drm/amd/display: Fix uninitialized variables in DC

Alex Hung · alexdeucher · commit ba3193fa8fc8 · 2024-04-26T17:22:44.000-04:00
This fixes 49 UNINIT issues reported by Coverity.

Reviewed-by: Hersen Wu &lt;hersenxs.wu@amd.com&gt;
Acked-by: Wayne Lin &lt;wayne.lin@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1306,7 +1306,7 @@ static void disable_vbios_mode_if_required(
 
 		if (link != NULL && link->link_enc->funcs->is_dig_enabled(link->link_enc)) {
 			unsigned int enc_inst, tg_inst = 0;
-			unsigned int pix_clk_100hz;
+			unsigned int pix_clk_100hz = 0;
 
 			enc_inst = link->link_enc->funcs->get_dig_frontend(link->link_enc);
 			if (enc_inst != ENGINE_ID_UNKNOWN) {
@@ -1793,7 +1793,7 @@ bool dc_validate_boot_timing(const struct dc *dc,
 		return false;
 
 	if (dc_is_dp_signal(link->connector_signal)) {
-		unsigned int pix_clk_100hz;
+		unsigned int pix_clk_100hz = 0;
 		uint32_t numOdmPipes = 1;
 		uint32_t id_src[4] = {0};
 
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -3042,7 +3042,7 @@ bool resource_update_pipes_for_plane_with_slice_count(
 	int i;
 	int dpp_pipe_count;
 	int cur_slice_count;
-	struct pipe_ctx *dpp_pipes[MAX_PIPES];
+	struct pipe_ctx *dpp_pipes[MAX_PIPES] = {0};
 	bool result = true;
 
 	dpp_pipe_count = resource_get_dpp_pipes_for_plane(plane,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_mpc.c
@@ -1183,7 +1183,7 @@ void mpc3_get_gamut_remap(struct mpc *mpc,
 			  struct mpc_grph_gamut_adjustment *adjust)
 {
 	struct dcn30_mpc *mpc30 = TO_DCN30_MPC(mpc);
-	uint16_t arr_reg_val[12];
+	uint16_t arr_reg_val[12] = {0};
 	int select;
 
 	read_gamut_remap(mpc30, mpcc_id, arr_reg_val, &select);
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c b/drivers/gpu/drm/amd/display/dc/dml2/dml2_dc_resource_mgmt.c
@@ -864,7 +864,7 @@ static unsigned int get_source_mpc_factor(const struct dml2_context *ctx,
 		struct dc_state *state,
 		const struct dc_plane_state *plane)
 {
-	struct pipe_ctx *dpp_pipes[MAX_PIPES];
+	struct pipe_ctx *dpp_pipes[MAX_PIPES] = {0};
 	int dpp_pipe_count = ctx->config.callbacks.get_dpp_pipes_for_plane(plane,
 			&state->res_ctx, dpp_pipes);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_cm.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_cm.c
@@ -234,7 +234,7 @@ void dpp1_cm_get_gamut_remap(struct dpp *dpp_base,
 			     struct dpp_grph_csc_adjustment *adjust)
 {
 	struct dcn10_dpp *dpp = TO_DCN10_DPP(dpp_base);
-	uint16_t arr_reg_val[12];
+	uint16_t arr_reg_val[12] = {0};
 	enum gamut_remap_select select;
 
 	read_gamut_remap(dpp, arr_reg_val, &select);
diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn20/dcn20_dpp_cm.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn20/dcn20_dpp_cm.c
@@ -274,7 +274,7 @@ void dpp2_cm_get_gamut_remap(struct dpp *dpp_base,
 			     struct dpp_grph_csc_adjustment *adjust)
 {
 	struct dcn20_dpp *dpp = TO_DCN20_DPP(dpp_base);
-	uint16_t arr_reg_val[12];
+	uint16_t arr_reg_val[12] = {0};
 	enum dcn20_gamut_remap_select select;
 
