void dcn10_verify_allow_pstate_change_high(struct dc *dc)
{
+ struct hubbub *hubbub = dc->res_pool->hubbub;
static bool should_log_hw_state; /* prevent hw state log by default */
- if (!hubbub1_verify_allow_pstate_change_high(dc->res_pool->hubbub)) {
+ if (!hubbub->funcs->verify_allow_pstate_change_high)
+ return;
+
+ if (!hubbub->funcs->verify_allow_pstate_change_high(hubbub)) {
int i = 0;
if (should_log_hw_state)
TRACE_DC_PIPE_STATE(pipe_ctx, i, MAX_PIPES);
BREAK_TO_DEBUGGER();
if (dcn10_hw_wa_force_recovery(dc)) {
- /*check again*/
- if (!hubbub1_verify_allow_pstate_change_high(dc->res_pool->hubbub))
+ /*check again*/
+ if (!hubbub->funcs->verify_allow_pstate_change_high(hubbub))
BREAK_TO_DEBUGGER();
}
}
}
}
+static bool hubbub31_verify_allow_pstate_change_high(struct hubbub *hubbub)
+{
+ struct dcn20_hubbub *hubbub2 = TO_DCN20_HUBBUB(hubbub);
+
+ /*
+ * Pstate latency is ~20us so if we wait over 40us and pstate allow
+ * still not asserted, we are probably stuck and going to hang
+ */
+ const unsigned int pstate_wait_timeout_us = 100;
+ const unsigned int pstate_wait_expected_timeout_us = 40;
+
+ static unsigned int max_sampled_pstate_wait_us; /* data collection */
+ static bool forced_pstate_allow; /* help with revert wa */
+
+ unsigned int debug_data = 0;
+ unsigned int i;
+
+ if (forced_pstate_allow) {
+ /* we hacked to force pstate allow to prevent hang last time
+ * we verify_allow_pstate_change_high. so disable force
+ * here so we can check status
+ */
+ REG_UPDATE_2(DCHUBBUB_ARB_DRAM_STATE_CNTL,
+ DCHUBBUB_ARB_ALLOW_PSTATE_CHANGE_FORCE_VALUE, 0,
+ DCHUBBUB_ARB_ALLOW_PSTATE_CHANGE_FORCE_ENABLE, 0);
+ forced_pstate_allow = false;
+ }
+
+ REG_WRITE(DCHUBBUB_TEST_DEBUG_INDEX, hubbub2->debug_test_index_pstate);
+
+ for (i = 0; i < pstate_wait_timeout_us; i++) {
+ debug_data = REG_READ(DCHUBBUB_TEST_DEBUG_DATA);
+
+ /* Debug bit is specific to ASIC. */
+ if (debug_data & (1 << 26)) {
+ if (i > pstate_wait_expected_timeout_us)
+ DC_LOG_WARNING("pstate took longer than expected ~%dus\n", i);
+ return true;
+ }
+ if (max_sampled_pstate_wait_us < i)
+ max_sampled_pstate_wait_us = i;
+
+ udelay(1);
+ }
+
+ /* force pstate allow to prevent system hang
+ * and break to debugger to investigate
+ */
+ REG_UPDATE_2(DCHUBBUB_ARB_DRAM_STATE_CNTL,
+ DCHUBBUB_ARB_ALLOW_PSTATE_CHANGE_FORCE_VALUE, 1,
+ DCHUBBUB_ARB_ALLOW_PSTATE_CHANGE_FORCE_ENABLE, 1);
+ forced_pstate_allow = true;
+
+ DC_LOG_WARNING("pstate TEST_DEBUG_DATA: 0x%X\n",
+ debug_data);
+
+ return false;
+}
+
static const struct hubbub_funcs hubbub31_funcs = {
.update_dchub = hubbub2_update_dchub,
.init_dchub_sys_ctx = hubbub31_init_dchub_sys_ctx,
.program_watermarks = hubbub31_program_watermarks,
.allow_self_refresh_control = hubbub1_allow_self_refresh_control,
.is_allow_self_refresh_enabled = hubbub1_is_allow_self_refresh_enabled,
+ .verify_allow_pstate_change_high = hubbub31_verify_allow_pstate_change_high,
.program_det_size = dcn31_program_det_size,
.program_compbuf_size = dcn31_program_compbuf_size,
.init_crb = dcn31_init_crb,