OMAPDSS: APPLY: Add manager set/unset output ops for omap_overlay_manager

Add set_output/unset_output ops for overlay managers, these form links between
managers and outputs. Create a function in dss features which tell all the
output instances that connect to a manager, use it when a manager tries to set
an output. Add a constraint of not unsetting an output when the manager is
enabled.

Keep the omap_dss_device pointer and set/unset_device ops in overlay_manager for
now to not break things. Keep the dss feature function get_supported_displays
as it's used in some places. These will be removed later.

Signed-off-by: Archit Taneja <archit@ti.com>

5 files changed, 149 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
index 72f3468b0790..3cc47265bb03 100644
--- a/drivers/video/omap2/dss/apply.c
+++ b/drivers/video/omap2/dss/apply.c
@@ -1174,6 +1174,76 @@ err:
         return r;
 }
 
+int dss_mgr_set_output(struct omap_overlay_manager *mgr,
+                struct omap_dss_output *output)
+{
+        int r;
+
+        mutex_lock(&apply_lock);
+
+        if (mgr->output) {
+                DSSERR("manager %s is already connected to an output\n",
+                        mgr->name);
+                r = -EINVAL;
+                goto err;
+        }
+
+        if ((mgr->supported_outputs & output->id) == 0) {
+                DSSERR("output does not support manager %s\n",
+                        mgr->name);
+                r = -EINVAL;
+                goto err;
+        }
+
+        output->manager = mgr;
+        mgr->output = output;
+
+        mutex_unlock(&apply_lock);
+
+        return 0;
+err:
+        mutex_unlock(&apply_lock);
+        return r;
+}
+
+int dss_mgr_unset_output(struct omap_overlay_manager *mgr)
+{
+        int r;
+        struct mgr_priv_data *mp = get_mgr_priv(mgr);
+        unsigned long flags;
+
+        mutex_lock(&apply_lock);
+
+        if (!mgr->output) {
+                DSSERR("failed to unset output, output not set\n");
+                r = -EINVAL;
+                goto err;
+        }
+
+        spin_lock_irqsave(&data_lock, flags);
+
+        if (mp->enabled) {
+                DSSERR("output can't be unset when manager is enabled\n");
+                r = -EINVAL;
+                goto err1;
+        }
+
+        spin_unlock_irqrestore(&data_lock, flags);
+
+        mgr->output->manager = NULL;
+        mgr->output = NULL;
+
+        mutex_unlock(&apply_lock);
+
+        return 0;
+err1:
+        spin_unlock_irqrestore(&data_lock, flags);
+err:
+        mutex_unlock(&apply_lock);
+
+        return r;
+}
+
 static void dss_apply_mgr_timings(struct omap_overlay_manager *mgr,
                 const struct omap_video_timings *timings)
 {
diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
index aecd3bea2e63..b5c0df43547f 100644
--- a/drivers/video/omap2/dss/dss.h
+++ b/drivers/video/omap2/dss/dss.h
@@ -209,6 +209,9 @@ void dss_mgr_get_info(struct omap_overlay_manager *mgr,
 int dss_mgr_set_device(struct omap_overlay_manager *mgr,
                 struct omap_dss_device *dssdev);
 int dss_mgr_unset_device(struct omap_overlay_manager *mgr);
+int dss_mgr_set_output(struct omap_overlay_manager *mgr,
+                struct omap_dss_output *output);
+int dss_mgr_unset_output(struct omap_overlay_manager *mgr);
 void dss_mgr_set_timings(struct omap_overlay_manager *mgr,
                 const struct omap_video_timings *timings);
 void dss_mgr_set_lcd_config(struct omap_overlay_manager *mgr,
diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index 406913949e2c..bfe7fc7b8593 100644
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -47,6 +47,7 @@ struct omap_dss_features {
         const int num_mgrs;
         const int num_ovls;
         const enum omap_display_type *supported_displays;
+        const enum omap_dss_output_id *supported_outputs;
         const enum omap_color_mode *supported_color_modes;
         const enum omap_overlay_caps *overlay_caps;
         const char * const *clksrc_names;
@@ -172,6 +173,63 @@ static const enum omap_display_type omap5_dss_supported_displays[] = {
         OMAP_DISPLAY_TYPE_DSI,
 };
 