 	read_gamut_remap(dpp, arr_reg_val, &select);
diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp_cm.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp_cm.c
@@ -445,7 +445,7 @@ void dpp3_cm_get_gamut_remap(struct dpp *dpp_base,
 			     struct dpp_grph_csc_adjustment *adjust)
 {
 	struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);
-	uint16_t arr_reg_val[12];
+	uint16_t arr_reg_val[12] = {0};
 	int select;
 
 	read_gamut_remap(dpp, arr_reg_val, &select);
diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
@@ -128,7 +128,7 @@ struct gpio *dal_gpio_service_create_irq(
 	uint32_t offset,
 	uint32_t mask)
 {
-	enum gpio_id id;
+	enum gpio_id id = 0;
 	uint32_t en;
 
 	if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
@@ -144,7 +144,7 @@ struct gpio *dal_gpio_service_create_generic_mux(
 	uint32_t offset,
 	uint32_t mask)
 {
-	enum gpio_id id;
+	enum gpio_id id = 0;
 	uint32_t en;
 	struct gpio *generic;
 
@@ -178,7 +178,7 @@ struct gpio_pin_info dal_gpio_get_generic_pin_info(
 	enum gpio_id id,
 	uint32_t en)
 {
-	struct gpio_pin_info pin;
+	struct gpio_pin_info pin = {0};
 
 	if (service->translate.funcs->id_to_offset) {
 		service->translate.funcs->id_to_offset(id, en, &pin);
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1537,7 +1537,7 @@ enum dc_status dce110_apply_single_controller_ctx_to_hw(
 	}
 
 	if (pipe_ctx->stream_res.audio != NULL) {
-		struct audio_output audio_output;
+		struct audio_output audio_output = {0};
 
 		build_audio_output(context, pipe_ctx, &audio_output);
 
@@ -2260,7 +2260,7 @@ static void dce110_setup_audio_dto(
 				continue;
 
 			if (pipe_ctx->stream_res.audio != NULL) {
-				struct audio_output audio_output;
+				struct audio_output audio_output = {0};
 
 				build_audio_output(context, pipe_ctx, &audio_output);
 
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c
@@ -2185,7 +2185,7 @@ static int dcn10_align_pixel_clocks(struct dc *dc, int group_size,
 	struct dc_crtc_timing *hw_crtc_timing;
 	uint64_t phase[MAX_PIPES];
 	uint64_t modulo[MAX_PIPES];
-	unsigned int pclk;
+	unsigned int pclk = 0;
 
 	uint32_t embedded_pix_clk_100hz;
 	uint16_t embedded_h_total;
@@ -2276,7 +2276,7 @@ void dcn10_enable_vblanks_synchronization(
 	struct dc_context *dc_ctx = dc->ctx;
 	struct output_pixel_processor *opp;
 	struct timing_generator *tg;
-	int i, width, height, master;
+	int i, width = 0, height = 0, master;
 
 	DC_LOGGER_INIT(dc_ctx->logger);
 
@@ -2342,7 +2342,7 @@ void dcn10_enable_timing_synchronization(
 	struct dc_context *dc_ctx = dc->ctx;
 	struct output_pixel_processor *opp;
 	struct timing_generator *tg;
-	int i, width, height;
+	int i, width = 0, height = 0;
 
 	DC_LOGGER_INIT(dc_ctx->logger);
 
