drm/i2c: tda998x: allow re-use of tda998x support code

Allow the TDA998x code to be used with standard drm_encoder
implementations.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 110 insertions, 69 deletions

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 5a738ad0c241..64e120c5299a 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -730,12 +730,9 @@ tda998x_configure_audio(struct tda998x_priv *priv,
 
 /* DRM encoder functions */
 
-static void
-tda998x_encoder_set_config(struct drm_encoder *encoder, void *params)
+static void tda998x_encoder_set_config(struct tda998x_priv *priv,
+				       const struct tda998x_encoder_params *p)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
-	struct tda998x_encoder_params *p = params;
-
 	priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(p->swap_a) |
 			    (p->mirr_a ? VIP_CNTRL_0_MIRR_A : 0) |
 			    VIP_CNTRL_0_SWAP_B(p->swap_b) |
@@ -752,11 +749,8 @@ tda998x_encoder_set_config(struct drm_encoder *encoder, void *params)
 	priv->params = *p;
 }
 
-static void
-tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
+static void tda998x_encoder_dpms(struct tda998x_priv *priv, int mode)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
-
 	/* we only care about on or off: */
 	if (mode != DRM_MODE_DPMS_ON)
 		mode = DRM_MODE_DPMS_OFF;
@@ -806,9 +800,8 @@ tda998x_encoder_mode_fixup(struct drm_encoder *encoder,
 	return true;
 }
 
-static int
-tda998x_encoder_mode_valid(struct drm_encoder *encoder,
-			  struct drm_display_mode *mode)
+static int tda998x_encoder_mode_valid(struct tda998x_priv *priv,
+				      struct drm_display_mode *mode)
 {
 	if (mode->clock > 150000)
 		return MODE_CLOCK_HIGH;
@@ -820,11 +813,10 @@ tda998x_encoder_mode_valid(struct drm_encoder *encoder,
 }
 
 static void
-tda998x_encoder_mode_set(struct drm_encoder *encoder,
-			struct drm_display_mode *mode,
-			struct drm_display_mode *adjusted_mode)
+tda998x_encoder_mode_set(struct tda998x_priv *priv,
+			 struct drm_display_mode *mode,
+			 struct drm_display_mode *adjusted_mode)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
 	uint16_t ref_pix, ref_line, n_pix, n_line;
 	uint16_t hs_pix_s, hs_pix_e;
 	uint16_t vs1_pix_s, vs1_pix_e, vs1_line_s, vs1_line_e;
@@ -1012,20 +1004,16 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
 }
 
 static enum drm_connector_status
-tda998x_encoder_detect(struct drm_encoder *encoder,
-		      struct drm_connector *connector)
+tda998x_encoder_detect(struct tda998x_priv *priv)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
 	uint8_t val = cec_read(priv, REG_CEC_RXSHPDLEV);
 
 	return (val & CEC_RXSHPDLEV_HPD) ? connector_status_connected :
 			connector_status_disconnected;
 }
 
-static int
-read_edid_block(struct drm_encoder *encoder, uint8_t *buf, int blk)
+static int read_edid_block(struct tda998x_priv *priv, uint8_t *buf, int blk)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
 	uint8_t offset, segptr;
 	int ret, i;
 
@@ -1079,10 +1067,8 @@ read_edid_block(struct drm_encoder *encoder, uint8_t *buf, int blk)
 	return 0;
 }
 
-static uint8_t *
-do_get_edid(struct drm_encoder *encoder)
+static uint8_t *do_get_edid(struct tda998x_priv *priv)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
 	int j, valid_extensions = 0;
 	uint8_t *block, *new;
 	bool print_bad_edid = drm_debug & DRM_UT_KMS;
@@ -1094,7 +1080,7 @@ do_get_edid(struct drm_encoder *encoder)
 		reg_clear(priv, REG_TX4, TX4_PD_RAM);
 
