From: Kuogee Hsieh <khsieh@codeaurora.org> To: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org, vkoul@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org Cc: abhinavk@codeaurora.org, aravindh@codeaurora.org, khsieh@codeaurora.org, freedreno@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Date: Wed, 28 Jul 2021 14:30:54 -0700 [thread overview] Message-ID: <1627507854-16733-1-git-send-email-khsieh@codeaurora.org> (raw) Currently at dp_pm_resume() is_connected state is decided base on hpd connection status only. This will put is_connected in wrongly "true" state at the scenario that dongle attached to DUT but without hmdi cable connecting to it. Fix this problem by adding read sink count from dongle and decided is_connected state base on both sink count and hpd connection status. Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org> --- drivers/gpu/drm/msm/dp/dp_display.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 2b660e9..9bcb261 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1308,6 +1308,17 @@ static int dp_display_remove(struct platform_device *pdev) return 0; } +static int dp_get_sink_count(struct dp_display_private *dp) +{ + u8 sink_count; + + sink_count = drm_dp_read_sink_count(dp->aux); + if (sink_count < 0) + return 0; + + return sink_count; +} + static int dp_pm_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -1327,14 +1338,22 @@ static int dp_pm_resume(struct device *dev) dp_catalog_ctrl_hpd_config(dp->catalog); - status = dp_catalog_link_is_connected(dp->catalog); + /* + * set sink to normal operation mode -- D0 + * before dpcd read + */ + dp_link_psm_config(dp->link, &dp->panel->link_info, false); + if ((status = dp_catalog_link_is_connected(dp->catalog))) + dp->link->sink_count = dp_get_sink_count(dp); + else + dp->link->sink_count = 0; /* * can not declared display is connected unless * HDMI cable is plugged in and sink_count of * dongle become 1 */ - if (status && dp->link->sink_count) + if (dp->link->sink_count) dp->dp_display.is_connected = true; else dp->dp_display.is_connected = false; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
WARNING: multiple messages have this Message-ID (diff)
From: Kuogee Hsieh <khsieh@codeaurora.org> To: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org, vkoul@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, khsieh@codeaurora.org, abhinavk@codeaurora.org, aravindh@codeaurora.org, freedreno@lists.freedesktop.org Subject: [PATCH] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Date: Wed, 28 Jul 2021 14:30:54 -0700 [thread overview] Message-ID: <1627507854-16733-1-git-send-email-khsieh@codeaurora.org> (raw) Currently at dp_pm_resume() is_connected state is decided base on hpd connection status only. This will put is_connected in wrongly "true" state at the scenario that dongle attached to DUT but without hmdi cable connecting to it. Fix this problem by adding read sink count from dongle and decided is_connected state base on both sink count and hpd connection status. Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org> --- drivers/gpu/drm/msm/dp/dp_display.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 2b660e9..9bcb261 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1308,6 +1308,17 @@ static int dp_display_remove(struct platform_device *pdev) return 0; } +static int dp_get_sink_count(struct dp_display_private *dp) +{ + u8 sink_count; + + sink_count = drm_dp_read_sink_count(dp->aux); + if (sink_count < 0) + return 0; + + return sink_count; +} + static int dp_pm_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -1327,14 +1338,22 @@ static int dp_pm_resume(struct device *dev) dp_catalog_ctrl_hpd_config(dp->catalog); - status = dp_catalog_link_is_connected(dp->catalog); + /* + * set sink to normal operation mode -- D0 + * before dpcd read + */ + dp_link_psm_config(dp->link, &dp->panel->link_info, false); + if ((status = dp_catalog_link_is_connected(dp->catalog))) + dp->link->sink_count = dp_get_sink_count(dp); + else + dp->link->sink_count = 0; /* * can not declared display is connected unless * HDMI cable is plugged in and sink_count of * dongle become 1 */ - if (status && dp->link->sink_count) + if (dp->link->sink_count) dp->dp_display.is_connected = true; else dp->dp_display.is_connected = false; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
next reply other threads:[~2021-07-28 21:31 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-28 21:30 Kuogee Hsieh [this message] 2021-07-28 21:30 ` [PATCH] drm/msm/dp: update is_connected status base on sink count at dp_pm_resume() Kuogee Hsieh 2021-07-30 18:57 ` Stephen Boyd 2021-08-02 16:10 ` khsieh
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=1627507854-16733-1-git-send-email-khsieh@codeaurora.org \ --to=khsieh@codeaurora.org \ --cc=abhinavk@codeaurora.org \ --cc=agross@kernel.org \ --cc=aravindh@codeaurora.org \ --cc=bjorn.andersson@linaro.org \ --cc=dri-devel@lists.freedesktop.org \ --cc=freedreno@lists.freedesktop.org \ --cc=linux-arm-msm@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=robdclark@gmail.com \ --cc=sean@poorly.run \ --cc=swboyd@chromium.org \ --cc=vkoul@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.