The debugfs code is provided an array of a single drm_connector. Then to access the connector, the list of all connectors of the DRM device is traversed and all non-DisplayPort connectors are skipped, to find the one and only DisplayPort connector.
But as we move to support multiple DisplayPort controllers this will now find multiple connectors and has no way to distinguish them.
Pass the single connector to dp_debug_get() and use this in the debugfs functions instead, both to simplify the code and the support the multiple instances.
Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org --- drivers/gpu/drm/msm/dp/dp_debug.c | 131 ++++++++++------------------ drivers/gpu/drm/msm/dp/dp_debug.h | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 2 +- 3 files changed, 46 insertions(+), 89 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index af709d93bb9f..da4323556ef3 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -24,7 +24,7 @@ struct dp_debug_private { struct dp_usbpd *usbpd; struct dp_link *link; struct dp_panel *panel; - struct drm_connector **connector; + struct drm_connector *connector; struct device *dev; struct drm_device *drm_dev;
@@ -97,59 +97,35 @@ DEFINE_SHOW_ATTRIBUTE(dp_debug);
static int dp_test_data_show(struct seq_file *m, void *data) { - struct drm_device *dev; - struct dp_debug_private *debug; - struct drm_connector *connector; - struct drm_connector_list_iter conn_iter; + const struct dp_debug_private *debug = m->private; + const struct drm_connector *connector = debug->connector; u32 bpc;
- debug = m->private; - dev = debug->drm_dev; - drm_connector_list_iter_begin(dev, &conn_iter); - drm_for_each_connector_iter(connector, &conn_iter) { - - if (connector->connector_type != - DRM_MODE_CONNECTOR_DisplayPort) - continue; - - if (connector->status == connector_status_connected) { - bpc = debug->link->test_video.test_bit_depth; - seq_printf(m, "hdisplay: %d\n", - debug->link->test_video.test_h_width); - seq_printf(m, "vdisplay: %d\n", - debug->link->test_video.test_v_height); - seq_printf(m, "bpc: %u\n", - dp_link_bit_depth_to_bpc(bpc)); - } else - seq_puts(m, "0"); + if (connector->status == connector_status_connected) { + bpc = debug->link->test_video.test_bit_depth; + seq_printf(m, "hdisplay: %d\n", + debug->link->test_video.test_h_width); + seq_printf(m, "vdisplay: %d\n", + debug->link->test_video.test_v_height); + seq_printf(m, "bpc: %u\n", + dp_link_bit_depth_to_bpc(bpc)); + } else { + seq_puts(m, "0"); }
- drm_connector_list_iter_end(&conn_iter); - return 0; } DEFINE_SHOW_ATTRIBUTE(dp_test_data);
static int dp_test_type_show(struct seq_file *m, void *data) { - struct dp_debug_private *debug = m->private; - struct drm_device *dev = debug->drm_dev; - struct drm_connector *connector; - struct drm_connector_list_iter conn_iter; - - drm_connector_list_iter_begin(dev, &conn_iter); - drm_for_each_connector_iter(connector, &conn_iter) { - - if (connector->connector_type != - DRM_MODE_CONNECTOR_DisplayPort) - continue; + const struct dp_debug_private *debug = m->private; + const struct drm_connector *connector = debug->connector;
- if (connector->status == connector_status_connected) - seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN); - else - seq_puts(m, "0"); - } - drm_connector_list_iter_end(&conn_iter); + if (connector->status == connector_status_connected) + seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN); + else + seq_puts(m, "0");
return 0; } @@ -161,14 +137,12 @@ static ssize_t dp_test_active_write(struct file *file, { char *input_buffer; int status = 0; - struct dp_debug_private *debug; - struct drm_device *dev; - struct drm_connector *connector; - struct drm_connector_list_iter conn_iter; + const struct dp_debug_private *debug; + const struct drm_connector *connector; int val = 0;
debug = ((struct seq_file *)file->private_data)->private; - dev = debug->drm_dev; + connector = debug->connector;
if (len == 0) return 0; @@ -179,30 +153,22 @@ static ssize_t dp_test_active_write(struct file *file,
DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