 	/* base block fetch */
-	if (read_edid_block(encoder, block, 0))
+	if (read_edid_block(priv, block, 0))
 		goto fail;
 
 	if (!drm_edid_block_valid(block, 0, print_bad_edid))
@@ -1111,7 +1097,7 @@ do_get_edid(struct drm_encoder *encoder)
 
 	for (j = 1; j <= block[0x7e]; j++) {
 		uint8_t *ext_block = block + (valid_extensions + 1) * EDID_LENGTH;
-		if (read_edid_block(encoder, ext_block, j))
+		if (read_edid_block(priv, ext_block, j))
 			goto fail;
 
 		if (!drm_edid_block_valid(ext_block, j, print_bad_edid))
@@ -1144,11 +1130,10 @@ fail:
 }
 
 static int
-tda998x_encoder_get_modes(struct drm_encoder *encoder,
-			 struct drm_connector *connector)
+tda998x_encoder_get_modes(struct tda998x_priv *priv,
+			  struct drm_connector *connector)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
-	struct edid *edid = (struct edid *)do_get_edid(encoder);
+	struct edid *edid = (struct edid *)do_get_edid(priv);
 	int n = 0;
 
 	if (edid) {
@@ -1161,18 +1146,14 @@ tda998x_encoder_get_modes(struct drm_encoder *encoder,
 	return n;
 }
 
-static int
-tda998x_encoder_create_resources(struct drm_encoder *encoder,
-				struct drm_connector *connector)
+static void tda998x_encoder_set_polling(struct tda998x_priv *priv,
+					struct drm_connector *connector)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
-
 	if (priv->hdmi->irq)
 		connector->polled = DRM_CONNECTOR_POLL_HPD;
 	else
 		connector->polled = DRM_CONNECTOR_POLL_CONNECT |
 			DRM_CONNECTOR_POLL_DISCONNECT;
-	return 0;
 }
 
 static int
@@ -1185,11 +1166,8 @@ tda998x_encoder_set_property(struct drm_encoder *encoder,
 	return 0;
 }
 
-static void
-tda998x_encoder_destroy(struct drm_encoder *encoder)
+static void tda998x_destroy(struct tda998x_priv *priv)
 {
-	struct tda998x_priv *priv = to_tda998x_priv(encoder);
-
 	/* disable all IRQs and free the IRQ handler */
 	cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
 	reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
@@ -1198,22 +1176,77 @@ tda998x_encoder_destroy(struct drm_encoder *encoder)
 
 	if (priv->cec)
 		i2c_unregister_device(priv->cec);
+}
+
+/* Slave encoder support */
+
+static void
+tda998x_encoder_slave_set_config(struct drm_encoder *encoder, void *params)
+{
+	tda998x_encoder_set_config(to_tda998x_priv(encoder), params);
+}
+
+static void tda998x_encoder_slave_destroy(struct drm_encoder *encoder)
+{
+	struct tda998x_priv *priv = to_tda998x_priv(encoder);
+
+	tda998x_destroy(priv);
 	drm_i2c_encoder_destroy(encoder);
 	kfree(priv);
 }
 
