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Message-ID: <18d7ea0a-64d7-4432-bd86-0d3b6e699175@suse.de>
Date: Mon, 29 Jul 2024 14:29:59 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: oushixiong1025@....com, Dave Airlie <airlied@...hat.com>
Cc: Jocelyn Falempe <jfalempe@...hat.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, Shixiong Ou <oushixiong@...inos.cn>
Subject: Re: [PATCH] drm/ast: add multiple connectors support
Hi
Am 11.07.24 um 11:01 schrieb oushixiong1025@....com:
> From: Shixiong Ou <oushixiong@...inos.cn>
>
> [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@...inos.cn>
> ---
> 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)
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