- drm_connector_list_iter_begin(dev, &conn_iter); - drm_for_each_connector_iter(connector, &conn_iter) { - if (connector->connector_type != - DRM_MODE_CONNECTOR_DisplayPort) - continue; - - if (connector->status == connector_status_connected) { - status = kstrtoint(input_buffer, 10, &val); - if (status < 0) - break; - DRM_DEBUG_DRIVER("Got %d for test active\n", val); - /* To prevent erroneous activation of the compliance - * testing code, only accept an actual value of 1 here - */ - if (val == 1) - debug->panel->video_test = true; - else - debug->panel->video_test = false; + if (connector->status == connector_status_connected) { + status = kstrtoint(input_buffer, 10, &val); + if (status < 0) { + kfree(input_buffer); + return status; } + DRM_DEBUG_DRIVER("Got %d for test active\n", val); + /* To prevent erroneous activation of the compliance + * testing code, only accept an actual value of 1 here + */ + if (val == 1) + debug->panel->video_test = true; + else + debug->panel->video_test = false; } - drm_connector_list_iter_end(&conn_iter); kfree(input_buffer); - if (status < 0) - return status;
*offp += len; return len; @@ -211,25 +177,16 @@ static ssize_t dp_test_active_write(struct file *file, static int dp_test_active_show(struct seq_file *m, void *data) { struct dp_debug_private *debug = m->private; - struct drm_device *dev = debug->drm_dev; - struct drm_connector *connector; - struct drm_connector_list_iter conn_iter; - - drm_connector_list_iter_begin(dev, &conn_iter); - drm_for_each_connector_iter(connector, &conn_iter) { - if (connector->connector_type != - DRM_MODE_CONNECTOR_DisplayPort) - continue; - - if (connector->status == connector_status_connected) { - if (debug->panel->video_test) - seq_puts(m, "1"); - else - seq_puts(m, "0"); - } else + struct drm_connector *connector = debug->connector; + + if (connector->status == connector_status_connected) { + if (debug->panel->video_test) + seq_puts(m, "1"); + else seq_puts(m, "0"); + } else { + seq_puts(m, "0"); } - drm_connector_list_iter_end(&conn_iter);
return 0; } @@ -278,7 +235,7 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector **connector, struct drm_minor *minor) + struct drm_connector *connector, struct drm_minor *minor) { int rc = 0; struct dp_debug_private *debug; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 7eaedfbb149c..3f90acfffc5a 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -43,7 +43,7 @@ struct dp_debug { */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link, - struct drm_connector **connector, + struct drm_connector *connector, struct drm_minor *minor);
/** diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 1708b7cdc1b3..41a6f58916e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1464,7 +1464,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev;
dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd, - dp->link, &dp->dp_display.connector, + dp->link, dp->dp_display.connector, minor); if (IS_ERR(dp->debug)) { rc = PTR_ERR(dp->debug);
Quoting Bjorn Andersson (2021-10-09 20:04:35)
The debugfs code is provided an array of a single drm_connector. Then to access the connector, the list of all connectors of the DRM device is traversed and all non-DisplayPort connectors are skipped, to find the one and only DisplayPort connector.
But as we move to support multiple DisplayPort controllers this will now find multiple connectors and has no way to distinguish them.
Pass the single connector to dp_debug_get() and use this in the debugfs functions instead, both to simplify the code and the support the
s/the support the/to support the/
multiple instances.
Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org
Reviewed-by: Stephen Boyd swboyd@chromium.org
On 2021-10-09 20:04, Bjorn Andersson wrote:
The debugfs code is provided an array of a single drm_connector. Then to access the connector, the list of all connectors of the DRM device is traversed and all non-DisplayPort connectors are skipped, to find the one and only DisplayPort connector.
But as we move to support multiple DisplayPort controllers this will now find multiple connectors and has no way to distinguish them.
Pass the single connector to dp_debug_get() and use this in the debugfs functions instead, both to simplify the code and the support the multiple instances.
Change itself is fine, hence Reviewed-by: Abhinav Kumar abhinavk@codeaurora.org
What has to be checked now is now to create multiple DP nodes for multi-DP cases. Today, the debug node will be created only once :
https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/d...
This also needs to be expanded for multi-DP to make the solution complete.
Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org
drivers/gpu/drm/msm/dp/dp_debug.c | 131 ++++++++++------------------ drivers/gpu/drm/msm/dp/dp_debug.h | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 2 +- 3 files changed, 46 insertions(+), 89 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index af709d93bb9f..da4323556ef3 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -24,7 +24,7 @@ struct dp_debug_private { struct dp_usbpd *usbpd; struct dp_link *link; struct dp_panel *panel;
- struct drm_connector **connector;
- struct drm_connector *connector; struct device *dev; struct drm_device *drm_dev;
@@ -97,59 +97,35 @@ DEFINE_SHOW_ATTRIBUTE(dp_debug);
static int dp_test_data_show(struct seq_file *m, void *data) {
- struct drm_device *dev;
- struct dp_debug_private *debug;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector; u32 bpc;
- debug = m->private;
- dev = debug->drm_dev;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));} elseseq_puts(m, "0");
- if (connector->status == connector_status_connected) {
bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));- } else {
seq_puts(m, "0");
- drm_connector_list_iter_end(&conn_iter);
- return 0;
} DEFINE_SHOW_ATTRIBUTE(dp_test_data);
static int dp_test_type_show(struct seq_file *m, void *data) {
- struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector;
if (connector->status == connector_status_connected)seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);elseseq_puts(m, "0");- }
- drm_connector_list_iter_end(&conn_iter);
if (connector->status == connector_status_connected)
seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);else
seq_puts(m, "0");return 0;
} @@ -161,14 +137,12 @@ static ssize_t dp_test_active_write(struct file *file, { char *input_buffer; int status = 0;
- struct dp_debug_private *debug;
- struct drm_device *dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
const struct dp_debug_private *debug;
const struct drm_connector *connector; int val = 0;
debug = ((struct seq_file *)file->private_data)->private;
- dev = debug->drm_dev;
connector = debug->connector;
if (len == 0) return 0;
@@ -179,30 +153,22 @@ static ssize_t dp_test_active_write(struct file *file,
DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {status = kstrtoint(input_buffer, 10, &val);if (status < 0)break;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
- if (connector->status == connector_status_connected) {
status = kstrtoint(input_buffer, 10, &val);if (status < 0) {kfree(input_buffer);return status;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
drm_connector_list_iter_end(&conn_iter); kfree(input_buffer);
if (status < 0)
return status;*offp += len; return len;
@@ -211,25 +177,16 @@ static ssize_t dp_test_active_write(struct file *file, static int dp_test_active_show(struct seq_file *m, void *data) { struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {if (debug->panel->video_test)seq_puts(m, "1");elseseq_puts(m, "0");} else
- struct drm_connector *connector = debug->connector;
- if (connector->status == connector_status_connected) {
if (debug->panel->video_test)seq_puts(m, "1");else seq_puts(m, "0");- } else {
seq_puts(m, "0");
drm_connector_list_iter_end(&conn_iter);
return 0;
} @@ -278,7 +235,7 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector, struct drm_minor *minor)
struct drm_connector *connector, struct drm_minor *minor){ int rc = 0; struct dp_debug_private *debug; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 7eaedfbb149c..3f90acfffc5a 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -43,7 +43,7 @@ struct dp_debug { */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector,
struct drm_connector *connector,/** diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 1708b7cdc1b3..41a6f58916e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1464,7 +1464,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev;
dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
dp->link, &dp->dp_display.connector,
dp->link, dp->dp_display.connector, minor);
On Tue 12 Oct 16:03 PDT 2021, abhinavk@codeaurora.org wrote:
On 2021-10-09 20:04, Bjorn Andersson wrote:
The debugfs code is provided an array of a single drm_connector. Then to access the connector, the list of all connectors of the DRM device is traversed and all non-DisplayPort connectors are skipped, to find the one and only DisplayPort connector.
But as we move to support multiple DisplayPort controllers this will now find multiple connectors and has no way to distinguish them.
Pass the single connector to dp_debug_get() and use this in the debugfs functions instead, both to simplify the code and the support the multiple instances.
Change itself is fine, hence Reviewed-by: Abhinav Kumar abhinavk@codeaurora.org
Thanks.
What has to be checked now is now to create multiple DP nodes for multi-DP cases. Today, the debug node will be created only once :
https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/d...
This also needs to be expanded for multi-DP to make the solution complete.
