Re: [PATCH] drm/ast: add multiple connectors support

Thomas Zimmermann <tzimmermann@xxxxxxx> · Mon, 29 Jul 2024 14:29:59 +0200

Hi

Am 11.07.24 um 11:01 schrieb oushixiong1025@xxxxxxx:
From: Shixiong Ou <oushixiong@xxxxxxxxxx>

[WHY]
The AST2600 tx_chip_types will be detected as AST_TX_DP, but some BMC
boards that use AST2600 use the VGA interface instead of the DP interface.
In this case, it will use Virtual connector as the DP is disconnected.

[HOW]
Allows multiple physical connectors to exist at the same time.

I have another question about this patch. Is there a physical connector 
for each type (VGA, DP) on your board? Or just one of them?

Best regards
Thomas


Signed-off-by: Shixiong Ou <oushixiong@xxxxxxxxxx>
---
  drivers/gpu/drm/ast/ast_drv.h  |  6 ++++-
  drivers/gpu/drm/ast/ast_main.c |  8 +++----
  drivers/gpu/drm/ast/ast_mode.c | 40 ++++++++++++++++++++--------------
  3 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index ba3d86973995..e326124b3fec 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -150,9 +150,13 @@ static inline struct ast_plane *to_ast_plane(struct drm_plane *plane)
   * BMC
   */
  
+#define MAX_CONNECTORS 2
+
  struct ast_bmc_connector {
  	struct drm_connector base;
-	struct drm_connector *physical_connector;
+
+	struct drm_connector *physical_connectors[MAX_CONNECTORS];
+	int count;
  };
  
  static inline struct ast_bmc_connector *
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 0637abb70361..428529749ae6 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -85,7 +85,7 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
  	if (!need_post) {
  		jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xa3, 0xff);
  		if (jreg & 0x80)
-			ast->tx_chip_types = AST_TX_SIL164_BIT;
+			ast->tx_chip_types |= AST_TX_SIL164_BIT;
  	}
  
  	if (IS_AST_GEN4(ast) || IS_AST_GEN5(ast) || IS_AST_GEN6(ast)) {
@@ -97,7 +97,7 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
  		jreg = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd1, 0xff);
  		switch (jreg) {
  		case 0x04:
-			ast->tx_chip_types = AST_TX_SIL164_BIT;
+			ast->tx_chip_types |= AST_TX_SIL164_BIT;
  			break;
  		case 0x08:
  			ast->dp501_fw_addr = drmm_kzalloc(dev, 32*1024, GFP_KERNEL);
@@ -110,12 +110,12 @@ static void ast_detect_tx_chip(struct ast_device *ast, bool need_post)
  			}
  			fallthrough;
  		case 0x0c:
-			ast->tx_chip_types = AST_TX_DP501_BIT;
+			ast->tx_chip_types |= AST_TX_DP501_BIT;
  		}
  	} else if (IS_AST_GEN7(ast)) {
  		if (ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xD1, TX_TYPE_MASK) ==
  		    ASTDP_DPMCU_TX) {
-			ast->tx_chip_types = AST_TX_ASTDP_BIT;
+			ast->tx_chip_types |= AST_TX_ASTDP_BIT;
  			ast_dp_launch(&ast->base);
  		}
  	}
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 6695af70768f..31a49d32e506 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -1717,7 +1717,8 @@ static int ast_bmc_connector_helper_detect_ctx(struct drm_connector *connector,
  					       bool force)
  {
  	struct ast_bmc_connector *bmc_connector = to_ast_bmc_connector(connector);
-	struct drm_connector *physical_connector = bmc_connector->physical_connector;
+	struct drm_connector *physical_connector;
+	int i, count = bmc_connector->count;
  
  	/*
  	 * Most user-space compositors cannot handle more than one connected
@@ -1730,10 +1731,13 @@ static int ast_bmc_connector_helper_detect_ctx(struct drm_connector *connector,
  	 *        than one connector per CRTC. The BMC should always be connected.
  	 */
  
