[PATCH 17/18] drm/amd/display: Add pp_smu null pointer check

[Bhawanpreet Lakha]

From: Charlene Liu <charlene.liu at amd.com>

res_pool->pp_smu may be NULL. Check before use

Change-Id: Ib038334b2374b10012fc374a3aeb5c417655c7c9
Signed-off-by: Charlene Liu <charlene.liu at amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c     |  6 ++++--
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c | 11 ++++++-----
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
index 2a807b9f77f7..8ee182be394a 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
@@ -1391,12 +1391,14 @@ void dcn_bw_update_from_pplib(struct dc *dc)
 
 void dcn_bw_notify_pplib_of_wm_ranges(struct dc *dc)
 {
-	struct pp_smu_funcs_rv *pp = &dc->res_pool->pp_smu->rv_funcs;
+	struct pp_smu_funcs_rv *pp = NULL;
 	struct pp_smu_wm_range_sets ranges = {0};
 	int min_fclk_khz, min_dcfclk_khz, socclk_khz;
 	const int overdrive = 5000000; /* 5 GHz to cover Overdrive */
 
-	if (!pp->set_wm_ranges)
+	if (dc->res_pool->pp_smu)
+		pp = &dc->res_pool->pp_smu->rv_funcs;
+	if (!pp || !pp->set_wm_ranges)
 		return;
 
 	kernel_fpu_begin();
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c
index 3b91505063e9..2fb65d16205c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c
@@ -171,7 +171,7 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr,
 	struct pp_smu_display_requirement_rv *smu_req_cur =
 			&dc->res_pool->pp_smu_req;
 	struct pp_smu_display_requirement_rv smu_req = *smu_req_cur;
-	struct pp_smu_funcs_rv *pp_smu = &dc->res_pool->pp_smu->rv_funcs;
+	struct pp_smu_funcs_rv *pp_smu = NULL;
 	bool send_request_to_increase = false;
 	bool send_request_to_lower = false;
 	int display_count;
@@ -179,7 +179,8 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr,
 	bool enter_display_off = false;
 
 	display_count = get_active_display_cnt(dc, context);
-
+	if (dc->res_pool->pp_smu)
+		pp_smu = &dc->res_pool->pp_smu->rv_funcs;
 	if (display_count == 0)
 		enter_display_off = true;
 
@@ -189,7 +190,7 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr,
 		 * if function pointer not set up, this message is
 		 * sent as part of pplib_apply_display_requirements.
 		 */
-		if (pp_smu->set_display_count)
+		if (pp_smu && pp_smu->set_display_count)
 			pp_smu->set_display_count(&pp_smu->pp_smu, display_count);
 
 		smu_req.display_count = display_count;
@@ -239,7 +240,7 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr,
 	 */
 	if (send_request_to_increase) {
 		/*use dcfclk to request voltage*/
-		if (pp_smu->set_hard_min_fclk_by_freq &&
+		if (pp_smu && pp_smu->set_hard_min_fclk_by_freq &&
 				pp_smu->set_hard_min_dcfclk_by_freq &&
 				pp_smu->set_min_deep_sleep_dcfclk) {
 
@@ -261,7 +262,7 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr,
 
 	if (!send_request_to_increase && send_request_to_lower) {
 		/*use dcfclk to request voltage*/
-		if (pp_smu->set_hard_min_fclk_by_freq &&
+		if (pp_smu && pp_smu->set_hard_min_fclk_by_freq &&
 				pp_smu->set_hard_min_dcfclk_by_freq &&
 				pp_smu->set_min_deep_sleep_dcfclk) {
 
-- 
2.17.1