[PATCH 16/18] drm/amd/display: Fix null pointer issues found in emulation

[Alex Hung]

From: Charlene Liu <charlene....@amd.com>

[why]
fix null point issues found in emulation

Reviewed-by: Chris Park <chris.p...@amd.com>
Acked-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Charlene Liu <charlene....@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
index bdf101547484..165c920ca776 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
@@ -89,7 +89,8 @@ static void enable_memory_low_power(struct dc *dc)
                REG_UPDATE(MMHUBBUB_MEM_PWR_CNTL, VGA_MEM_PWR_FORCE, 1);
        }
 
-       if (dc->debug.enable_mem_low_power.bits.mpc)
+       if (dc->debug.enable_mem_low_power.bits.mpc &&
+               dc->res_pool->mpc->funcs->set_mpc_mem_lp_mode)
                
dc->res_pool->mpc->funcs->set_mpc_mem_lp_mode(dc->res_pool->mpc);
 
 
@@ -141,7 +142,8 @@ void dcn31_init_hw(struct dc *dc)
 
        if (!dcb->funcs->is_accelerated_mode(dcb)) {
                hws->funcs.bios_golden_init(dc);
-               hws->funcs.disable_vga(dc->hwseq);
+               if (hws->funcs.disable_vga)
+                       hws->funcs.disable_vga(dc->hwseq);
        }
        // Initialize the dccg
        if (res_pool->dccg->funcs->dccg_init)
-- 
2.38.1