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| author | Abhinav Kumar <abhinavk@codeaurora.org> | 2021-04-16 13:57:22 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2021-06-23 07:32:13 -0700 |
| commit | 0f6090f37f801871b292c296ed34eb2b089a0477 (patch) | |
| tree | 516b8ce6d41ab8c462e7a0be521cc1ee0244d8c5 | |
| parent | 9d30a4bcf43c255498a537169c9bf279e6ec55de (diff) | |
| download | linux-0f6090f37f801871b292c296ed34eb2b089a0477.tar.gz linux-0f6090f37f801871b292c296ed34eb2b089a0477.tar.bz2 linux-0f6090f37f801871b292c296ed34eb2b089a0477.zip | |
drm/msm/dp: add API to take DP register snapshot
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>
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_catalog.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_catalog.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 29 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/msm_drv.h | 1 |
4 files changed, 43 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index f4f53f23e331..854c41d05b19 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 176a9020a520..e7e8b13d1753 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 cdec0a367a2c..13447f72d5c4 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -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) { diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index ac206c1252ce..9c40bac8a050 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); |