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn201/dcn201_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn201/dcn201_hwseq.c
@@ -167,7 +167,7 @@ void dcn201_init_blank(
 	struct tg_color black_color = {0};
 	struct output_pixel_processor *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;
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn21/dcn21_hwseq.c
@@ -66,7 +66,7 @@ static void mmhub_update_page_table_config(struct dcn_hubbub_phys_addr_config *c
 
 int dcn21_init_sys_ctx(struct dce_hwseq *hws, struct dc *dc, struct dc_phy_addr_space_config *pa_config)
 {
-	struct dcn_hubbub_phys_addr_config config;
+	struct dcn_hubbub_phys_addr_config config = {0};
 
 	config.system_aperture.fb_top = pa_config->system_aperture.fb_top;
 	config.system_aperture.fb_offset = pa_config->system_aperture.fb_offset;
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c
@@ -479,7 +479,7 @@ void dcn31_hubp_pg_control(struct dce_hwseq *hws, unsigned int hubp_inst, bool p
 
 int dcn31_init_sys_ctx(struct dce_hwseq *hws, struct dc *dc, struct dc_phy_addr_space_config *pa_config)
 {
-	struct dcn_hubbub_phys_addr_config config;
+	struct dcn_hubbub_phys_addr_config config = {0};
 
 	config.system_aperture.fb_top = pa_config->system_aperture.fb_top;
 	config.system_aperture.fb_offset = pa_config->system_aperture.fb_offset;
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -726,7 +726,7 @@ static void set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
 
 static void enable_mst_on_sink(struct dc_link *link, bool enable)
 {
-	unsigned char mstmCntl;
+	unsigned char mstmCntl = 0;
 
 	core_link_read_dpcd(link, DP_MSTM_CTRL, &mstmCntl, 1);
 	if (enable)
@@ -804,7 +804,7 @@ void link_set_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 */
@@ -1576,7 +1576,7 @@ static bool write_128b_132b_sst_payload_allocation_table(
 				break;
 			}
 		} else {
-			union dpcd_rev dpcdRev;
+			union dpcd_rev dpcdRev = {0};
 
 			if (core_link_read_dpcd(
 					link,
@@ -2120,7 +2120,7 @@ static enum dc_status enable_link_dp_mst(
 		struct pipe_ctx *pipe_ctx)
 {
 	struct dc_link *link = pipe_ctx->stream->link;
-	unsigned char mstm_cntl;
+	unsigned char mstm_cntl = 0;
 
 	/* sink signal type after MST branch is MST. Multiple MST sinks
 	 * share one link. Link DP PHY is enable or training only once.
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -992,7 +992,7 @@ enum dp_link_encoding mst_decide_link_encoding_format(const struct dc_link *link
 
 static void read_dp_device_vendor_id(struct dc_link *link)
 {
-	struct dp_device_vendor_id dp_id;
+	struct dp_device_vendor_id dp_id = {0};
 
 	/* read IEEE branch device id */
 	core_link_read_dpcd(
@@ -1087,7 +1087,7 @@ static void get_active_converter_info(
 	}
 
 	if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_11) {
-		uint8_t det_caps[16]; /* CTS 4.2.2.7 expects source to read Detailed Capabilities Info : 00080h-0008F.*/
+		uint8_t det_caps[16] = {0}; /* CTS 4.2.2.7 expects source to read Detailed Capabilities Info : 00080h-0008F.*/
 		union dwnstream_port_caps_byte0 *port_caps =
 			(union dwnstream_port_caps_byte0 *)det_caps;
 		if (core_link_read_dpcd(link, DP_DOWNSTREAM_PORT_0,
@@ -1172,7 +1172,7 @@ static void get_active_converter_info(
 	set_dongle_type(link->ddc, link->dpcd_caps.dongle_type);
 
 	{
-		struct dp_sink_hw_fw_revision dp_hw_fw_revision;
+		struct dp_sink_hw_fw_revision dp_hw_fw_revision = {0};
 
 		core_link_read_dpcd(
 			link,
@@ -1242,7 +1242,7 @@ static void apply_usbc_combo_phy_reset_wa(struct dc_link *link,
 
 bool dp_overwrite_extended_receiver_cap(struct dc_link *link)
 {
-	uint8_t dpcd_data[16];
+	uint8_t dpcd_data[16] = {0};
 	uint32_t read_dpcd_retry_cnt = 3;
 	enum dc_status status = DC_ERROR_UNEXPECTED;
 	union dp_downstream_port_present ds_port = { 0 };
@@ -1408,7 +1408,7 @@ static bool get_usbc_cable_id(struct dc_link *link, union dp_cable_id *cable_id)
 