+static const enum omap_dss_output_id omap2_dss_supported_outputs[] = {
+        /* OMAP_DSS_CHANNEL_LCD */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI,
+
+        /* OMAP_DSS_CHANNEL_DIGIT */
+        OMAP_DSS_OUTPUT_VENC,
+};
+
+static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = {
+        /* OMAP_DSS_CHANNEL_LCD */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1,
+
+        /* OMAP_DSS_CHANNEL_DIGIT */
+        OMAP_DSS_OUTPUT_VENC,
+};
+
+static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = {
+        /* OMAP_DSS_CHANNEL_LCD */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI1,
+
+        /* OMAP_DSS_CHANNEL_DIGIT */
+        OMAP_DSS_OUTPUT_VENC,
+};
+
+static const enum omap_dss_output_id omap4_dss_supported_outputs[] = {
+        /* OMAP_DSS_CHANNEL_LCD */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI1,
+
+        /* OMAP_DSS_CHANNEL_DIGIT */
+        OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI |
+        OMAP_DSS_OUTPUT_DPI,
+
+        /* OMAP_DSS_CHANNEL_LCD2 */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI2,
+};
+
+static const enum omap_dss_output_id omap5_dss_supported_outputs[] = {
+        /* OMAP_DSS_CHANNEL_LCD */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2,
+
+        /* OMAP_DSS_CHANNEL_DIGIT */
+        OMAP_DSS_OUTPUT_HDMI | OMAP_DSS_OUTPUT_DPI,
+
+        /* OMAP_DSS_CHANNEL_LCD2 */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI1,
+
+        /* OMAP_DSS_CHANNEL_LCD3 */
+        OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI |
+        OMAP_DSS_OUTPUT_DSI2,
+};
+
 static const enum omap_color_mode omap2_dss_supported_color_modes[] = {
         /* OMAP_DSS_GFX */
         OMAP_DSS_COLOR_CLUT1 | OMAP_DSS_COLOR_CLUT2 |
@@ -554,6 +612,7 @@ static const struct omap_dss_features omap2_dss_features = {
         .num_mgrs = 2,
         .num_ovls = 3,
         .supported_displays = omap2_dss_supported_displays,
+        .supported_outputs = omap2_dss_supported_outputs,
         .supported_color_modes = omap2_dss_supported_color_modes,
         .overlay_caps = omap2_dss_overlay_caps,
         .clksrc_names = omap2_dss_clk_source_names,
@@ -574,6 +633,7 @@ static const struct omap_dss_features omap3430_dss_features = {
         .num_mgrs = 2,
         .num_ovls = 3,
         .supported_displays = omap3430_dss_supported_displays,
+        .supported_outputs = omap3430_dss_supported_outputs,
         .supported_color_modes = omap3_dss_supported_color_modes,
         .overlay_caps = omap3430_dss_overlay_caps,
         .clksrc_names = omap3_dss_clk_source_names,
@@ -597,6 +657,7 @@ static const struct omap_dss_features am35xx_dss_features = {
         .num_mgrs = 2,
         .num_ovls = 3,
         .supported_displays = omap3430_dss_supported_displays,
+        .supported_outputs = omap3430_dss_supported_outputs,
         .supported_color_modes = omap3_dss_supported_color_modes,
         .overlay_caps = omap3430_dss_overlay_caps,
         .clksrc_names = omap3_dss_clk_source_names,
@@ -616,6 +677,7 @@ static const struct omap_dss_features omap3630_dss_features = {
         .num_mgrs = 2,
         .num_ovls = 3,
         .supported_displays = omap3630_dss_supported_displays,
+        .supported_outputs = omap3630_dss_supported_outputs,
         .supported_color_modes = omap3_dss_supported_color_modes,
         .overlay_caps = omap3630_dss_overlay_caps,
         .clksrc_names = omap3_dss_clk_source_names,
@@ -637,6 +699,7 @@ static const struct omap_dss_features omap4430_es1_0_dss_features  = {
         .num_mgrs = 3,
         .num_ovls = 4,
         .supported_displays = omap4_dss_supported_displays,
+        .supported_outputs = omap4_dss_supported_outputs,
         .supported_color_modes = omap4_dss_supported_color_modes,
         .overlay_caps = omap4_dss_overlay_caps,
         .clksrc_names = omap4_dss_clk_source_names,
@@ -657,6 +720,7 @@ static const struct omap_dss_features omap4430_es2_0_1_2_dss_features = {
         .num_mgrs = 3,
         .num_ovls = 4,
         .supported_displays = omap4_dss_supported_displays,
+        .supported_outputs = omap4_dss_supported_outputs,
         .supported_color_modes = omap4_dss_supported_color_modes,
         .overlay_caps = omap4_dss_overlay_caps,
         .clksrc_names = omap4_dss_clk_source_names,
@@ -677,6 +741,7 @@ static const struct omap_dss_features omap4_dss_features = {
         .num_mgrs = 3,
         .num_ovls = 4,
         .supported_displays = omap4_dss_supported_displays,
+        .supported_outputs = omap4_dss_supported_outputs,
         .supported_color_modes = omap4_dss_supported_color_modes,
         .overlay_caps = omap4_dss_overlay_caps,
         .clksrc_names = omap4_dss_clk_source_names,
@@ -697,6 +762,7 @@ static const struct omap_dss_features omap5_dss_features = {
         .num_mgrs = 3,
         .num_ovls = 4,
         .supported_displays = omap5_dss_supported_displays,
+        .supported_outputs = omap5_dss_supported_outputs,
         .supported_color_modes = omap4_dss_supported_color_modes,
         .overlay_caps = omap4_dss_overlay_caps,
         .clksrc_names = omap5_dss_clk_source_names,
@@ -766,6 +832,11 @@ enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel
         return omap_current_dss_features->supported_displays[channel];
 }
 