-	if (physical_connector && physical_connector->status == connector_status_disconnected)
-		return connector_status_connected;
+	for (i = 0; i < count; i++) {
+		physical_connector = bmc_connector->physical_connectors[i];
+		if (physical_connector && physical_connector->status == connector_status_connected)
+			return connector_status_disconnected;
+	}
  
-	return connector_status_disconnected;
+	return connector_status_connected;
  }
  
  static int ast_bmc_connector_helper_get_modes(struct drm_connector *connector)
@@ -1756,10 +1760,11 @@ static const struct drm_connector_funcs ast_bmc_connector_funcs = {
  
  static int ast_bmc_connector_init(struct drm_device *dev,
  				  struct ast_bmc_connector *bmc_connector,
-				  struct drm_connector *physical_connector)
+				  struct drm_connector **physical_connector,
+				  int count)
  {
  	struct drm_connector *connector = &bmc_connector->base;
-	int ret;
+	int i, ret;
  
  	ret = drm_connector_init(dev, connector, &ast_bmc_connector_funcs,
  				 DRM_MODE_CONNECTOR_VIRTUAL);
@@ -1768,13 +1773,16 @@ static int ast_bmc_connector_init(struct drm_device *dev,
  
  	drm_connector_helper_add(connector, &ast_bmc_connector_helper_funcs);
  
-	bmc_connector->physical_connector = physical_connector;
+	for (i = 0; i < count; i++)
+		bmc_connector->physical_connectors[i] = physical_connector[i];
+	bmc_connector->count = count;
  
  	return 0;
  }
  
  static int ast_bmc_output_init(struct ast_device *ast,
-			       struct drm_connector *physical_connector)
+			       struct drm_connector **physical_connector,
+			       int count)
  {
  	struct drm_device *dev = &ast->base;
  	struct drm_crtc *crtc = &ast->crtc;
@@ -1790,7 +1798,7 @@ static int ast_bmc_output_init(struct ast_device *ast,
  		return ret;
  	encoder->possible_crtcs = drm_crtc_mask(crtc);
  
-	ret = ast_bmc_connector_init(dev, bmc_connector, physical_connector);
+	ret = ast_bmc_connector_init(dev, bmc_connector, physical_connector, count);
  	if (ret)
  		return ret;
  
@@ -1852,8 +1860,8 @@ static const struct drm_mode_config_funcs ast_mode_config_funcs = {
  int ast_mode_config_init(struct ast_device *ast)
  {
  	struct drm_device *dev = &ast->base;
-	struct drm_connector *physical_connector = NULL;
-	int ret;
+	struct drm_connector *physical_connector[MAX_CONNECTORS] = {NULL};
+	int count, ret;
  
  	ret = drmm_mutex_init(dev, &ast->modeset_lock);
  	if (ret)
@@ -1897,27 +1905,27 @@ int ast_mode_config_init(struct ast_device *ast)
  		ret = ast_vga_output_init(ast);
  		if (ret)
  			return ret;
-		physical_connector = &ast->output.vga.connector;
+		physical_connector[count++] = &ast->output.vga.connector;
  	}
  	if (ast->tx_chip_types & AST_TX_SIL164_BIT) {
  		ret = ast_sil164_output_init(ast);
  		if (ret)
  			return ret;
-		physical_connector = &ast->output.sil164.connector;
+		physical_connector[count++] = &ast->output.sil164.connector;
  	}
  	if (ast->tx_chip_types & AST_TX_DP501_BIT) {
  		ret = ast_dp501_output_init(ast);
  		if (ret)
  			return ret;
-		physical_connector = &ast->output.dp501.connector;
+		physical_connector[count++] = &ast->output.dp501.connector;
  	}
  	if (ast->tx_chip_types & AST_TX_ASTDP_BIT) {
  		ret = ast_astdp_output_init(ast);
  		if (ret)
  			return ret;
-		physical_connector = &ast->output.astdp.connector;
+		physical_connector[count++] = &ast->output.astdp.connector;
  	}
-	ret = ast_bmc_output_init(ast, physical_connector);
+	ret = ast_bmc_output_init(ast, physical_connector, count);
  	if (ret)
  		return ret;
  

--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)







