Commit 0f6090f3 authored by Abhinav Kumar's avatar Abhinav Kumar Committed by Rob Clark
Browse files

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: default avatarAbhinav Kumar <abhinavk@codeaurora.org>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/1618606645-19695-5-git-send-email-abhinavk@codeaurora.org


Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 9d30a4bc

drivers/gpu/drm/msm/dp/dp_catalog.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

drivers/gpu/drm/msm/dp/dp_catalog.h

+4 −0
Original line number Diff line number Diff line
@@ -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);

drivers/gpu/drm/msm/dp/dp_display.c

+29 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/gpu/drm/msm/msm_drv.h

+1 −0
Original line number Diff line number Diff line
@@ -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);