[igt-dev] [PATCH 3/4] lib/igt_amd: add helpers to check PSR state
David Zhang
dingchen.zhang at amd.com
Thu Mar 10 22:30:45 UTC 2022
[why]
For AMDGPU devices, we'd check the PSR state via reading from the
debugfs interface for a given eDP connector, where the debugfs
interface path locates at
<debugfs_root>/dri/0/eDP-X/psr_state
where 'X' is the eDP connector index.
[how]
define and add the helper to check if PSR state debugfs interface
is supported in driver, and the helper to read PSR state from the
debugfs interface.
In addition, the helper to check debugfs supported is generic and
can be used to replacing the existed redundant codes.
Cc: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Leo Li <sunpeng.li at amd.com>
Cc: Jay Pillai <aurabindo.pillai at amd.com>
Cc: Wayne Lin <wayne.lin at amd.com>
Signed-off-by: David Zhang <dingchen.zhang at amd.com>
---
lib/igt_amd.c | 142 +++++++++++++++++------------------------
lib/igt_amd.h | 3 +
tests/amdgpu/amd_psr.c | 13 +---
3 files changed, 65 insertions(+), 93 deletions(-)
diff --git a/lib/igt_amd.c b/lib/igt_amd.c
index 7f52803b..0a039002 100644
--- a/lib/igt_amd.c
+++ b/lib/igt_amd.c
@@ -251,11 +251,15 @@ bool igt_amd_is_tiled(uint64_t modifier)
}
/**
- * igt_amd_output_has_dsc: check if connector has dsc debugfs entry
- * @drm_fd: DRM file descriptor
- * @connector_name: The connector's name, on which we're reading the status
+ * @brief generic helper to check if the debugfs entry of given connector has the
+ * debugfs interface defined.
+ * @param drm_fd: DRM file descriptor
+ * @param connector_name: The connector's name, on which we're reading the status
+ * @param interface_name: The debugfs interface name to check
+ * @return true if <debugfs_root>/connector_name/interface_name exists and defined
+ * @return false otherwise
*/
-static bool igt_amd_output_has_dsc(int drm_fd, char *connector_name)
+static bool igt_amd_output_has_debugfs(int drm_fd, char *connector_name, const char *interface_name)
{
int fd;
int res;
@@ -267,9 +271,9 @@ static bool igt_amd_output_has_dsc(int drm_fd, char *connector_name)
return false;
}
- res = fstatat(fd, DEBUGFS_DSC_CLOCK_EN , &stat, 0);
+ res = fstatat(fd, interface_name, &stat, 0);
if (res != 0) {
- igt_info("%s debugfs not supported\n", DEBUGFS_DSC_CLOCK_EN);
+ igt_info("output %s: %s debugfs not supported\n", connector_name, interface_name);
close(fd);
return false;
}
@@ -278,6 +282,16 @@ static bool igt_amd_output_has_dsc(int drm_fd, char *connector_name)
return true;
}
+/**
+ * igt_amd_output_has_dsc: check if connector has dsc debugfs entry
+ * @drm_fd: DRM file descriptor
+ * @connector_name: The connector's name, on which we're reading the status
+ */
+static bool igt_amd_output_has_dsc(int drm_fd, char *connector_name)
+{
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_DSC_CLOCK_EN);
+}
+
/**
* is_dp_dsc_supported: Checks if connector is DSC capable
* @display: A pointer to an #igt_display_t structure
@@ -707,25 +721,7 @@ int igt_amd_read_dsc_param_slice_bpg(int drm_fd, char *connector_name)
*/
static bool igt_amd_output_has_hpd(int drm_fd, char *connector_name)
{
