drm/amd/display: Remove redundant null checks

The null checks are redundant as they were already dereferenced
previously, as reported by Coverity; therefore the null checks
are removed.

This fixes 7 REVERSE_INULL issues reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c

@@ -553,7 +553,7 @@ static void dcn32_auto_dpm_test_log(
 	//
 	//				AutoDPMTest: clk1:%d - clk2:%d - clk3:%d - clk4:%d\n"
 	////////////////////////////////////////////////////////////////////////////
-	if (new_clocks && active_pipe_count > 0 &&
+	if (active_pipe_count > 0 &&
 		new_clocks->dramclk_khz > 0 &&
 		new_clocks->fclk_khz > 0 &&
 		new_clocks->dcfclk_khz > 0 &&

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -2640,7 +2640,7 @@ static enum surface_update_type det_surface_update(const struct dc *dc,
 
 		if (u->plane_info)
 			format = u->plane_info->format;
-		else if (u->surface)
+		else
 			format = u->surface->format;
 
 		if (dce_use_lut(format))
@@ -2741,7 +2741,7 @@ static enum surface_update_type check_update_surfaces_for_stream(
 		if (stream_update->mst_bw_update)
 			su_flags->bits.mst_bw = 1;
 
-		if (stream_update->stream && stream_update->stream->freesync_on_desktop &&
+		if (stream_update->stream->freesync_on_desktop &&
 			(stream_update->vrr_infopacket || stream_update->allow_freesync ||
 				stream_update->vrr_active_variable || stream_update->vrr_active_fixed))
 			su_flags->bits.fams_changed = 1;

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

@@ -2099,7 +2099,7 @@ int resource_get_odm_slice_dst_width(struct pipe_ctx *otg_master,
 			timing->h_border_right;
 	width = h_active / count;
 
-	if (otg_master->stream_res.tg && otg_master->stream)
+	if (otg_master->stream_res.tg)
 		two_pixel_alignment_required =
 				otg_master->stream_res.tg->funcs->is_two_pixels_per_container(timing) ||
 				/*

drivers/gpu/drm/amd/display/dc/dml2/dml21/dml21_translation_helper.c

@@ -102,9 +102,7 @@ void dml21_apply_soc_bb_overrides(struct dml2_initialize_instance_in_out *dml_in
 	struct dml2_soc_state_table *dml_clk_table = &dml_soc_bb->clk_table;
 
 	/* override clocks if smu is present */
-	if (in_dc->clk_mgr &&
-			in_dc->clk_mgr->funcs->is_smu_present &&
-			in_dc->clk_mgr->funcs->is_smu_present(in_dc->clk_mgr)) {
+	if (in_dc->clk_mgr->funcs->is_smu_present && in_dc->clk_mgr->funcs->is_smu_present(in_dc->clk_mgr)) {
 		/* dcfclk */
 		if (dc_clk_table->num_entries_per_clk.num_dcfclk_levels) {
 			dml_clk_table->dcfclk.num_clk_values = dc_clk_table->num_entries_per_clk.num_dcfclk_levels;

drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c

@@ -742,13 +742,11 @@ void dce110_edp_wait_for_hpd_ready(
 		return;
 	}
 
-	if (link != NULL) {
 	if (link->panel_config.pps.extra_t3_ms > 0) {
 		int extra_t3_in_ms = link->panel_config.pps.extra_t3_ms;
 
 		msleep(extra_t3_in_ms);
 	}
-	}
 
 	dal_gpio_open(hpd, GPIO_MODE_INTERRUPT);
 

drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c

@@ -271,8 +271,6 @@ bool dcn32_apply_idle_power_optimizations(struct dc *dc, bool enable)
 	}
 
 	if (enable) {
-		if (dc->current_state) {
-
 		/* 1. Check no memory request case for CAB.
 		 * If no memory request case, send CAB_ACTION NO_DF_REQ DMUB message
 		 */
@@ -322,7 +320,6 @@ bool dcn32_apply_idle_power_optimizations(struct dc *dc, bool enable)
 			return true;
 		}
 
-		}
 		return false;
 	}