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Message-ID: <9f10d7cf-7173-e524-5e1e-c07ecc356159@kylinos.cn>
Date: Tue, 30 Jul 2024 09:20:02 +0800
From: oushixiong <oushixiong@...inos.cn>
To: Thomas Zimmermann <tzimmermann@...e.de>, 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
Subject: Re: [PATCH] drm/ast: add multiple connectors support
Just a VGA connector on the board.
Best regards
Shixiong
在 2024/7/29 20:29, Thomas Zimmermann 写道:
> 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;
>
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