drm: msm: dsi-staging: hijack 60hz backlight control for 90hz

This is a hack with vibe contribution from chatgpt. We are defining
90hz's blacklight control to just redirect to 60hz's as we have noticed
does not have the issue of werid green tint when hjacking 120hz's bc.

This fixes the twitching and sudden brightness increase when switching
refresh rate to 90hz from 120hz.
It DOES NOT fix the werid colouring.

Depends on Xiaomi's drm changes.

Signed-off-by: Yahya Wessam <yahyawessam2002@gmail.com>

Author: vbajs

drivers/gpu/drm/msm/dsi-staging/dsi_defs.h

@@ -316,6 +316,7 @@ enum dsi_cmd_set_type {
 	DSI_CMD_SET_DISP_DC_CRC_SETTING_60HZ,
 	DSI_CMD_SET_DISP_DC_CRC_SETTING_120HZ,
 	DSI_CMD_SET_DISP_BC_120HZ,
+	DSI_CMD_SET_DISP_BC_90HZ,
 	DSI_CMD_SET_DISP_BC_60HZ,
 	DSI_CMD_SET_DOZE_HBM,
 	DSI_CMD_SET_DOZE_LBM,

drivers/gpu/drm/msm/dsi-staging/dsi_display.c

@@ -94,6 +94,8 @@ void dsi_display_panel_gamma_mode_change(struct dsi_display *display,
 
 	if (adj_mode->timing.refresh_rate == 120)
 		rc = panel_disp_param_send_lock(display->panel, DISPPARAM_BC_120HZ);
+	else if (adj_mode->timing.refresh_rate == 90)
+		rc = panel_disp_param_send_lock(display->panel, DISPPARAM_BC_90HZ);
 	else if (adj_mode->timing.refresh_rate == 60)
 		rc = panel_disp_param_send_lock(display->panel, DISPPARAM_BC_60HZ);
 
@@ -7119,7 +7121,7 @@ int dsi_display_set_mode(struct dsi_display *display,
 		goto error;
 	}
 
-	if (adj_mode.timing.refresh_rate == 60)
+	if (adj_mode.timing.refresh_rate == 60 || adj_mode.timing.refresh_rate == 90)
 		dsi_display_panel_gamma_mode_change(display, &adj_mode);
 
 	if (!display->panel->cur_mode) {

drivers/gpu/drm/msm/dsi-staging/dsi_panel.c

@@ -2010,6 +2010,7 @@ const char *cmd_set_prop_map[DSI_CMD_SET_MAX] = {
 	"qcom,mdss-dsi-dispparam-60hz-dc-crc-setting-command",
 	"qcom,mdss-dsi-dispparam-120hz-dc-crc-setting-command",
 	"qcom,mdss-dsi-dispparam-bc-120hz-command",
+	"qcom,mdss-dsi-dispparam-bc-90hz-command",
 	"qcom,mdss-dsi-dispparam-bc-60hz-command",
 	"qcom,mdss-dsi-doze-hbm-command",
 	"qcom,mdss-dsi-doze-lbm-command",
@@ -2048,6 +2049,7 @@ const char *cmd_set_state_map[DSI_CMD_SET_MAX] = {
 	"qcom,mdss-dsi-dispparam-60hz-dc-crc-setting-command-state",
 	"qcom,mdss-dsi-dispparam-120hz-dc-crc-setting-command-state",
 	"qcom,mdss-dsi-dispparam-bc-120hz-command-state",
+	"qcom,mdss-dsi-dispparam-bc-90hz-command-state",
 	"qcom,mdss-dsi-dispparam-bc-60hz-command-state",
 	"qcom,mdss-dsi-doze-hbm-command-state",
 	"qcom,mdss-dsi-doze-lbm-command-state",
@@ -4848,14 +4850,20 @@ int panel_disp_param_send_lock(struct dsi_panel *panel, int param)
 		pr_info("BC 120hz\n");
 		rc = dsi_panel_tx_cmd_set(panel, DSI_CMD_SET_DISP_BC_120HZ);
 		break;
-	case DISPPARAM_BC_60HZ:
-		pr_info("BC 60hz\n");
-		rc = dsi_panel_tx_cmd_set(panel, DSI_CMD_SET_DISP_BC_60HZ);
-		break;
 	default:
 		break;
 	}
 
+	temp = param & 0x000F0000;
+	if (temp == DISPPARAM_BC_60HZ) {
+		pr_info("BC 60hz\n");
+		rc = dsi_panel_tx_cmd_set(panel, DSI_CMD_SET_DISP_BC_60HZ);
+	} else if (temp == DISPPARAM_BC_90HZ) {
+		pr_info("BC 90hz\n");
+		rc = dsi_panel_tx_cmd_set(panel, DSI_CMD_SET_DISP_BC_90HZ);
+	} else {
+	}
+
 	temp = param & 0x00F00000;
 	switch (temp) {
 	case DISPPARAM_DOZE_BRIGHTNESS_HBM:

drivers/gpu/drm/msm/dsi-staging/dsi_panel_mi.h

@@ -30,6 +30,7 @@ enum DISPPARAM_MODE {
     DISPPARAM_DC_ON = 0x40000,
     DISPPARAM_DC_OFF = 0x50000,
     DISPPARAM_BC_120HZ = 0x60000,
+    DISPPARAM_BC_90HZ = 0x70000,
     DISPPARAM_BC_60HZ = 0x70000,
     DISPPARAM_HBM_OFF = 0xF0000,
     DISPPARAM_DOZE_BRIGHTNESS_HBM = 0x600000,