drm/amd/display: Fix uninitialized variables in DC

This fixes 29 UNINIT issues reported by Coverity.
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Wayne Lin <wayne.lin@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/bios/command_table.c

@@ -399,7 +399,7 @@ static enum bp_result transmitter_control_v1_6(
 static void init_transmitter_control(struct bios_parser *bp)
 {
 	uint8_t frev;
-	uint8_t crev;
+	uint8_t crev = 0;
 
 	if (BIOS_CMD_TABLE_REVISION(UNIPHYTransmitterControl,
 			frev, crev) == false)

drivers/gpu/drm/amd/display/dc/bios/command_table2.c

@@ -225,7 +225,7 @@ static enum bp_result transmitter_control_fallback(
 static void init_transmitter_control(struct bios_parser *bp)
 {
 	uint8_t frev;
-	uint8_t crev;
+	uint8_t crev = 0;
 
 	BIOS_CMD_TABLE_REVISION(dig1transmittercontrol, frev, crev);
 

drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c

@@ -2372,7 +2372,7 @@ bool dcn21_validate_bandwidth_fp(struct dc *dc, struct dc_state *context,
 
 static struct _vcs_dpi_voltage_scaling_st construct_low_pstate_lvl(struct clk_limit_table *clk_table, unsigned int high_voltage_lvl)
 {
-	struct _vcs_dpi_voltage_scaling_st low_pstate_lvl;
+	struct _vcs_dpi_voltage_scaling_st low_pstate_lvl = {0};
 	int i;
 
 	low_pstate_lvl.state = 1;
@@ -2477,7 +2477,7 @@ void dcn201_populate_dml_writeback_from_context_fpu(struct dc *dc,
 	int pipe_cnt, i, j;
 	double max_calc_writeback_dispclk;
 	double writeback_dispclk;
-	struct writeback_st dout_wb;
+	struct writeback_st dout_wb = {0};
 
 	dc_assert_fp_enabled();
 

drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c

@@ -260,7 +260,7 @@ void dcn30_fpu_populate_dml_writeback_from_context(
 	int pipe_cnt, i, j;
 	double max_calc_writeback_dispclk;
 	double writeback_dispclk;
-	struct writeback_st dout_wb;
+	struct writeback_st dout_wb = {0};
 
 	dc_assert_fp_enabled();
 

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

@@ -723,7 +723,7 @@ static bool dcn32_enough_pipes_for_subvp(struct dc *dc, struct dc_state *context
  */
 static bool subvp_subvp_schedulable(struct dc *dc, struct dc_state *context)
 {
-	struct pipe_ctx *subvp_pipes[2];
+	struct pipe_ctx *subvp_pipes[2] = {0};
 	struct dc_stream_state *phantom = NULL;
 	uint32_t microschedule_lines = 0;
 	uint32_t index = 0;

drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_util_32.c

@@ -1973,8 +1973,8 @@ void dml32_CalculateVMRowAndSwath(
 	unsigned int PTEBufferSizeInRequestsForChroma[DC__NUM_DPP__MAX];
 	unsigned int PDEAndMetaPTEBytesFrameY;
 	unsigned int PDEAndMetaPTEBytesFrameC;
-	unsigned int MetaRowByteY[DC__NUM_DPP__MAX];
-	unsigned int MetaRowByteC[DC__NUM_DPP__MAX];
+	unsigned int MetaRowByteY[DC__NUM_DPP__MAX] = {0};
+	unsigned int MetaRowByteC[DC__NUM_DPP__MAX] = {0};
 	unsigned int PixelPTEBytesPerRowY[DC__NUM_DPP__MAX];
 	unsigned int PixelPTEBytesPerRowC[DC__NUM_DPP__MAX];
 	unsigned int PixelPTEBytesPerRowY_one_row_per_frame[DC__NUM_DPP__MAX];

