From: Jocelyn Falempe <jfalempe@redhat.com>
To: Thomas Zimmermann <tzimmermann@suse.de>,
airlied@redhat.com, kuohsiang_chou@aspeedtech.com,
jammy_huang@aspeedtech.com, jani.nikula@linux.intel.com,
dianders@chromium.org
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v4 2/2] drm/ast: report connection status on Display Port.
Date: Wed, 12 Jul 2023 16:39:54 +0200 [thread overview]
Message-ID: <af5ab6ed-2f8f-f02e-bc5d-9d13d9e8c87a@redhat.com> (raw)
In-Reply-To: <e37d95f9-bcb5-237a-4c7e-2ae38f8b247d@suse.de>
On 12/07/2023 15:55, Thomas Zimmermann wrote:
> Hi
>
> Am 12.07.23 um 15:27 schrieb Jocelyn Falempe:
>> Aspeed always report the display port as "connected", because it
>> doesn't set a .detect callback.
>> Fix this by providing the proper detect callback for astdp and dp501.
>>
>> This also fixes the following regression:
>> Since commit fae7d186403e ("drm/probe-helper: Default to 640x480 if no
>> EDID on DP")
>> The default resolution is now 640x480 when no monitor is connected. But
>> Aspeed graphics is mostly used in servers, where no monitor is attached.
>> This also affects the remote BMC resolution to 640x480, which is
>> inconvenient, and breaks the anaconda installer.
>
> The formatting of these paragraphs still looks off.
ok, I think it's because I start a new line in the middle of the
sentence, before "The default resolution ..." ?
I will fix that.
>
> It just occured to me that you probably want output polling to make
> detection work dynamically. See an old patch of mine on how that works:
>
> https://patchwork.freedesktop.org/patch/488460/
So, if I understand well, I just need to add:
connector->polled = DRM_CONNECTOR_POLL_CONNECT |
DRM_CONNECTOR_POLL_DISCONNECT;
and call drm_kms_helper_poll_init() ?
>
> We also get an interrupt when the connector state changes, but IDK how
> that has to be handled. So polling is the next best thing. Sorry for
> missing this in the earlier reviews.
Yes, there is no irq configured in the ast driver, so let's fallback to
polling.
--
Jocelyn
>
> Best regards
> Thomas
>
>>
>> v2: Add .detect callback to the dp/dp501 connector (Jani Nikula)
>> v3: Use .detect_ctx callback, and refactors (Thomas Zimmermann)
>> Add a BMC virtual connector
>> v4: Better indent detect_ctx() functions (Thomas Zimmermann)
>>
>> Fixes: fae7d186403e ("drm/probe-helper: Default to 640x480 if no EDID
>> on DP")
>> Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
>> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
>> ---
>> drivers/gpu/drm/ast/ast_dp.c | 11 ++++++++++
>> drivers/gpu/drm/ast/ast_dp501.c | 37 ++++++++++++++++++++++-----------
>> drivers/gpu/drm/ast/ast_drv.h | 2 ++
>> drivers/gpu/drm/ast/ast_mode.c | 25 ++++++++++++++++++++++
>> 4 files changed, 63 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c
>> index 6dc1a09504e1..bf78f3d4aa3f 100644
>> --- a/drivers/gpu/drm/ast/ast_dp.c
>> +++ b/drivers/gpu/drm/ast/ast_dp.c
>> @@ -7,6 +7,17 @@
>> #include <drm/drm_print.h>
>> #include "ast_drv.h"
>> +bool ast_astdp_is_connected(struct ast_device *ast)
>> +{
>> + if (!ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1,
>> ASTDP_MCU_FW_EXECUTING))
>> + return false;
>> + if (!ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xDC,
>> ASTDP_LINK_SUCCESS))
>> + return false;
>> + if (!ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xDF, ASTDP_HPD))
>> + return false;
>> + return true;
>> +}
>> +
>> int ast_astdp_read_edid(struct drm_device *dev, u8 *ediddata)
>> {
>> struct ast_device *ast = to_ast_device(dev);
>> diff --git a/drivers/gpu/drm/ast/ast_dp501.c
>> b/drivers/gpu/drm/ast/ast_dp501.c
>> index a5d285850ffb..f10d53b0c94f 100644
>> --- a/drivers/gpu/drm/ast/ast_dp501.c
>> +++ b/drivers/gpu/drm/ast/ast_dp501.c
>> @@ -272,11 +272,9 @@ static bool ast_launch_m68k(struct drm_device *dev)
>> return true;
>> }
>> -bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
>> +bool ast_dp501_is_connected(struct ast_device *ast)
>> {
>> - struct ast_device *ast = to_ast_device(dev);
>> - u32 i, boot_address, offset, data;
>> - u32 *pEDIDidx;
>> + u32 boot_address, offset, data;
>> if (ast->config_mode == ast_use_p2a) {
>> boot_address = get_fw_base(ast);
>> @@ -292,14 +290,6 @@ bool ast_dp501_read_edid(struct drm_device *dev,
>> u8 *ediddata)
>> data = ast_mindwm(ast, boot_address + offset);
>> if (!(data & AST_DP501_PNP_CONNECTED))
>> return false;
>> -
>> - /* Read EDID */
>> - offset = AST_DP501_EDID_DATA;
