[PATCH v3 08/12] drm/imx: parallel-display: switch to drm_panel_bridge

[Dmitry Baryshkov]

Defer panel handling to drm_panel_bridge, unifying codepaths for the
panel and bridge cases.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/imx/ipuv3/Kconfig            |  3 ++-
 drivers/gpu/drm/imx/ipuv3/parallel-display.c | 36 +++++++---------------------
 2 files changed, 10 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/imx/ipuv3/Kconfig 
b/drivers/gpu/drm/imx/ipuv3/Kconfig
index 6abcf9c833d4..f083d313d1d3 100644
--- a/drivers/gpu/drm/imx/ipuv3/Kconfig
+++ b/drivers/gpu/drm/imx/ipuv3/Kconfig
@@ -11,8 +11,9 @@ config DRM_IMX
 
 config DRM_IMX_PARALLEL_DISPLAY
        tristate "Support for parallel displays"
-       select DRM_PANEL
        depends on DRM_IMX
+       select DRM_BRIDGE
+       select DRM_PANEL_BRIDGE
        select VIDEOMODE_HELPERS
 
 config DRM_IMX_TVE
diff --git a/drivers/gpu/drm/imx/ipuv3/parallel-display.c 
b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
index 4d17fb96e77c..9ac2a94fa62b 100644
--- a/drivers/gpu/drm/imx/ipuv3/parallel-display.c
+++ b/drivers/gpu/drm/imx/ipuv3/parallel-display.c
@@ -18,7 +18,6 @@
 #include <drm/drm_bridge.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_of.h>
-#include <drm/drm_panel.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
 
@@ -36,7 +35,6 @@ struct imx_parallel_display {
        u32 bus_format;
        u32 bus_flags;
        struct drm_display_mode mode;
-       struct drm_panel *panel;
        struct drm_bridge *next_bridge;
 };
 
@@ -56,10 +54,6 @@ static int imx_pd_connector_get_modes(struct drm_connector 
*connector)
        struct device_node *np = imxpd->dev->of_node;
        int num_modes;
 
-       num_modes = drm_panel_get_modes(imxpd->panel, connector);
-       if (num_modes > 0)
-               return num_modes;
-
        if (np) {
                struct drm_display_mode *mode = drm_mode_create(connector->dev);
                int ret;
@@ -84,22 +78,6 @@ static int imx_pd_connector_get_modes(struct drm_connector 
*connector)
        return num_modes;
 }
 
-static void imx_pd_bridge_enable(struct drm_bridge *bridge)
-{
-       struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
-
-       drm_panel_prepare(imxpd->panel);
-       drm_panel_enable(imxpd->panel);
-}
-
-static void imx_pd_bridge_disable(struct drm_bridge *bridge)
-{
-       struct imx_parallel_display *imxpd = bridge_to_imxpd(bridge);
-
-       drm_panel_disable(imxpd->panel);
-       drm_panel_unprepare(imxpd->panel);
-}
-
 static const u32 imx_pd_bus_fmts[] = {
        MEDIA_BUS_FMT_RGB888_1X24,
        MEDIA_BUS_FMT_BGR888_1X24,
@@ -237,8 +215,6 @@ static const struct drm_connector_helper_funcs 
imx_pd_connector_helper_funcs = {
 };
 
 static const struct drm_bridge_funcs imx_pd_bridge_funcs = {
-       .enable = imx_pd_bridge_enable,
-       .disable = imx_pd_bridge_disable,
        .atomic_reset = drm_atomic_helper_bridge_reset,
        .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
        .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
@@ -315,10 +291,14 @@ static int imx_pd_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        /* port@1 is the output port */
-       ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel,
-                                         &imxpd->next_bridge);
-       if (ret && ret != -ENODEV)
-               return ret;
+       imxpd->next_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
+       if (IS_ERR(imxpd->next_bridge)) {
+               ret = PTR_ERR(imxpd->next_bridge);
+               if (ret != -ENODEV)
+                       return ret;
+
+               imxpd->next_bridge = NULL;
+       }
 
        ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
        if (!ret) {

-- 
2.39.2