In my multi-DP support patch I end up invoking msm_dp_debugfs_init() for each of the DP/eDP instances and in its current form the first one gets registered and any others will fail because of the resulting name collision.
This patch came as a byproduct of the effort of addressing that problem.
Regards, Bjorn
Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org
drivers/gpu/drm/msm/dp/dp_debug.c | 131 ++++++++++------------------ drivers/gpu/drm/msm/dp/dp_debug.h | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 2 +- 3 files changed, 46 insertions(+), 89 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index af709d93bb9f..da4323556ef3 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -24,7 +24,7 @@ struct dp_debug_private { struct dp_usbpd *usbpd; struct dp_link *link; struct dp_panel *panel;
- struct drm_connector **connector;
- struct drm_connector *connector; struct device *dev; struct drm_device *drm_dev;
@@ -97,59 +97,35 @@ DEFINE_SHOW_ATTRIBUTE(dp_debug);
static int dp_test_data_show(struct seq_file *m, void *data) {
- struct drm_device *dev;
- struct dp_debug_private *debug;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector; u32 bpc;
- debug = m->private;
- dev = debug->drm_dev;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));} elseseq_puts(m, "0");
- if (connector->status == connector_status_connected) {
bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));- } else {
seq_puts(m, "0");
- drm_connector_list_iter_end(&conn_iter);
- return 0;
} DEFINE_SHOW_ATTRIBUTE(dp_test_data);
static int dp_test_type_show(struct seq_file *m, void *data) {
- struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector;
if (connector->status == connector_status_connected)seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);elseseq_puts(m, "0");- }
- drm_connector_list_iter_end(&conn_iter);
if (connector->status == connector_status_connected)
seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);else
seq_puts(m, "0");return 0;
} @@ -161,14 +137,12 @@ static ssize_t dp_test_active_write(struct file *file, { char *input_buffer; int status = 0;
- struct dp_debug_private *debug;
- struct drm_device *dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
const struct dp_debug_private *debug;
const struct drm_connector *connector; int val = 0;
debug = ((struct seq_file *)file->private_data)->private;
- dev = debug->drm_dev;
connector = debug->connector;
if (len == 0) return 0;
@@ -179,30 +153,22 @@ static ssize_t dp_test_active_write(struct file *file,
DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {status = kstrtoint(input_buffer, 10, &val);if (status < 0)break;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
- if (connector->status == connector_status_connected) {
status = kstrtoint(input_buffer, 10, &val);if (status < 0) {kfree(input_buffer);return status;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
drm_connector_list_iter_end(&conn_iter); kfree(input_buffer);
if (status < 0)
return status;*offp += len; return len;
@@ -211,25 +177,16 @@ static ssize_t dp_test_active_write(struct file *file, static int dp_test_active_show(struct seq_file *m, void *data) { struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {if (debug->panel->video_test)seq_puts(m, "1");elseseq_puts(m, "0");} else
- struct drm_connector *connector = debug->connector;
- if (connector->status == connector_status_connected) {
if (debug->panel->video_test)seq_puts(m, "1");else seq_puts(m, "0");- } else {
seq_puts(m, "0");
drm_connector_list_iter_end(&conn_iter);
return 0;
} @@ -278,7 +235,7 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector, struct drm_minor *minor)
struct drm_connector *connector, struct drm_minor *minor){ int rc = 0; struct dp_debug_private *debug; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 7eaedfbb149c..3f90acfffc5a 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -43,7 +43,7 @@ struct dp_debug { */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector,
struct drm_connector *connector,/** diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 1708b7cdc1b3..41a6f58916e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1464,7 +1464,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev;
dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
dp->link, &dp->dp_display.connector,
dp->link, dp->dp_display.connector, minor);
On 2021-10-12 16:38, Bjorn Andersson wrote:
On Tue 12 Oct 16:03 PDT 2021, abhinavk@codeaurora.org wrote:
On 2021-10-09 20:04, Bjorn Andersson wrote:
The debugfs code is provided an array of a single drm_connector. Then to access the connector, the list of all connectors of the DRM device is traversed and all non-DisplayPort connectors are skipped, to find the one and only DisplayPort connector.
But as we move to support multiple DisplayPort controllers this will now find multiple connectors and has no way to distinguish them.
