1 files changed, 35 insertions, 21 deletions

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 290e2532fab1..159c95b26d33 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -2169,19 +2169,31 @@ static const struct regmap_access_table tc_precious_table = {
 	.n_yes_ranges = ARRAY_SIZE(tc_precious_ranges),
 };
 
-static const struct regmap_range tc_non_writeable_ranges[] = {
-	regmap_reg_range(PPI_BUSYPPI, PPI_BUSYPPI),
-	regmap_reg_range(DSI_BUSYDSI, DSI_BUSYDSI),
-	regmap_reg_range(DSI_LANESTATUS0, DSI_INTSTATUS),
-	regmap_reg_range(TC_IDREG, SYSSTAT),
-	regmap_reg_range(GPIOI, GPIOI),
-	regmap_reg_range(DP0_LTSTAT, DP0_SNKLTCHGREQ),
-};
-
-static const struct regmap_access_table tc_writeable_table = {
-	.no_ranges = tc_non_writeable_ranges,
-	.n_no_ranges = ARRAY_SIZE(tc_non_writeable_ranges),
-};
+static bool tc_writeable_reg(struct device *dev, unsigned int reg)
+{
+	/* RO reg */
+	switch (reg) {
+	case PPI_BUSYPPI:
+	case DSI_BUSYDSI:
+	case DSI_LANESTATUS0:
+	case DSI_LANESTATUS1:
+	case DSI_INTSTATUS:
+	case TC_IDREG:
+	case SYSBOOT:
+	case SYSSTAT:
+	case GPIOI:
+	case DP0_LTSTAT:
+	case DP0_SNKLTCHGREQ:
+		return false;
+	}
+	/* WO reg */
+	switch (reg) {
+	case DSI_STARTDSI:
+	case DSI_INTCLR:
+		return true;
+	}
+	return tc_readable_reg(dev, reg);
+}
 
 static const struct regmap_config tc_regmap_config = {
 	.name = "tc358767",
@@ -2191,9 +2203,9 @@ static const struct regmap_config tc_regmap_config = {
 	.max_register = PLL_DBG,
 	.cache_type = REGCACHE_MAPLE,
 	.readable_reg = tc_readable_reg,
+	.writeable_reg = tc_writeable_reg,
 	.volatile_table = &tc_volatile_table,
 	.precious_table = &tc_precious_table,
-	.wr_table = &tc_writeable_table,
 	.reg_format_endian = REGMAP_ENDIAN_BIG,
 	.val_format_endian = REGMAP_ENDIAN_LITTLE,
 };
@@ -2229,11 +2241,11 @@ static irqreturn_t tc_irq_handler(int irq, void *arg)
 		bool h = val & INT_GPIO_H(tc->hpd_pin);
 		bool lc = val & INT_GPIO_LC(tc->hpd_pin);
 
-		dev_dbg(tc->dev, "GPIO%d: %s %s\n", tc->hpd_pin,
-			h ? "H" : "", lc ? "LC" : "");
-
-		if (h || lc)
+		if (h || lc) {
+			dev_dbg(tc->dev, "GPIO%d: %s %s\n", tc->hpd_pin,
+				h ? "H" : "", lc ? "LC" : "");
 			drm_kms_helper_hotplug_event(tc->bridge.dev);
+		}
 	}
 
 	regmap_write(tc->regmap, INTSTS_G, val);
@@ -2298,7 +2310,8 @@ static int tc_probe_dpi_bridge_endpoint(struct tc_data *tc)
 	/* port@1 is the DPI input/output port */
 	ret = drm_of_find_panel_or_bridge(dev->of_node, 1, 0, &panel, &bridge);
 	if (ret && ret != -ENODEV)
-		return ret;
+		return dev_err_probe(dev, ret,
+				     "Could not find DPI panel or bridge\n");
 
 	if (panel) {
 		bridge = devm_drm_panel_bridge_add(dev, panel);
@@ -2326,7 +2339,8 @@ static int tc_probe_edp_bridge_endpoint(struct tc_data *tc)
 	/* port@2 is the output port */
 	ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &panel, NULL);
 	if (ret && ret != -ENODEV)
-		return ret;
+		return dev_err_probe(dev, ret,
+				     "Could not find DSI panel or bridge\n");
 
 	if (panel) {
 		struct drm_bridge *panel_bridge;
@@ -2550,7 +2564,7 @@ static int tc_probe(struct i2c_client *client)
 		ret = tc_mipi_dsi_host_attach(tc);
 		if (ret) {
 			drm_bridge_remove(&tc->bridge);
-			return ret;
+			return dev_err_probe(dev, ret, "Failed to attach DSI host\n");
 		}
 	}