 static void retrieve_cable_id(struct dc_link *link)
 {
-	union dp_cable_id usbc_cable_id;
+	union dp_cable_id usbc_cable_id = {0};
 
 	link->dpcd_caps.cable_id.raw = 0;
 	core_link_read_dpcd(link, DP_CABLE_ATTRIBUTES_UPDATED_BY_DPRX,
@@ -1475,7 +1475,7 @@ static bool dpcd_read_sink_ext_caps(struct dc_link *link)
 
 enum dc_status dp_retrieve_lttpr_cap(struct dc_link *link)
 {
-	uint8_t lttpr_dpcd_data[8];
+	uint8_t lttpr_dpcd_data[8] = {0};
 	enum dc_status status;
 	bool is_lttpr_present;
 
@@ -1931,8 +1931,8 @@ void detect_edp_sink_caps(struct dc_link *link)
 	uint32_t entry;
 	uint32_t link_rate_in_khz;
 	enum dc_link_rate link_rate = LINK_RATE_UNKNOWN;
-	uint8_t backlight_adj_cap;
-	uint8_t general_edp_cap;
+	uint8_t backlight_adj_cap = 0;
+	uint8_t general_edp_cap = 0;
 
 	retrieve_link_cap(link);
 	link->dpcd_caps.edp_supported_link_rates_count = 0;
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_irq_handler.c
@@ -120,7 +120,7 @@ bool dp_parse_link_loss_status(
 
 static bool handle_hpd_irq_psr_sink(struct dc_link *link)
 {
-	union dpcd_psr_configuration psr_configuration;
+	union dpcd_psr_configuration psr_configuration = {0};
 
 	if (!link->psr_settings.psr_feature_enabled)
 		return false;
@@ -186,9 +186,9 @@ static bool handle_hpd_irq_psr_sink(struct dc_link *link)
 
 static void handle_hpd_irq_replay_sink(struct dc_link *link)
 {
-	union dpcd_replay_configuration replay_configuration;
+	union dpcd_replay_configuration replay_configuration = {0};
 	/*AMD Replay version reuse DP_PSR_ERROR_STATUS for REPLAY_ERROR status.*/
-	union psr_error_status replay_error_status;
+	union psr_error_status replay_error_status = {0};
 
 	if (!link->replay_settings.replay_feature_enabled)
 		return;
@@ -280,7 +280,7 @@ void dp_handle_link_loss(struct dc_link *link)
 static void read_dpcd204h_on_irq_hpd(struct dc_link *link, union hpd_irq_data *irq_data)
 {
 	enum dc_status retval;
-	union lane_align_status_updated dpcd_lane_status_updated;
+	union lane_align_status_updated dpcd_lane_status_updated = {0};
 
 	retval = core_link_read_dpcd(
 			link,
@@ -320,7 +320,7 @@ enum dc_status dp_read_hpd_rx_irq_data(
 		/* Read 14 bytes in a single read and then copy only the required fields.
 		 * This is more efficient than doing it in two separate AUX reads. */
 
-		uint8_t tmp[DP_SINK_STATUS_ESI - DP_SINK_COUNT_ESI + 1];
+		uint8_t tmp[DP_SINK_STATUS_ESI - DP_SINK_COUNT_ESI + 1] = {0};
 
 		retval = core_link_read_dpcd(
 			link,
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
@@ -321,8 +321,8 @@ bool edp_is_ilr_optimization_required(struct dc_link *link,
 		struct dc_crtc_timing *crtc_timing)
 {
 	struct dc_link_settings link_setting;
-	uint8_t link_bw_set;
-	uint8_t link_rate_set;
+	uint8_t link_bw_set = 0;
+	uint8_t link_rate_set = 0;
 	uint32_t req_bw;
 	union lane_count_set lane_count_set = {0};
 
