[PATCH 20/21] drm/amd/display: Disable MALL when SMU not present

[Anson Jacob]

From: Chris Park <Chris.Park at amd.com>

[Why]
Bring-up purpose code to disable DMUB calling into
SMU and timeout for MALL when SMU is not present.

[How]
Disable MALL when SMU is not present.

Signed-off-by: Chris Park <Chris.Park at amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas at amd.com>
Acked-by: Anson Jacob <Anson.Jacob at amd.com>
---
 .../gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c   | 7 +++++++
 drivers/gpu/drm/amd/display/dc/core/dc.c                   | 4 ++++
 drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h            | 3 +++
 3 files changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
index 81ea5d3a1947..577e7f97045e 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn30/dcn30_clk_mgr.c
@@ -432,6 +432,12 @@ static void dcn3_get_memclk_states_from_smu(struct clk_mgr *clk_mgr_base)
 			clk_mgr->base.ctx->dc, clk_mgr_base->bw_params);
 }
 
+static bool dcn3_is_smu_prsent(struct clk_mgr *clk_mgr_base)
+{
+	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+	return clk_mgr->smu_present;
+}
+
 static bool dcn3_are_clock_states_equal(struct dc_clocks *a,
 					struct dc_clocks *b)
 {
@@ -494,6 +500,7 @@ static struct clk_mgr_funcs dcn3_funcs = {
 		.are_clock_states_equal = dcn3_are_clock_states_equal,
 		.enable_pme_wa = dcn3_enable_pme_wa,
 		.notify_link_rate_change = dcn30_notify_link_rate_change,
+		.is_smu_present = dcn3_is_smu_prsent
 };
 
 static void dcn3_init_clocks_fpga(struct clk_mgr *clk_mgr)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index a241b42a2fbb..d9ab134a178f 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3256,6 +3256,10 @@ void dc_allow_idle_optimizations(struct dc *dc, bool allow)
 	if (dc->debug.disable_idle_power_optimizations)
 		return;
 
+	if (dc->clk_mgr->funcs->is_smu_present)
+		if (!dc->clk_mgr->funcs->is_smu_present(dc->clk_mgr))
+			return;
+
 	if (allow == dc->idle_optimizations_allowed)
 		return;
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
index 4e94f2dec572..5dc8d02b40c3 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
@@ -262,6 +262,9 @@ struct clk_mgr_funcs {
 
 	/* Get current memclk states from PMFW, update relevant structures */
 	void (*get_memclk_states_from_smu)(struct clk_mgr *clk_mgr);
+
+	/* Get SMU present */
+	bool (*is_smu_present)(struct clk_mgr *clk_mgr);
 };
 
 struct clk_mgr {
-- 
2.25.1