-static struct drm_encoder_slave_funcs tda998x_encoder_funcs = {
-	.set_config = tda998x_encoder_set_config,
-	.destroy = tda998x_encoder_destroy,
-	.dpms = tda998x_encoder_dpms,
+static void tda998x_encoder_slave_dpms(struct drm_encoder *encoder, int mode)
+{
+	tda998x_encoder_dpms(to_tda998x_priv(encoder), mode);
+}
+
+static int tda998x_encoder_slave_mode_valid(struct drm_encoder *encoder,
+					    struct drm_display_mode *mode)
+{
+	return tda998x_encoder_mode_valid(to_tda998x_priv(encoder), mode);
+}
+
+static void
+tda998x_encoder_slave_mode_set(struct drm_encoder *encoder,
+			       struct drm_display_mode *mode,
+			       struct drm_display_mode *adjusted_mode)
+{
+	tda998x_encoder_mode_set(to_tda998x_priv(encoder), mode, adjusted_mode);
+}
+
+static enum drm_connector_status
+tda998x_encoder_slave_detect(struct drm_encoder *encoder,
+			     struct drm_connector *connector)
+{
+	return tda998x_encoder_detect(to_tda998x_priv(encoder));
+}
+
+static int tda998x_encoder_slave_get_modes(struct drm_encoder *encoder,
+					   struct drm_connector *connector)
+{
+	return tda998x_encoder_get_modes(to_tda998x_priv(encoder), connector);
+}
+
+static int
+tda998x_encoder_slave_create_resources(struct drm_encoder *encoder,
+				       struct drm_connector *connector)
+{
+	tda998x_encoder_set_polling(to_tda998x_priv(encoder), connector);
+	return 0;
+}
+
+static struct drm_encoder_slave_funcs tda998x_encoder_slave_funcs = {
+	.set_config = tda998x_encoder_slave_set_config,
+	.destroy = tda998x_encoder_slave_destroy,
+	.dpms = tda998x_encoder_slave_dpms,
 	.save = tda998x_encoder_save,
 	.restore = tda998x_encoder_restore,
 	.mode_fixup = tda998x_encoder_mode_fixup,
-	.mode_valid = tda998x_encoder_mode_valid,
-	.mode_set = tda998x_encoder_mode_set,
-	.detect = tda998x_encoder_detect,
-	.get_modes = tda998x_encoder_get_modes,
-	.create_resources = tda998x_encoder_create_resources,
+	.mode_valid = tda998x_encoder_slave_mode_valid,
+	.mode_set = tda998x_encoder_slave_mode_set,
+	.detect = tda998x_encoder_slave_detect,
+	.get_modes = tda998x_encoder_slave_get_modes,
+	.create_resources = tda998x_encoder_slave_create_resources,
 	.set_property = tda998x_encoder_set_property,
 };
 
@@ -1231,20 +1264,12 @@ tda998x_remove(struct i2c_client *client)
 	return 0;
 }
 
-static int
-tda998x_encoder_init(struct i2c_client *client,
-		    struct drm_device *dev,
-		    struct drm_encoder_slave *encoder_slave)
+static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
 {
-	struct tda998x_priv *priv;
 	struct device_node *np = client->dev.of_node;
 	u32 video;
 	int rev_lo, rev_hi, ret;
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
 	priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
 	priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
 	priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
@@ -1252,17 +1277,11 @@ tda998x_encoder_init(struct i2c_client *client,
 	priv->current_page = 0xff;
 	priv->hdmi = client;
 	priv->cec = i2c_new_dummy(client->adapter, 0x34);
-	if (!priv->cec) {
-		kfree(priv);
+	if (!priv->cec)
 		return -ENODEV;
-	}
 
-	priv->encoder = &encoder_slave->base;
 	priv->dpms = DRM_MODE_DPMS_OFF;
 
-	encoder_slave->slave_priv = priv;
-	encoder_slave->slave_funcs = &tda998x_encoder_funcs;
-
 	/* wake up the device: */
 	cec_write(priv, REG_CEC_ENAMODS,
 			CEC_ENAMODS_EN_RXSENS | CEC_ENAMODS_EN_HDMI);
@@ -1365,12 +1384,34 @@ fail:
 	 */
 	if (priv->cec)
 		i2c_unregister_device(priv->cec);
-	kfree(priv);
-	encoder_slave->slave_priv = NULL;
-	encoder_slave->slave_funcs = NULL;
 	return -ENXIO;
 }
 
+static int tda998x_encoder_init(struct i2c_client *client,
+				struct drm_device *dev,
+				struct drm_encoder_slave *encoder_slave)
+{
+	struct tda998x_priv *priv;
+	int ret;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->encoder = &encoder_slave->base;
+
+	ret = tda998x_create(client, priv);
+	if (ret) {
+		kfree(priv);
+		return ret;
+	}
+
+	encoder_slave->slave_priv = priv;
+	encoder_slave->slave_funcs = &tda998x_encoder_slave_funcs;
+
+	return 0;
+}
+
 #ifdef CONFIG_OF
 static const struct of_device_id tda998x_dt_ids[] = {
 	{ .compatible = "nxp,tda998x", },