Add an API to take a snapshot of DP controller registers. This API
will be used by the msm_disp_snapshot module to capture the DP
snapshot.
Signed-off-by: Abhinav Kumar <abhinavk@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_catalog.c | 9 +++++++++
drivers/gpu/drm/msm/dp/dp_catalog.h | 4 ++++
drivers/gpu/drm/msm/dp/dp_display.c | 29 +++++++++++++++++++++++++++++
drivers/gpu/drm/msm/msm_drv.h | 1 +
4 files changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index b1a9b1b..99f4fd8 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -62,6 +62,15 @@ struct dp_catalog_private {
u8 aux_lut_cfg_index[PHY_AUX_CFG_MAX];
};
+void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *disp_state)
+{
+ struct dp_catalog_private *catalog = container_of(dp_catalog,
+ struct dp_catalog_private, dp_catalog);
+
+ msm_disp_snapshot_add_block(disp_state, catalog->io->dp_controller.len,
+ catalog->io->dp_controller.base, "dp_ctrl");
+}
+
static inline u32 dp_read_aux(struct dp_catalog_private *catalog, u32 offset)
{
offset += MSM_DP_CONTROLLER_AUX_OFFSET;
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 176a902..e7e8b13 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -9,6 +9,7 @@
#include <drm/drm_modes.h>
#include "dp_parser.h"
+#include "disp/msm_disp_snapshot.h"
/* interrupts */
#define DP_INTR_HPD BIT(0)
@@ -71,6 +72,9 @@ struct dp_catalog {
u32 audio_data;
};
+/* Debug module */
+void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *disp_state);
+
/* AUX APIs */
u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog);
int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 5a39da6..6670558 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1009,6 +1009,35 @@ int dp_display_get_test_bpp(struct msm_dp *dp)
dp_display->link->test_video.test_bit_depth);
}
+void msm_dp_snapshot(struct msm_dp *dp)
+{
+ struct dp_display_private *dp_display;
+ struct drm_device *drm;
+ struct msm_disp_state *disp_state;
+
+ dp_display = container_of(dp, struct dp_display_private, dp_display);
+ drm = dp->drm_dev;
+ disp_state = msm_disp_state_get(drm);
+
+ /*
+ * if we are reading registers we need the link clocks to be on
+ * however till DP cable is connected this will not happen as we
+ * do not know the resolution to power up with. Hence check the
+ * power_on status before dumping DP registers to avoid crash due
+ * to unclocked access
+ */
+ mutex_lock(&dp_display->event_mutex);
+
+ if (!dp->power_on) {
+ mutex_unlock(&dp_display->event_mutex);
+ return;
+ }
+
+ dp_catalog_snapshot(dp_display->catalog, disp_state);
+
+ mutex_unlock(&dp_display->event_mutex);
+}
+
static void dp_display_config_hpd(struct dp_display_private *dp)
{
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index ac206c1..9c40bac 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -367,6 +367,7 @@ void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
void msm_dp_irq_postinstall(struct msm_dp *dp_display);
+void msm_dp_snapshot(struct msm_dp *dp_display);
void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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