- int fd;
- int res;
- struct stat stat;
-
- fd = igt_debugfs_connector_dir(drm_fd, connector_name, O_RDONLY);
- if (fd < 0) {
- igt_info("output %s: debugfs not found\n", connector_name);
- return false;
- }
-
- res = fstatat(fd, DEBUGFS_HPD_TRIGGER, &stat, 0);
- if (res != 0) {
- igt_info("%s debugfs not supported\n", DEBUGFS_HPD_TRIGGER);
- close(fd);
- return false;
- }
-
- close(fd);
- return true;
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_HPD_TRIGGER);
}
/**
@@ -872,25 +868,7 @@ void igt_amd_write_link_settings(
*/
bool igt_amd_output_has_link_settings(int drm_fd, char *connector_name)
{
- int fd;
- int res;
- struct stat stat;
-
- fd = igt_debugfs_connector_dir(drm_fd, connector_name, O_RDONLY);
- if (fd < 0) {
- igt_info("output %s: debugfs not found\n", connector_name);
- return false;
- }
-
- res = fstatat(fd, DEBUGFS_DP_LINK_SETTINGS, &stat, 0);
- if (res != 0) {
- igt_info("output %s: %s debugfs not supported\n", connector_name, DEBUGFS_DP_LINK_SETTINGS);
- close(fd);
- return false;
- }
-
- close(fd);
- return true;
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_DP_LINK_SETTINGS);;
}
/*
@@ -984,25 +962,7 @@ void igt_amd_write_ilr_setting(
*/
bool igt_amd_output_has_ilr_setting(int drm_fd, char *connector_name)
{
- int fd;
- int res;
- struct stat stat;
-
- fd = igt_debugfs_connector_dir(drm_fd, connector_name, O_RDONLY);
- if (fd < 0) {
- igt_info("output %s: debugfs not found\n", connector_name);
- return false;
- }
-
- res = fstatat(fd, DEBUGFS_EDP_ILR_SETTING, &stat, 0);
- if (res != 0) {
- igt_info("output %s: %s debugfs not supported\n", connector_name, DEBUGFS_EDP_ILR_SETTING);
- close(fd);
- return false;
- }
-
- close(fd);
- return true;
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_EDP_ILR_SETTING);;
}
/**
@@ -1012,25 +972,7 @@ bool igt_amd_output_has_ilr_setting(int drm_fd, char *connector_name)
*/
bool igt_amd_output_has_psr_cap(int drm_fd, char *connector_name)
{
- int fd;
- int res;
- struct stat stat;
-
- fd = igt_debugfs_connector_dir(drm_fd, connector_name, O_RDONLY);
- if (fd < 0) {
- igt_info("output %s: debugfs not found\n", connector_name);
- return false;
- }
-
- res = fstatat(fd, DEBUGFS_EDP_PSR_CAP, &stat, 0);
- if (res != 0) {
- igt_info("output %s: %s debugfs not supported\n", connector_name, DEBUGFS_EDP_PSR_CAP);
- close(fd);
- return false;
- }
-
- close(fd);
- return true;
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_EDP_PSR_CAP);
}
/**
@@ -1097,3 +1039,39 @@ bool igt_amd_psr_support_drv(int drm_fd, char *connector_name, enum psr_mode mod
else
return strstr(buf, "Driver support: yes [0x01]");
}
+
+/**
+ * igt_amd_output_has_psr_state: check if eDP connector has psr_state debugfs entry
+ * @drm_fd: DRM file descriptor
+ * @connector_name: The connector's name, on which we're reading the status
+ */
+bool igt_amd_output_has_psr_state(int drm_fd, char *connector_name)
+{
+ return igt_amd_output_has_debugfs(drm_fd, connector_name, DEBUGFS_EDP_PSR_STATE);
+}
+
+/**
+ * @brief Read PSR State from debugfs interface
+ * @param drm_fd DRM file descriptor
+ * @param connector_name The connector's name, on which we're reading the status
