disp: msm: expose qsync avr step as part of conn mode caps

Add capability to read avr step for each timing mode. This will
be in addition to the existing avr-step-list which is defined
when dfps is enabled. Expose the avr-step as part of each
mode in connector caps to user-mode.
Additionally, change the avr_step connector property to enum
to give usermode just the capability to enable/disable avr-step
and not alter the step value as its fixed from the device tree.

Change-Id: I6d7f8e9fcf03f98abef7640fc741e5e1be8597a1
Signed-off-by: Veera Sundaram Sankaran <quic_veeras@quicinc.com>

msm/dsi/dsi_drm.c

@@ -641,6 +641,7 @@ int dsi_conn_get_mode_info(struct drm_connector *connector,
 	mode_info->mdp_transfer_time_us_max = dsi_mode->priv_info->mdp_transfer_time_us_max;
 	mode_info->disable_rsc_solver = dsi_mode->priv_info->disable_rsc_solver;
 	mode_info->qsync_min_fps = dsi_mode->timing.qsync_min_fps;
+	mode_info->avr_step_fps = dsi_mode->timing.avr_step_fps;
 	mode_info->wd_jitter = dsi_mode->priv_info->wd_jitter;
 
 	mode_info->vpadding = dsi_display->panel->host_config.vpadding;
@@ -711,28 +712,6 @@ static const struct drm_bridge_funcs dsi_bridge_ops = {
 	.mode_set     = dsi_bridge_mode_set,
 };
 
-int dsi_conn_set_avr_step_info(struct dsi_panel *panel, void *info)
-{
-	u32 i;
-	int idx = 0;
-	size_t buff_sz = PAGE_SIZE;
-	char *buff;
-
-	buff = kzalloc(buff_sz, GFP_KERNEL);
-	if (!buff)
-		return -ENOMEM;
-
-	for (i = 0; i < panel->avr_caps.avr_step_fps_list_len && (idx < (buff_sz - 1)); i++)
-		idx += scnprintf(&buff[idx], buff_sz - idx, "%u@%u ",
-				 panel->avr_caps.avr_step_fps_list[i],
-				 panel->dfps_caps.dfps_list[i]);
-
-	sde_kms_info_add_keystr(info, "avr step requirement", buff);
-	kfree(buff);
-
-	return 0;
-}
-
 int dsi_conn_get_qsync_min_fps(struct drm_connector_state *conn_state)
 {
 	struct sde_connector_state *sde_conn_state = to_sde_connector_state(conn_state);
@@ -750,6 +729,23 @@ int dsi_conn_get_qsync_min_fps(struct drm_connector_state *conn_state)
 	return priv_info->qsync_min_fps;
 }
 
+int dsi_conn_get_avr_step_fps(struct drm_connector_state *conn_state)
+{
+	struct sde_connector_state *sde_conn_state = to_sde_connector_state(conn_state);
+	struct msm_display_mode *msm_mode;
+	struct dsi_display_mode_priv_info *priv_info;
+
+	if (!sde_conn_state)
+		return -EINVAL;
+
+	msm_mode = &sde_conn_state->msm_mode;
+	if (!msm_mode || !msm_mode->private)
+		return -EINVAL;
+
+	priv_info = (struct dsi_display_mode_priv_info *)(msm_mode->private);
+	return priv_info->avr_step_fps;
+}
+
 int dsi_conn_set_info_blob(struct drm_connector *connector,
 		void *info, void *display, struct msm_mode_info *mode_info)
 {
@@ -798,8 +794,6 @@ int dsi_conn_set_info_blob(struct drm_connector *connector,
 	switch (panel->panel_mode) {
 	case DSI_OP_VIDEO_MODE:
 		sde_kms_info_add_keystr(info, "panel mode", "video");
-		if (panel->avr_caps.avr_step_fps_list_len)
-			dsi_conn_set_avr_step_info(panel, info);
 		break;
 	case DSI_OP_CMD_MODE:
 		sde_kms_info_add_keystr(info, "panel mode", "command");