[PATCH v4 2/3] drm/amd/display: Split out checks for applying HPD WA into a separate function

[Mario Limonciello <mario.limonciello@xxxxxxx>]

This will make it cleaner to read through the logic for an upcoming change.

Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
Changes from v3->v4:
 * New patch
 .../amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 30 +++++++++++--------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index fbda42313bfe..20974829f304 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -120,6 +120,23 @@ static void rn_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr,
 	}
 }
 
+static bool check_really_safe_to_lower(struct dc *dc, struct dc_state *context)
+{
+	int display_count = rn_get_active_display_cnt_wa(dc, context);
+	uint32_t hpd_state;
+	int irq_src;
+
+	if (display_count > 0)
+		return false;
+
+	for (irq_src = DC_IRQ_SOURCE_HPD1; irq_src <= DC_IRQ_SOURCE_HPD5; irq_src++) {
+		hpd_state = dc_get_hpd_state_dcn21(dc->res_pool->irqs, irq_src);
+		if (hpd_state)
+			break;
+	}
+
+	return !hpd_state;
+}
 
 static void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 			struct dc_state *context,
@@ -128,12 +145,9 @@ static void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
 	struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
 	struct dc *dc = clk_mgr_base->ctx->dc;
-	int display_count;
-	int irq_src;
 	bool update_dppclk = false;
 	bool update_dispclk = false;
 	bool dpp_clock_lowered = false;
-	uint32_t hpd_state;
 
 	struct dmcu *dmcu = clk_mgr_base->ctx->dc->res_pool->dmcu;
 
@@ -148,16 +162,8 @@ static void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 		/* check that we're not already in lower */
 		if (clk_mgr_base->clks.pwr_state != DCN_PWR_STATE_LOW_POWER) {
 
-			display_count = rn_get_active_display_cnt_wa(dc, context);
-
-			for (irq_src = DC_IRQ_SOURCE_HPD1; irq_src <= DC_IRQ_SOURCE_HPD5; irq_src++) {
-				hpd_state = dc_get_hpd_state_dcn21(dc->res_pool->irqs, irq_src);
-				if (hpd_state)
-					break;
-			}
-
 			/* if we can go lower, go lower */
-			if (display_count == 0 && !hpd_state) {
+			if (check_really_safe_to_lower(dc, context)) {
 				rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER);
 				/* update power state */
 				clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER;
-- 
2.25.1