+ * @return PSR state as integer
+ */
+int igt_amd_read_psr_state(int drm_fd, char *connector_name)
+{
+ char buf[4];
+ int fd, ret;
+
+ fd = igt_debugfs_connector_dir(drm_fd, connector_name, O_RDONLY);
+ if (fd < 0) {
+ igt_info("Couldn't open connector %s debugfs directory\n", connector_name);
+ return false;
+ }
+
+ ret = igt_debugfs_simple_read(fd, DEBUGFS_EDP_PSR_STATE, buf, sizeof(buf));
+ close(fd);
+
+ igt_assert_f(ret >= 0, "Reading %s for connector %s failed.\n",
+ DEBUGFS_EDP_PSR_STATE, connector_name);
+
+ return strtol(buf, NULL, 10);
+}
diff --git a/lib/igt_amd.h b/lib/igt_amd.h
index 6e465817..f87c1991 100644
--- a/lib/igt_amd.h
+++ b/lib/igt_amd.h
@@ -47,6 +47,7 @@
#define DEBUGFS_EDP_ILR_SETTING "ilr_setting"
#define MAX_SUPPORTED_ILR 8
#define DEBUGFS_EDP_PSR_CAP "psr_capability"
+#define DEBUGFS_EDP_PSR_STATE "psr_state"
enum amd_dsc_clock_force {
DSC_AUTOMATIC = 0,
@@ -143,5 +144,7 @@ bool igt_amd_output_has_ilr_setting(int drm_fd, char *connector_name);
bool igt_amd_output_has_psr_cap(int drm_fd, char *connector_name);
bool igt_amd_psr_support_sink(int drm_fd, char *connector_name, enum psr_mode mode);
bool igt_amd_psr_support_drv(int drm_fd, char *connector_name, enum psr_mode mode);
+bool igt_amd_output_has_psr_state(int drm_fd, char *connector_name);
+int igt_amd_read_psr_state(int drm_fd, char *connector_name);
#endif /* IGT_AMD_H */
diff --git a/tests/amdgpu/amd_psr.c b/tests/amdgpu/amd_psr.c
index 732eab25..88e824c3 100644
--- a/tests/amdgpu/amd_psr.c
+++ b/tests/amdgpu/amd_psr.c
@@ -24,6 +24,7 @@
#include "igt.h"
#include "igt_core.h"
#include "igt_kms.h"
+#include "igt_amd.h"
#include <stdint.h>
#include <fcntl.h>
#include <xf86drmMode.h>
@@ -34,7 +35,6 @@
*/
IGT_TEST_DESCRIPTION("Basic test for enabling Panel Self Refresh for eDP displays");
-#define DEBUGFS_PSR_STATE "psr_state"
/* After a full update, a few fast updates are necessary for PSR to be enabled */
#define N_FLIPS 6
/* DMCUB takes some time to actually enable PSR. Worst case delay is 4 seconds */
@@ -108,8 +108,6 @@ static int check_conn_type(data_t *data, uint32_t type) {
}
static void run_check_psr(data_t *data, bool test_null_crtc) {
- char buf[8];
- char *connector_name;
int fd, edp_idx, dp_idx, ret, i, psr_state;
igt_fb_t ref_fb, ref_fb2;
igt_fb_t *flip_fb;
@@ -157,14 +155,7 @@ static void run_check_psr(data_t *data, bool test_null_crtc) {
if (output->config.connector->connector_type != DRM_MODE_CONNECTOR_eDP)
continue;
- connector_name = output->name;
- fd = igt_debugfs_connector_dir(data->fd, connector_name, O_RDONLY);
- igt_assert(fd >= 0);
-
- ret = igt_debugfs_simple_read(fd, DEBUGFS_PSR_STATE, buf, sizeof(buf));
- igt_require(ret > 0);
-
- psr_state = (int) strtol(buf, NULL, 10);
+ psr_state = igt_amd_read_psr_state(data->fd, output->name);
igt_fail_on_f(psr_state < 1, "PSR was not enabled for connector %s\n", output->name);
igt_fail_on_f(psr_state == 0xff, "PSR is invalid for connector %s\n", output->name);
igt_fail_on_f(psr_state != 5, "PSR state is expected to be at 5 on a "
--
2.25.1
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