+enum omap_dss_output_id dss_feat_get_supported_outputs(enum omap_channel channel)
+{
+        return omap_current_dss_features->supported_outputs[channel];
+}
+
 enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane)
 {
         return omap_current_dss_features->supported_color_modes[plane];
diff --git a/drivers/video/omap2/dss/dss_features.h b/drivers/video/omap2/dss/dss_features.h
index aacad863fa22..89df2aa860d4 100644
--- a/drivers/video/omap2/dss/dss_features.h
+++ b/drivers/video/omap2/dss/dss_features.h
@@ -108,6 +108,7 @@ int dss_feat_get_num_ovls(void);
 unsigned long dss_feat_get_param_min(enum dss_range_param param);
 unsigned long dss_feat_get_param_max(enum dss_range_param param);
 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);
+enum omap_dss_output_id dss_feat_get_supported_outputs(enum omap_channel channel);
 enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane);
 enum omap_overlay_caps dss_feat_get_overlay_caps(enum omap_plane plane);
 bool dss_feat_color_mode_supported(enum omap_plane plane,
diff --git a/drivers/video/omap2/dss/manager.c b/drivers/video/omap2/dss/manager.c
index 383314f222b0..92a2585d04b2 100644
--- a/drivers/video/omap2/dss/manager.c
+++ b/drivers/video/omap2/dss/manager.c
@@ -95,6 +95,8 @@ int dss_init_overlay_managers(struct platform_device *pdev)
 
                 mgr->set_device = &dss_mgr_set_device;
                 mgr->unset_device = &dss_mgr_unset_device;
+                mgr->set_output = &dss_mgr_set_output;
+                mgr->unset_output = &dss_mgr_unset_output;
                 mgr->apply = &omap_dss_mgr_apply;
                 mgr->set_manager_info = &dss_mgr_set_info;
                 mgr->get_manager_info = &dss_mgr_get_info;
@@ -104,6 +106,8 @@ int dss_init_overlay_managers(struct platform_device *pdev)
                 mgr->caps = 0;
                 mgr->supported_displays =
                         dss_feat_get_supported_displays(mgr->id);
+                mgr->supported_outputs =
+                        dss_feat_get_supported_outputs(mgr->id);
 
                 INIT_LIST_HEAD(&mgr->overlays);