drm/ssd130x: Add a controller family id to the device info data

To allow the driver to have a per Solomon display controller modesetting
pipeline and support aother controller families besides SSD130x.
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231014071520.1342189-3-javierm@redhat.com

drivers/gpu/drm/solomon/ssd130x-i2c.c

@@ -54,6 +54,7 @@ static void ssd130x_i2c_shutdown(struct i2c_client *client)
 }
 
 static const struct of_device_id ssd130x_of_match[] = {
+	/* ssd130x family */
 	{
 		.compatible = "sinowealth,sh1106",
 		.data = &ssd130x_variants[SH1106_ID],

drivers/gpu/drm/solomon/ssd130x-spi.c

@@ -108,6 +108,7 @@ static void ssd130x_spi_shutdown(struct spi_device *spi)
 }
 
 static const struct of_device_id ssd130x_of_match[] = {
+	/* ssd130x family */
 	{
 		.compatible = "sinowealth,sh1106",
 		.data = &ssd130x_variants[SH1106_ID],
@@ -142,6 +143,7 @@ MODULE_DEVICE_TABLE(of, ssd130x_of_match);
  * not be needed for this driver to match the registered SPI devices.
  */
 static const struct spi_device_id ssd130x_spi_table[] = {
+	/* ssd130x family */
 	{ "sh1106",  SH1106_ID },
 	{ "ssd1305", SSD1305_ID },
 	{ "ssd1306", SSD1306_ID },

drivers/gpu/drm/solomon/ssd130x.c

@@ -104,6 +104,7 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.default_width = 132,
 		.default_height = 64,
 		.page_mode_only = 1,
+		.family_id = SSD130X_FAMILY,
 	},
 	[SSD1305_ID] = {
 		.default_vcomh = 0x34,
@@ -111,6 +112,7 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.default_dclk_frq = 7,
 		.default_width = 132,
 		.default_height = 64,
+		.family_id = SSD130X_FAMILY,
 	},
 	[SSD1306_ID] = {
 		.default_vcomh = 0x20,
@@ -119,6 +121,7 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.need_chargepump = 1,
 		.default_width = 128,
 		.default_height = 64,
+		.family_id = SSD130X_FAMILY,
 	},
 	[SSD1307_ID] = {
 		.default_vcomh = 0x20,
@@ -127,6 +130,7 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.need_pwm = 1,
 		.default_width = 128,
 		.default_height = 39,
+		.family_id = SSD130X_FAMILY,
 	},
 	[SSD1309_ID] = {
 		.default_vcomh = 0x34,
@@ -134,6 +138,7 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.default_dclk_frq = 10,
 		.default_width = 128,
 		.default_height = 64,
+		.family_id = SSD130X_FAMILY,
 	}
 };
 EXPORT_SYMBOL_NS_GPL(ssd130x_variants, DRM_SSD130X);

drivers/gpu/drm/solomon/ssd130x.h

@@ -24,7 +24,12 @@
 #define SSD130X_DATA				0x40
 #define SSD130X_COMMAND				0x80
 
+enum ssd130x_family_ids {
+	SSD130X_FAMILY
+};
+
 enum ssd130x_variants {
+	/* ssd130x family */
 	SH1106_ID,
 	SSD1305_ID,
 	SSD1306_ID,
@@ -42,6 +47,8 @@ struct ssd130x_deviceinfo {
 	bool need_pwm;
 	bool need_chargepump;
 	bool page_mode_only;
+
+	enum ssd130x_family_ids family_id;
 };
 
 struct ssd130x_device {