hwc: Add support for panel resolution switch
Add support for panel resolution switch. This feature makes use of
the Linux modedb feature that lists available modes in
/sys/class/graphics/fb0/modes and accepts a mode change when written
to /sys/class/graphics/fb0/mode
Clients can link to APIs exposed in display_config.h, these
internally resolve to binder calls into HWC. For debugging, mode
changes can be made over binder using shell commands.
adb shell service call display.qservice CODE ARGS
ARGS can include config index and display (only primary supported)
setActiveConfig():
adb shell service call display.qservice 25 i32 INDEX i32 0
getActiveConfig():
adb shell service call display.qservice 26 i32 0
getConfigCount():
adb shell service call display.qservice 27 i32 0
getDisplayAttributes():
adb shell service call display.qservice 28 i32 INDEX i32 0
Change-Id: I97d34cc9c0e521a3bd5c948eeea6d1e07db7b7ff
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index a9cd150..043d7c2 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -93,33 +93,38 @@
(xres < MIN_DISPLAY_XRES || yres < MIN_DISPLAY_YRES));
}
-void changeResolution(hwc_context_t *ctx, int xres_orig, int yres_orig,
- int width, int height) {
+static void handleFbScaling(hwc_context_t *ctx, int xresPanel, int yresPanel,
+ int width, int height) {
+ const int dpy = HWC_DISPLAY_PRIMARY;
//Store original display resolution.
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].xres_new = xres_orig;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].yres_new = yres_orig;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].customFBSize = false;
+ ctx->dpyAttr[dpy].xresFB = xresPanel;
+ ctx->dpyAttr[dpy].yresFB = yresPanel;
+ ctx->dpyAttr[dpy].fbScaling = false;
char property[PROPERTY_VALUE_MAX] = {'\0'};
char *yptr = NULL;
if (property_get("debug.hwc.fbsize", property, NULL) > 0) {
yptr = strcasestr(property,"x");
if(yptr) {
- int xres_new = atoi(property);
- int yres_new = atoi(yptr + 1);
- if (isValidResolution(ctx,xres_new,yres_new) &&
- xres_new != xres_orig && yres_new != yres_orig) {
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].xres_new = xres_new;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].yres_new = yres_new;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].customFBSize = true;
+ int xresFB = atoi(property);
+ int yresFB = atoi(yptr + 1);
+ if (isValidResolution(ctx, xresFB, yresFB) &&
+ xresFB != xresPanel && yresFB != yresPanel) {
+ ctx->dpyAttr[dpy].xresFB = xresFB;
+ ctx->dpyAttr[dpy].yresFB = yresFB;
+ ctx->dpyAttr[dpy].fbScaling = true;
- //Caluculate DPI according to changed resolution.
- float xdpi = ((float)xres_new * 25.4f) / (float)width;
- float ydpi = ((float)yres_new * 25.4f) / (float)height;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].xdpi = xdpi;
- ctx->dpyAttr[HWC_DISPLAY_PRIMARY].ydpi = ydpi;
+ //Calculate DPI according to changed resolution.
+ float xdpi = ((float)xresFB * 25.4f) / (float)width;
+ float ydpi = ((float)yresFB * 25.4f) / (float)height;
+ ctx->dpyAttr[dpy].xdpi = xdpi;
+ ctx->dpyAttr[dpy].ydpi = ydpi;
}
}
}
+ ctx->dpyAttr[dpy].fbWidthScaleRatio = (float) ctx->dpyAttr[dpy].xres /
+ (float) ctx->dpyAttr[dpy].xresFB;
+ ctx->dpyAttr[dpy].fbHeightScaleRatio = (float) ctx->dpyAttr[dpy].yres /
+ (float) ctx->dpyAttr[dpy].yresFB;
}
// Initialize hdmi display attributes based on
@@ -234,8 +239,7 @@
ctx->dpyAttr[HWC_DISPLAY_PRIMARY].vsync_period =
(uint32_t)(1000000000l / fps);
- //To change resolution of primary display
- changeResolution(ctx, info.xres, info.yres, info.width, info.height);
+ handleFbScaling(ctx, info.xres, info.yres, info.width, info.height);
//Unblank primary on first boot
if(ioctl(fb_fd, FBIOBLANK,FB_BLANK_UNBLANK) < 0) {