & How]
In theory, driver should be able to support disabling force pstate allow
after hardware release however this behavior is not tested yet.
Introducing a new toggle to disable the force on the fly.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Ryan Seto <ryanseto@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ryan Seto
2025-07-24 14:57:52 -04:00
committed by Alex Deucher
parent e63e9f8b3d
commit 20ea30a793
3 changed files with 22 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@@ -1073,6 +1073,7 @@ struct dc_debug_options {
unsigned int force_mall_ss_num_ways;
bool alloc_extra_way_for_cursor;
uint32_t subvp_extra_lines;
bool disable_force_pstate_allow_on_hw_release;
bool force_usr_allow;
/* uses value at boot and disables switch */
bool disable_dtb_ref_clk_switch;

32
drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
View File

@@ -1621,20 +1621,28 @@ void dcn401_unblank_stream(struct pipe_ctx *pipe_ctx,
void dcn401_hardware_release(struct dc *dc)
{
dc_dmub_srv_fams2_update_config(dc, dc->current_state, false);
if (!dc->debug.disable_force_pstate_allow_on_hw_release) {
dc_dmub_srv_fams2_update_config(dc, dc->current_state, false);
/* If pstate unsupported, or still supported
* by firmware, force it supported by dcn
*/
if (dc->current_state) {
if ((!dc->clk_mgr->clks.p_state_change_support ||
dc->current_state->bw_ctx.bw.dcn.fams2_global_config.features.bits.enable) &&
dc->res_pool->hubbub->funcs->force_pstate_change_control)
dc->res_pool->hubbub->funcs->force_pstate_change_control(
dc->res_pool->hubbub, true, true);
/* If pstate unsupported, or still supported
* by firmware, force it supported by dcn
*/
if (dc->current_state) {
if ((!dc->clk_mgr->clks.p_state_change_support ||
dc->current_state->bw_ctx.bw.dcn.fams2_global_config.features.bits.enable) &&
dc->res_pool->hubbub->funcs->force_pstate_change_control)
dc->res_pool->hubbub->funcs->force_pstate_change_control(
dc->res_pool->hubbub, true, true);
dc->current_state->bw_ctx.bw.dcn.clk.p_state_change_support = true;
dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true);
dc->current_state->bw_ctx.bw.dcn.clk.p_state_change_support = true;
dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true);
}
} else {
if (dc->current_state) {
dc->clk_mgr->clks.p_state_change_support = false;
dc->clk_mgr->funcs->update_clocks(dc->clk_mgr, dc->current_state, true);
}
dc_dmub_srv_fams2_update_config(dc, dc->current_state, false);
}
}

1
drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c
View File

@@ -708,6 +708,7 @@ static const struct dc_debug_options debug_defaults_drv = {
},
.use_max_lb = true,
.force_disable_subvp = false,
.disable_force_pstate_allow_on_hw_release = false,
.exit_idle_opt_for_cursor_updates = true,
.using_dml2 = true,
.using_dml21 = true,