RK3288 android7.1显示屏幕修改

0.dts中配置1920x1080的分辨率
1.build.prop添加下面属性：
persist.sys.framebuffer.main=1920x600@60
2.hardware/rockchip/hwcomposer合入下面修改：

diff --git a/hwcomposer.cpp b/hwcomposer.cpp
index 0fd2177…3ad13a9 100755
— a/hwcomposer.cpp
+++ b/hwcomposer.cpp
@@ -3498,8 +3498,10 @@ static int hwc_get_display_configs(struct hwc_composer_device_1 *dev,

char framebuffer_size[PROPERTY_VALUE_MAX];
uint32_t width = 0, height = 0 , vrefresh = 0 ;

• if (display == HWC_DISPLAY_PRIMARY)
  property_get(“persist.sys.framebuffer.main”, framebuffer_size, “use_baseparameter”);

• else if(display == HWC_DISPLAY_EXTERNAL)
• property_get(“persist.sys.framebuffer.aux”, framebuffer_size, “use_baseparameter”);
  /*
  • if unset framebuffer_size, get it from baseparameter , by libin
    */

@@ -2298,7 +2301,8 @@ static int hwc_prepare(hwc_composer_device_1_t *dev, size_t num_displays,
hd->rel_yres = mode.v_display();
hd->v_total = mode.v_total();
hd->w_scale = (float)mode.h_display() / hd->framebuffer_width;

• hd->h_scale = (float)mode.v_display() / hd->framebuffer_height;

• //hd->h_scale = (float)mode.v_display() / hd->framebuffer_height;
• hd->h_scale = 1.0;
  int fbSize = hd->framebuffer_width * hd->framebuffer_height;
  //get plane size for display
  std::vector& plane_groups = ctx->drm.GetPlaneGroups();
  @@ -3638,7 +3647,8 @@ static int hwc_set_active_config(struct hwc_composer_device_1 *dev, int display,
  return -ENOENT;
  }
  hd->w_scale = (float)mode.h_display() / hd->framebuffer_width;

• hd->h_scale = (float)mode.v_display() / hd->framebuffer_height;

• //hd->h_scale = (float)mode.v_display() / hd->framebuffer_height;

• hd->h_scale = 1.0;

  c->set_current_mode(mode);
  ctx->drm.UpdateDisplayRoute();