Pass the single connector to dp_debug_get() and use this in the debugfs functions instead, both to simplify the code and the support the multiple instances.
Change itself is fine, hence Reviewed-by: Abhinav Kumar abhinavk@codeaurora.org
Thanks.
What has to be checked now is now to create multiple DP nodes for multi-DP cases. Today, the debug node will be created only once :
https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/d...
This also needs to be expanded for multi-DP to make the solution complete.
In my multi-DP support patch I end up invoking msm_dp_debugfs_init() for each of the DP/eDP instances and in its current form the first one gets registered and any others will fail because of the resulting name collision.
This patch came as a byproduct of the effort of addressing that problem.
Regards, Bjorn
Ah, okay. Yes i see the part you are referring to in https://patchwork.freedesktop.org/patch/457667/:
@@ -203,8 +204,10 @@ static int dpu_kms_debugfs_init(struct msm_kms *kms, struct drm_minor *minor) dpu_debugfs_vbif_init(dpu_kms, entry); dpu_debugfs_core_irq_init(dpu_kms, entry);
- if (priv->dp) - msm_dp_debugfs_init(priv->dp, minor); + for (i = 0; i < ARRAY_SIZE(priv->dp); i++) { + if (priv->dp[i]) + msm_dp_debugfs_init(priv->dp[i], minor); + }
That clarifies it. Thanks.
Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org
drivers/gpu/drm/msm/dp/dp_debug.c | 131 ++++++++++------------------ drivers/gpu/drm/msm/dp/dp_debug.h | 2 +- drivers/gpu/drm/msm/dp/dp_display.c | 2 +- 3 files changed, 46 insertions(+), 89 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c index af709d93bb9f..da4323556ef3 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.c +++ b/drivers/gpu/drm/msm/dp/dp_debug.c @@ -24,7 +24,7 @@ struct dp_debug_private { struct dp_usbpd *usbpd; struct dp_link *link; struct dp_panel *panel;
- struct drm_connector **connector;
- struct drm_connector *connector; struct device *dev; struct drm_device *drm_dev;
@@ -97,59 +97,35 @@ DEFINE_SHOW_ATTRIBUTE(dp_debug);
static int dp_test_data_show(struct seq_file *m, void *data) {
- struct drm_device *dev;
- struct dp_debug_private *debug;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector; u32 bpc;
- debug = m->private;
- dev = debug->drm_dev;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));} elseseq_puts(m, "0");
- if (connector->status == connector_status_connected) {
bpc = debug->link->test_video.test_bit_depth;seq_printf(m, "hdisplay: %d\n",debug->link->test_video.test_h_width);seq_printf(m, "vdisplay: %d\n",debug->link->test_video.test_v_height);seq_printf(m, "bpc: %u\n",dp_link_bit_depth_to_bpc(bpc));- } else {
seq_puts(m, "0");
- drm_connector_list_iter_end(&conn_iter);
- return 0;
} DEFINE_SHOW_ATTRIBUTE(dp_test_data);
static int dp_test_type_show(struct seq_file *m, void *data) {
- struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;
- const struct dp_debug_private *debug = m->private;
- const struct drm_connector *connector = debug->connector;
if (connector->status == connector_status_connected)seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);elseseq_puts(m, "0");- }
- drm_connector_list_iter_end(&conn_iter);
if (connector->status == connector_status_connected)
seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);else
seq_puts(m, "0");return 0;
} @@ -161,14 +137,12 @@ static ssize_t dp_test_active_write(struct file *file, { char *input_buffer; int status = 0;
- struct dp_debug_private *debug;
- struct drm_device *dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
const struct dp_debug_private *debug;
const struct drm_connector *connector; int val = 0;
debug = ((struct seq_file *)file->private_data)->private;
- dev = debug->drm_dev;
connector = debug->connector;
if (len == 0) return 0;
@@ -179,30 +153,22 @@ static ssize_t dp_test_active_write(struct file *file,
DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {status = kstrtoint(input_buffer, 10, &val);if (status < 0)break;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
- if (connector->status == connector_status_connected) {
status = kstrtoint(input_buffer, 10, &val);if (status < 0) {kfree(input_buffer);return status;DRM_DEBUG_DRIVER("Got %d for test active\n", val);/* To prevent erroneous activation of the compliance* testing code, only accept an actual value of 1 here*/if (val == 1)debug->panel->video_test = true;elsedebug->panel->video_test = false;