drivers/gpu/drm/amd/display/dc/dml2/dml2_translation_helper.c

@@ -250,8 +250,8 @@ void dml2_init_soc_states(struct dml2_context *dml2, const struct dc *in_dc,
 {
 	struct dml2_policy_build_synthetic_soc_states_scratch *s = &dml2->v20.scratch.create_scratch.build_synthetic_socbb_scratch;
 	struct dml2_policy_build_synthetic_soc_states_params *p = &dml2->v20.scratch.build_synthetic_socbb_params;
-	unsigned int dcfclk_stas_mhz[NUM_DCFCLK_STAS];
-	unsigned int dcfclk_stas_mhz_new[NUM_DCFCLK_STAS_NEW];
+	unsigned int dcfclk_stas_mhz[NUM_DCFCLK_STAS] = {0};
+	unsigned int dcfclk_stas_mhz_new[NUM_DCFCLK_STAS_NEW] = {0};
 	unsigned int dml_project = dml2->v20.dml_core_ctx.project;
 
 	unsigned int i = 0;

drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c

@@ -403,7 +403,7 @@ void dcn20_init_blank(
 	struct output_pixel_processor *opp = NULL;
 	struct output_pixel_processor *bottom_opp = NULL;
 	uint32_t num_opps, opp_id_src0, opp_id_src1;
-	uint32_t otg_active_width, otg_active_height;
+	uint32_t otg_active_width = 0, otg_active_height = 0;
 
 	/* program opp dpg blank color */
 	color_space = COLOR_SPACE_SRGB;

drivers/gpu/drm/amd/display/dc/hwss/dcn314/dcn314_hwseq.c

@@ -82,7 +82,7 @@ static void update_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable)
 
 	if (enable) {
 		struct dsc_config dsc_cfg;
-		struct dsc_optc_config dsc_optc_cfg;
+		struct dsc_optc_config dsc_optc_cfg = {0};
 		enum optc_dsc_mode optc_dsc_mode;
 
 		/* Enable DSC hw block */

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

@@ -989,7 +989,7 @@ static void update_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable)
 
 	if (enable) {
 		struct dsc_config dsc_cfg;
-		struct dsc_optc_config dsc_optc_cfg;
+		struct dsc_optc_config dsc_optc_cfg = {0};
 		enum optc_dsc_mode optc_dsc_mode;
 
 		/* Enable DSC hw block */
@@ -1542,7 +1542,7 @@ void dcn32_init_blank(
 	struct output_pixel_processor *opp = NULL;
 	struct output_pixel_processor *bottom_opp = NULL;
 	uint32_t num_opps, opp_id_src0, opp_id_src1;
-	uint32_t otg_active_width, otg_active_height;
+	uint32_t otg_active_width = 0, otg_active_height = 0;
 	uint32_t i;
 
 	/* program opp dpg blank color */

drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c

@@ -373,7 +373,7 @@ static void update_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable)
 
 	if (enable) {
 		struct dsc_config dsc_cfg;
-		struct dsc_optc_config dsc_optc_cfg;
+		struct dsc_optc_config dsc_optc_cfg = {0};
 		enum optc_dsc_mode optc_dsc_mode;
 
 		/* Enable DSC hw block */

drivers/gpu/drm/amd/display/dc/link/link_detection.c

@@ -516,8 +516,8 @@ static void query_hdcp_capability(enum signal_type signal, struct dc_link *link)
 static void read_current_link_settings_on_detect(struct dc_link *link)
 {
 	union lane_count_set lane_count_set = {0};
-	uint8_t link_bw_set;
-	uint8_t link_rate_set;
+	uint8_t link_bw_set = 0;
+	uint8_t link_rate_set = 0;
 	uint32_t read_dpcd_retry_cnt = 10;
 	enum dc_status status = DC_ERROR_UNEXPECTED;
 	int i;

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_training.c

@@ -1071,7 +1071,7 @@ enum dc_status dpcd_set_link_settings(
 		 * MUX chip gets link rate set back before link training.
 		 */
 		if (link->connector_signal == SIGNAL_TYPE_EDP) {
-			uint8_t supported_link_rates[16];
+			uint8_t supported_link_rates[16] = {0};
 
 			core_link_read_dpcd(link, DP_SUPPORTED_LINK_RATES,
 					supported_link_rates, sizeof(supported_link_rates));

drivers/gpu/drm/amd/display/dc/resource/dcn303/dcn303_resource.c

@@ -1143,7 +1143,7 @@ static bool dcn303_resource_construct(
 	int i;
 	struct dc_context *ctx = dc->ctx;
 	struct irq_service_init_data init_data;
-	struct ddc_service_init_data ddc_init_data;
+	struct ddc_service_init_data ddc_init_data = {0};
 
 	ctx->dc_bios->regs = &bios_regs;