RK3588 Android12强制HDMI输出特殊分辨率timing

修改LinuxKernelHDMI驱动以支持3840x1436分辨率

原创已于 2023-08-26 17:27:38 修改 · 4.6k 阅读

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#android

于 2023-08-26 17:25:27 首次发布

1.把白名单去掉，device/rockchip/common/device.mk中如下位置注释掉
PRODUCT_COPY_FILES += \
$(TARGET_DEVICE_DIR)/resolution_white.xml:/system/usr/share/resolution_white.xml
2.安照下面补丁修改，在kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c的默认数组中dw_hdmi_default_modes[] 加入分辨率3840x1436
将数组kernel-5.10/drivers/gpu/drm/drm_edid.c的edid_cea_modes_1[]第127个替换成需要修改的分辨率timming

3.在屏参中打开hdmi0,将hdmi0_mode改为127，这里主要是实现将kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c里面的dw_hdmi_connector_get_modes函数选用强制修改的HDMI屏参数timing。

diff --git a/kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index badaee53fe..fca19a43dd 100644
--- a/kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/kernel-5.10/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -170,6 +170,11 @@ static const struct drm_display_mode dw_hdmi_default_modes[] = {
4104, 4400, 0, 2160, 2168, 2178, 2250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
+ /* 127 - 3840x1436@30Hz 16:9 */
+ { DRM_MODE("3840x1436", DRM_MODE_TYPE_DRIVER, 297000, 3840, 4016,
+ 4104, 4400, 0, 1436, 2168, 2178, 2250, 0,
+ DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
+ .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
};

enum frl_mask {
@@ -2117,6 +2122,9 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
case 97:
def_index=7;
break;
+ case 127:
+ def_index=9;
+ break;
default:
def_index=1;
break;
diff --git a/kernel-5.10/drivers/gpu/drm/drm_edid.c b/kernel-5.10/drivers/gpu/drm/drm_edid.c
index 4fdfb41b91..640f6ffd7e 100644
--- a/kernel-5.10/drivers/gpu/drm/drm_edid.c
+++ b/kernel-5.10/drivers/gpu/drm/drm_edid.c
@@ -1372,10 +1372,15 @@ static const struct drm_display_mode edid_cea_modes_1[] = {
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27, },
/* 127 - 5120x2160@100Hz 64:27 */
- { DRM_MODE("5120x2160", DRM_MODE_TYPE_DRIVER, 1485000, 5120, 6216,
- 6304, 6600, 0, 2160, 2168, 2178, 2250, 0,
+ // { DRM_MODE("5120x2160", DRM_MODE_TYPE_DRIVER, 1485000, 5120, 6216,
+ // 6304, 6600, 0, 2160, 2168, 2178, 2250, 0,
+ // DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
+ // .picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27, },
+ /* 128 - 3840x1436@30Hz 16:9 */
+ { DRM_MODE("3840x1436", DRM_MODE_TYPE_DRIVER, 297000, 3840, 4016,
+ 4104, 4400, 0, 1436, 2168, 2178, 2250, 0,
DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC),
- .picture_aspect_ratio = HDMI_PICTURE_ASPECT_64_27, },
+ .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, },
};