>> - for (i = 0; i < 128; i += 4) {
>> - data = ast_mindwm(ast, boot_address + offset + i);
>> - pEDIDidx = (u32 *)(ediddata + i);
>> - *pEDIDidx = data;
>> - }
>> } else {
>> if (!ast->dp501_fw_buf)
>> return false;
>> @@ -319,7 +309,30 @@ bool ast_dp501_read_edid(struct drm_device *dev,
>> u8 *ediddata)
>> data = readl(ast->dp501_fw_buf + offset);
>> if (!(data & AST_DP501_PNP_CONNECTED))
>> return false;
>> + }
>> + return true;
>> +}
>> +
>> +bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
>> +{
>> + struct ast_device *ast = to_ast_device(dev);
>> + u32 i, boot_address, offset, data;
>> + u32 *pEDIDidx;
>> +
>> + if (!ast_dp501_is_connected(ast))
>> + return false;
>> +
>> + if (ast->config_mode == ast_use_p2a) {
>> + boot_address = get_fw_base(ast);
>> + /* Read EDID */
>> + offset = AST_DP501_EDID_DATA;
>> + for (i = 0; i < 128; i += 4) {
>> + data = ast_mindwm(ast, boot_address + offset + i);
>> + pEDIDidx = (u32 *)(ediddata + i);
>> + *pEDIDidx = data;
>> + }
>> + } else {
>> /* Read EDID */
>> offset = AST_DP501_EDID_DATA;
>> for (i = 0; i < 128; i += 4) {
>> diff --git a/drivers/gpu/drm/ast/ast_drv.h
>> b/drivers/gpu/drm/ast/ast_drv.h
>> index c9659e72002f..848a9f1403e8 100644
>> --- a/drivers/gpu/drm/ast/ast_drv.h
>> +++ b/drivers/gpu/drm/ast/ast_drv.h
>> @@ -514,6 +514,7 @@ void ast_patch_ahb_2500(struct ast_device *ast);
>> /* ast dp501 */
>> void ast_set_dp501_video_output(struct drm_device *dev, u8 mode);
>> bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size);
>> +bool ast_dp501_is_connected(struct ast_device *ast);
>> bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata);
>> u8 ast_get_dp501_max_clk(struct drm_device *dev);
>> void ast_init_3rdtx(struct drm_device *dev);
>> @@ -522,6 +523,7 @@ void ast_init_3rdtx(struct drm_device *dev);
>> struct ast_i2c_chan *ast_i2c_create(struct drm_device *dev);
>> /* aspeed DP */
>> +bool ast_astdp_is_connected(struct ast_device *ast);
>> int ast_astdp_read_edid(struct drm_device *dev, u8 *ediddata);
>> void ast_dp_launch(struct drm_device *dev);
>> void ast_dp_power_on_off(struct drm_device *dev, bool no);
>> diff --git a/drivers/gpu/drm/ast/ast_mode.c
>> b/drivers/gpu/drm/ast/ast_mode.c
>> index 1a8293162fec..75a84817a57d 100644
>> --- a/drivers/gpu/drm/ast/ast_mode.c
>> +++ b/drivers/gpu/drm/ast/ast_mode.c
>> @@ -1582,8 +1582,21 @@ static int
>> ast_dp501_connector_helper_get_modes(struct drm_connector *connector)
>> return 0;
>> }
>> +static int ast_dp501_connector_helper_detect_ctx(struct drm_connector
>> *connector,
>> + struct drm_modeset_acquire_ctx *ctx,
>> + bool force)
>> +{
>> + struct ast_device *ast = to_ast_device(connector->dev);
>> +
>> + if (ast_dp501_is_connected(ast))
>> + return connector_status_connected;
>> + return connector_status_disconnected;
>> +}
>> +
>> +
>> static const struct drm_connector_helper_funcs
>> ast_dp501_connector_helper_funcs = {
>> .get_modes = ast_dp501_connector_helper_get_modes,
>> + .detect_ctx = ast_dp501_connector_helper_detect_ctx,
>> };
>> static const struct drm_connector_funcs ast_dp501_connector_funcs = {
>> @@ -1680,8 +1693,20 @@ static int
>> ast_astdp_connector_helper_get_modes(struct drm_connector *connector)
>> return 0;
>> }
>> +static int ast_astdp_connector_helper_detect_ctx(struct drm_connector
>> *connector,
>> + struct drm_modeset_acquire_ctx *ctx,
>> + bool force)
>> +{
>> + struct ast_device *ast = to_ast_device(connector->dev);
>> +
>> + if (ast_astdp_is_connected(ast))
>> + return connector_status_connected;
>> + return connector_status_disconnected;
>> +}
>> +
>> static const struct drm_connector_helper_funcs
>> ast_astdp_connector_helper_funcs = {
>> .get_modes = ast_astdp_connector_helper_get_modes,
>> + .detect_ctx = ast_astdp_connector_helper_detect_ctx,
>> };
>> static const struct drm_connector_funcs ast_astdp_connector_funcs = {
>
next prev parent reply other threads:[~2023-07-12 14:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-12 13:27 [PATCH v4 1/2] drm/ast: Add BMC virtual connector Jocelyn Falempe
2023-07-12 13:27 ` [PATCH v4 2/2] drm/ast: report connection status on Display Port Jocelyn Falempe
2023-07-12 13:55 ` Thomas Zimmermann
2023-07-12 14:39 ` Jocelyn Falempe [this message]
2023-07-12 14:51 ` Thomas Zimmermann
2023-07-12 13:59 ` [PATCH v4 1/2] drm/ast: Add BMC virtual connector Thomas Zimmermann
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