drm/rockchip: Add support for Rockchip Soc RGB output interface

Some Rockchip CRTCs, like rv1108 and px30, can directly output parallel
and serial RGB data to panel or conversion chip.

So add a feature-bit for vops to mark the ability for these direct
outputs and add an internal encoder in that case, that can attach to
bridge chipsor panels.

Changes in v7:
    1. forget to delete rockchip_rgb_driver and delete it.
Changes in v6:
    1. Update according to Heiko Stuebner' implemention, rgb output is
       part of vop's feature, should not register as a independent
       driver.
Changes in v5:
    1. add SPDX-License-Identifier tag
Changes in v4:
    1. add support px30;
Changes in v3:
    1. update for rgb-mode move to panel node.
Changes in v2:
    1. add error log when probe failed;
    2. update name_to_output_mode() according to sean's suggest;
    3. Fix uninitialized use of ret.

Signed-off-by: Sandy Huang <hjc@rock-chips.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20180830211207.10480-3-heiko@sntech.de

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 17f9ed688841..0c35a88e33dd 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -42,6 +42,7 @@
 #include "rockchip_drm_fb.h"
 #include "rockchip_drm_psr.h"
 #include "rockchip_drm_vop.h"
+#include "rockchip_rgb.h"
 
 #define VOP_WIN_SET(x, win, name, v) \
 		vop_reg_set(vop, &win->phy->name, win->base, ~0, v, #name)
@@ -93,6 +94,7 @@ struct vop_win {
 	struct vop *vop;
 };
 
+struct rockchip_rgb;
 struct vop {
 	struct drm_crtc crtc;
 	struct device *dev;
@@ -136,6 +138,9 @@ struct vop {
 	/* vop dclk reset */
 	struct reset_control *dclk_rst;
 
+	/* optional internal rgb encoder */
+	struct rockchip_rgb *rgb;
+
 	struct vop_win win[];
 };
 
@@ -1638,6 +1643,14 @@ static int vop_bind(struct device *dev, struct device *master, void *data)
 	if (ret)
 		goto err_disable_pm_runtime;
 
+	if (vop->data->feature & VOP_FEATURE_INTERNAL_RGB) {
+		vop->rgb = rockchip_rgb_init(dev, &vop->crtc, vop->drm_dev);
+		if (IS_ERR(vop->rgb)) {
+			ret = PTR_ERR(vop->rgb);
+			goto err_disable_pm_runtime;
+		}
+	}
+
 	return 0;
 
 err_disable_pm_runtime:
@@ -1650,6 +1663,9 @@ static void vop_unbind(struct device *dev, struct device *master, void *data)
 {
 	struct vop *vop = dev_get_drvdata(dev);
 
+	if (vop->rgb)
+		rockchip_rgb_fini(vop->rgb);
+
 	pm_runtime_disable(dev);
 	vop_destroy_crtc(vop);