drm/amd/display: Initialize dmub_rb_cmd unions to 0

[Why]
Since dmub_rb_cmds are not initialized to 0,
the header is filled with invalid data.
This is causing issues on the fw side.

[How]
Initialize dmub_rb_cmd unions to 0.
Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Josip Pavic <Josip.Pavic@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c

@@ -57,6 +57,7 @@ static void dmub_abm_enable_fractional_pwm(struct dc_context *dc)
 	union dmub_rb_cmd cmd;
 	uint32_t fractional_pwm = (dc->dc->config.disable_fractional_pwm == false) ? 1 : 0;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.abm_set_pwm_frac.header.type = DMUB_CMD__ABM;
 	cmd.abm_set_pwm_frac.header.sub_type = DMUB_CMD__ABM_SET_PWM_FRAC;
 	cmd.abm_set_pwm_frac.abm_set_pwm_frac_data.fractional_pwm = fractional_pwm;
@@ -135,6 +136,7 @@ static bool dmub_abm_set_level(struct abm *abm, uint32_t level)
 	union dmub_rb_cmd cmd;
 	struct dc_context *dc = abm->ctx;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.abm_set_level.header.type = DMUB_CMD__ABM;
 	cmd.abm_set_level.header.sub_type = DMUB_CMD__ABM_SET_LEVEL;
 	cmd.abm_set_level.abm_set_level_data.level = level;
@@ -160,6 +162,7 @@ static bool dmub_abm_init_config(struct abm *abm,
 	// Copy iramtable into cw7
 	memcpy(dc->dmub_srv->dmub->scratch_mem_fb.cpu_addr, (void *)src, bytes);
 
+	memset(&cmd, 0, sizeof(cmd));
 	// Fw will copy from cw7 to fw_state
 	cmd.abm_init_config.header.type = DMUB_CMD__ABM;
 	cmd.abm_init_config.header.sub_type = DMUB_CMD__ABM_INIT_CONFIG;

drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c

@@ -33,8 +33,9 @@ void dmub_hw_lock_mgr_cmd(struct dc_dmub_srv *dmub_srv,
 				union dmub_hw_lock_flags *hw_locks,
 				struct dmub_hw_lock_inst_flags *inst_flags)
 {
-	union dmub_rb_cmd cmd = { 0 };
+	union dmub_rb_cmd cmd;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.lock_hw.header.type = DMUB_CMD__HW_LOCK;
 	cmd.lock_hw.header.sub_type = 0;
 	cmd.lock_hw.header.payload_bytes = sizeof(struct dmub_cmd_lock_hw_data);

drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c

@@ -101,6 +101,7 @@ static bool dmub_psr_set_version(struct dmub_psr *dmub, struct dc_stream_state *
 	if (stream->link->psr_settings.psr_version == DC_PSR_VERSION_UNSUPPORTED)
 		return false;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.psr_set_version.header.type = DMUB_CMD__PSR;
 	cmd.psr_set_version.header.sub_type = DMUB_CMD__PSR_SET_VERSION;
 	switch (stream->link->psr_settings.psr_version) {
@@ -131,7 +132,7 @@ static void dmub_psr_enable(struct dmub_psr *dmub, bool enable, bool wait)
 	uint32_t retry_count;
 	enum dc_psr_state state = PSR_STATE0;
 
-
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.psr_enable.header.type = DMUB_CMD__PSR;
 
 	if (enable)
@@ -184,6 +185,7 @@ static void dmub_psr_set_level(struct dmub_psr *dmub, uint16_t psr_level)
 	if (state == PSR_STATE0)
 		return;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.psr_set_level.header.type = DMUB_CMD__PSR;
 	cmd.psr_set_level.header.sub_type = DMUB_CMD__PSR_SET_LEVEL;
 	cmd.psr_set_level.header.payload_bytes = sizeof(struct dmub_cmd_psr_set_level_data);
@@ -233,6 +235,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 	link->link_enc->funcs->psr_program_secondary_packet(link->link_enc,
 			psr_context->sdpTransmitLineNumDeadline);
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.psr_copy_settings.header.type = DMUB_CMD__PSR;
 	cmd.psr_copy_settings.header.sub_type = DMUB_CMD__PSR_COPY_SETTINGS;
 	cmd.psr_copy_settings.header.payload_bytes = sizeof(struct dmub_cmd_psr_copy_settings_data);
@@ -285,6 +288,7 @@ static void dmub_psr_force_static(struct dmub_psr *dmub)
 	union dmub_rb_cmd cmd;
 	struct dc_context *dc = dmub->ctx;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.psr_force_static.header.type = DMUB_CMD__PSR;
 	cmd.psr_force_static.header.sub_type = DMUB_CMD__PSR_FORCE_STATIC;
 	cmd.psr_enable.header.payload_bytes = 0;

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hwseq.c

@@ -123,7 +123,7 @@ void dcn21_optimize_pwr_state(
  * PHY will hang on the next mode set attempt.
  * if enable PLL follow by disable PLL (without executing lane enable/disable),
  * RDPCS_PHY_DP_MPLLB_STATE remains 1,
- * which indicate that PLL disable attempt actually didnt go through.
+ * which indicate that PLL disable attempt actually didn't go through.
  * As a workaround, insert PHY lane enable/disable before PLL disable.
  */
 void dcn21_PLAT_58856_wa(struct dc_state *context, struct pipe_ctx *pipe_ctx)
@@ -143,6 +143,7 @@ static bool dmub_abm_set_pipe(struct abm *abm, uint32_t otg_inst, uint32_t optio
 	struct dc_context *dc = abm->ctx;
 	uint32_t ramping_boundary = 0xFFFF;
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.abm_set_pipe.header.type = DMUB_CMD__ABM;
 	cmd.abm_set_pipe.header.sub_type = DMUB_CMD__ABM_SET_PIPE;
 	cmd.abm_set_pipe.abm_set_pipe_data.otg_inst = otg_inst;
@@ -212,6 +213,7 @@ bool dcn21_set_backlight_level(struct pipe_ctx *pipe_ctx,
 	if (abm && panel_cntl)
 		dmub_abm_set_pipe(abm, otg_inst, SET_ABM_PIPE_NORMAL, panel_cntl->inst);
 
+	memset(&cmd, 0, sizeof(cmd));
 	cmd.abm_set_backlight.header.type = DMUB_CMD__ABM;
 	cmd.abm_set_backlight.header.sub_type = DMUB_CMD__ABM_SET_BACKLIGHT;
 	cmd.abm_set_backlight.abm_set_backlight_data.frame_ramp = frame_ramp;