drm_connector_list_iter_end(&conn_iter); kfree(input_buffer);
if (status < 0)
return status;*offp += len; return len;
@@ -211,25 +177,16 @@ static ssize_t dp_test_active_write(struct file *file, static int dp_test_active_show(struct seq_file *m, void *data) { struct dp_debug_private *debug = m->private;
- struct drm_device *dev = debug->drm_dev;
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
- drm_connector_list_iter_begin(dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->connector_type !=DRM_MODE_CONNECTOR_DisplayPort)continue;if (connector->status == connector_status_connected) {if (debug->panel->video_test)seq_puts(m, "1");elseseq_puts(m, "0");} else
- struct drm_connector *connector = debug->connector;
- if (connector->status == connector_status_connected) {
if (debug->panel->video_test)seq_puts(m, "1");else seq_puts(m, "0");- } else {
seq_puts(m, "0");
drm_connector_list_iter_end(&conn_iter);
return 0;
} @@ -278,7 +235,7 @@ static int dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector, struct drm_minor *minor)
struct drm_connector *connector, struct drm_minor *minor){ int rc = 0; struct dp_debug_private *debug; diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h index 7eaedfbb149c..3f90acfffc5a 100644 --- a/drivers/gpu/drm/msm/dp/dp_debug.h +++ b/drivers/gpu/drm/msm/dp/dp_debug.h @@ -43,7 +43,7 @@ struct dp_debug { */ struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel, struct dp_usbpd *usbpd, struct dp_link *link,
struct drm_connector **connector,
struct drm_connector *connector,/** diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 1708b7cdc1b3..41a6f58916e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1464,7 +1464,7 @@ void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) dev = &dp->pdev->dev;
dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
dp->link, &dp->dp_display.connector,
dp->link, dp->dp_display.connector, minor);
Hi Bjorn,
I love your patch! Yet something to improve:
[auto build test ERROR on linus/master] [also build test ERROR on v5.15-rc5 next-20211013] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Bjorn-Andersson/drm-msm-dp-Use-the-... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7fd2bf83d59a2d32e0d596c5d3e623b9a0e7e2d5 config: arm-qcom_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/e591869849ae9c71d7db25e6b0df588a31ca... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Bjorn-Andersson/drm-msm-dp-Use-the-connector-passed-to-dp_debug_get/20211010-110400 git checkout e591869849ae9c71d7db25e6b0df588a31ca76cf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot lkp@intel.com
All errors (new ones prefixed by >>):
drivers/gpu/drm/msm/dp/dp_display.c: In function 'msm_dp_debugfs_init':
drivers/gpu/drm/msm/dp/dp_display.c:1432:65: error: passing argument 5 of 'dp_debug_get' from incompatible pointer type [-Werror=incompatible-pointer-types]
1432 | dp->link, dp->dp_display.connector, | ~~~~~~~~~~~~~~^~~~~~~~~~ | | | struct drm_connector * In file included from drivers/gpu/drm/msm/dp/dp_display.c:28: drivers/gpu/drm/msm/dp/dp_debug.h:63:40: note: expected 'struct drm_connector **' but argument is of type 'struct drm_connector *' 63 | struct drm_connector **connector, struct drm_minor *minor) | ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ cc1: some warnings being treated as errors
vim +/dp_debug_get +1432 drivers/gpu/drm/msm/dp/dp_display.c
1421 1422 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor) 1423 { 1424 struct dp_display_private *dp; 1425 struct device *dev; 1426 int rc; 1427 1428 dp = container_of(dp_display, struct dp_display_private, dp_display); 1429 dev = &dp->pdev->dev; 1430 1431 dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
1432 dp->link, dp->dp_display.connector,
1433 minor); 1434 if (IS_ERR(dp->debug)) { 1435 rc = PTR_ERR(dp->debug); 1436 DRM_ERROR("failed to initialize debug, rc = %d\n", rc); 1437 dp->debug = NULL; 1438 } 1439 } 1440
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
dri-devel@lists.freedesktop.org
-
abhinavk＠codeaurora.org -
Bjorn Andersson -
kernel test robot -
Stephen Boyd