drm/amd/display: Refine disable VGA

bad case won't follow normal sense, it will not enable vga1 as usual, but vga2,3,4 is on.
Signed-off-by: Clark Zheng <clark.zheng@amd.com>
Reviewed-by: Tony Cheng <tony.cheng@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h

@@ -408,6 +408,9 @@ struct dce_hwseq_registers {
 	HWS_SF(, DOMAIN7_PG_STATUS, DOMAIN7_PGFSM_PWR_STATUS, mask_sh), \
 	HWS_SF(, DC_IP_REQUEST_CNTL, IP_REQUEST_EN, mask_sh), \
 	HWS_SF(, D1VGA_CONTROL, D1VGA_MODE_ENABLE, mask_sh),\
+	HWS_SF(, D2VGA_CONTROL, D2VGA_MODE_ENABLE, mask_sh),\
+	HWS_SF(, D3VGA_CONTROL, D3VGA_MODE_ENABLE, mask_sh),\
+	HWS_SF(, D4VGA_CONTROL, D4VGA_MODE_ENABLE, mask_sh),\
 	HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_ENABLE, mask_sh),\
 	HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_RENDER_START, mask_sh),\
 	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_BLON, mask_sh), \
@@ -497,7 +500,10 @@ struct dce_hwseq_registers {
 	type DENTIST_DISPCLK_WDIVIDER; \
 	type VGA_TEST_ENABLE; \
 	type VGA_TEST_RENDER_START; \
-	type D1VGA_MODE_ENABLE;
+	type D1VGA_MODE_ENABLE; \
+	type D2VGA_MODE_ENABLE; \
+	type D3VGA_MODE_ENABLE; \
+	type D4VGA_MODE_ENABLE;
 
 struct dce_hwseq_shift {
 	HWSEQ_REG_FIELD_LIST(uint8_t)

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -220,14 +220,24 @@ static void enable_power_gating_plane(
 static void disable_vga(
 	struct dce_hwseq *hws)
 {
-	unsigned int in_vga_mode = 0;
-
-	REG_GET(D1VGA_CONTROL, D1VGA_MODE_ENABLE, &in_vga_mode);
-
-	if (in_vga_mode == 0)
+	unsigned int in_vga1_mode = 0;
+	unsigned int in_vga2_mode = 0;
+	unsigned int in_vga3_mode = 0;
+	unsigned int in_vga4_mode = 0;
+
+	REG_GET(D1VGA_CONTROL, D1VGA_MODE_ENABLE, &in_vga1_mode);
+	REG_GET(D2VGA_CONTROL, D2VGA_MODE_ENABLE, &in_vga2_mode);
+	REG_GET(D3VGA_CONTROL, D3VGA_MODE_ENABLE, &in_vga3_mode);
+	REG_GET(D4VGA_CONTROL, D4VGA_MODE_ENABLE, &in_vga4_mode);
+
+	if (in_vga1_mode == 0 && in_vga2_mode == 0 &&
+			in_vga3_mode == 0 && in_vga4_mode == 0)
 		return;
 
 	REG_WRITE(D1VGA_CONTROL, 0);
+	REG_WRITE(D2VGA_CONTROL, 0);
+	REG_WRITE(D3VGA_CONTROL, 0);
+	REG_WRITE(D4VGA_CONTROL, 0);
 
 	/* HW Engineer's Notes:
 	 *  During switch from vga->extended, if we set the VGA_TEST_ENABLE and