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drm/msm/dp: add API to take DP register snapshot

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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@codeaurora.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/1618606645-19695-5-git-send-email-abhinavk@codeaurora.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Abhinav Kumar
2021-04-16 13:57:22 -07:00
committed by Rob Clark
parent 9d30a4bcf4
commit 0f6090f37f
4 changed files with 43 additions and 0 deletions
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9
drivers/gpu/drm/msm/dp/dp_catalog.c
View File

@@ -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;

4
drivers/gpu/drm/msm/dp/dp_catalog.h
View File

@@ -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);

29
drivers/gpu/drm/msm/dp/dp_display.c
View File

@@ -1039,6 +1039,35 @@ 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)
{

1
drivers/gpu/drm/msm/msm_drv.h
View File

@@ -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);