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c
@@ -35,7 +35,7 @@
 
 bool link_get_hpd_state(struct dc_link *link)
 {
-	uint32_t state;
+	uint32_t state = 0;
 
 	dal_gpio_lock_pin(link->hpd_gpio);
 	dal_gpio_get_value(link->hpd_gpio, &state);

Original file line number	Diff line number	Diff line change
`@@ -1183,7 +1183,7 @@ void mpc3_get_gamut_remap(struct mpc *mpc,`
`1183`	`1183`	`struct mpc_grph_gamut_adjustment *adjust)`
`1184`	`1184`	`{`
`1185`	`1185`	`struct dcn30_mpc *mpc30 = TO_DCN30_MPC(mpc);`
`1186`		`- uint16_t arr_reg_val[12];`
	`1186`	`+ uint16_t arr_reg_val[12] = {0};`
`1187`	`1187`	`int select;`
`1188`	`1188`
`1189`	`1189`	`read_gamut_remap(mpc30, mpcc_id, arr_reg_val, &select);`
Original file line number	Diff line number	Diff line change
`@@ -864,7 +864,7 @@ static unsigned int get_source_mpc_factor(const struct dml2_context *ctx,`
`864`	`864`	`struct dc_state *state,`
`865`	`865`	`const struct dc_plane_state *plane)`
`866`	`866`	`{`
`867`		`- struct pipe_ctx *dpp_pipes[MAX_PIPES];`
	`867`	`+ struct pipe_ctx *dpp_pipes[MAX_PIPES] = {0};`
`868`	`868`	`int dpp_pipe_count = ctx->config.callbacks.get_dpp_pipes_for_plane(plane,`
`869`	`869`	`&state->res_ctx, dpp_pipes);`
`870`	`870`
Original file line number	Diff line number	Diff line change
`@@ -234,7 +234,7 @@ void dpp1_cm_get_gamut_remap(struct dpp *dpp_base,`
`234`	`234`	`struct dpp_grph_csc_adjustment *adjust)`
`235`	`235`	`{`
`236`	`236`	`struct dcn10_dpp *dpp = TO_DCN10_DPP(dpp_base);`
`237`		`- uint16_t arr_reg_val[12];`
	`237`	`+ uint16_t arr_reg_val[12] = {0};`
`238`	`238`	`enum gamut_remap_select select;`
`239`	`239`
`240`	`240`	`read_gamut_remap(dpp, arr_reg_val, &select);`
Original file line number	Diff line number	Diff line change
`@@ -274,7 +274,7 @@ void dpp2_cm_get_gamut_remap(struct dpp *dpp_base,`
`274`	`274`	`struct dpp_grph_csc_adjustment *adjust)`
`275`	`275`	`{`
`276`	`276`	`struct dcn20_dpp *dpp = TO_DCN20_DPP(dpp_base);`
`277`		`- uint16_t arr_reg_val[12];`
	`277`	`+ uint16_t arr_reg_val[12] = {0};`
`278`	`278`	`enum dcn20_gamut_remap_select select;`
`279`	`279`
`280`	`280`	`read_gamut_remap(dpp, arr_reg_val, &select);`
Original file line number	Diff line number	Diff line change
`@@ -445,7 +445,7 @@ void dpp3_cm_get_gamut_remap(struct dpp *dpp_base,`
`445`	`445`	`struct dpp_grph_csc_adjustment *adjust)`
`446`	`446`	`{`
`447`	`447`	`struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);`
`448`		`- uint16_t arr_reg_val[12];`
	`448`	`+ uint16_t arr_reg_val[12] = {0};`
`449`	`449`	`int select;`
`450`	`450`
`451`	`451`	`read_gamut_remap(dpp, arr_reg_val, &select);`