2 files changed, 15 insertions, 7 deletions
diff --git a/src/drivers/display.cpp b/src/drivers/display.cpp
index 6ec82787..d3c2c923 100644
--- a/src/drivers/display.cpp
+++ b/src/drivers/display.cpp
@@ -60,7 +60,7 @@ auto Display::create(GpioExpander* expander,
                      const displays::InitialisationData& init_data)
     -> std::unique_ptr<Display> {
   // First, turn on the LED backlight.
-  expander->set_pin(GpioExpander::DISPLAY_LED, 0);
+  expander->set_pin(GpioExpander::DISPLAY_LED, 1);
   expander->set_pin(GpioExpander::DISPLAY_POWER_ENABLE, 1);
   expander->Write();
 
@@ -118,6 +118,14 @@ Display::Display(GpioExpander* gpio, spi_device_handle_t handle)
 Display::~Display() {}
 
 void Display::SendInitialisationSequence(const uint8_t* data) {
+  // Reset the display manually to get it into a predictable state.
+  gpio_->set_pin(GpioExpander::DISPLAY_RESET, false);
+  gpio_->Write();
+  vTaskDelay(pdMS_TO_TICKS(10));
+  gpio_->set_pin(GpioExpander::DISPLAY_RESET, false);
+  gpio_->Write();
+  vTaskDelay(pdMS_TO_TICKS(10));
+
   // Hold onto the bus for the entire sequence so that we're not interrupted
   // part way through.
   spi_device_acquire_bus(handle_, portMAX_DELAY);
diff --git a/src/drivers/include/gpio_expander.hpp b/src/drivers/include/gpio_expander.hpp
index a6e96d87..d03c26b0 100644
--- a/src/drivers/include/gpio_expander.hpp
+++ b/src/drivers/include/gpio_expander.hpp
@@ -49,8 +49,8 @@ class GpioExpander {
   // Port B:
   // 0 - 3.5mm jack detect (active low)
   // 1 - unused
-  // 2 - volume up
-  // 3 - volume down
+  // 2 - trackpad int
+  // 3 - display reset (active low)
   // 4 - lock switch
   // 5 - touchpad interupt
   // 6 - display DR
@@ -111,10 +111,10 @@ class GpioExpander {
     // Port B
     PHONE_DETECT = 8,  // Active-high input
     // UNUSED = 9,
-    VOL_UP = 10,
-    VOL_DOWN = 11,
-    LOCK = 12,
-    TOUCHPAD_INT = 13,
+    TOUCHPAD_INT = 10,
+    DISPLAY_RESET = 11,
+    // UNUSED = 12,
+    // UNUSED = 13,
     DISPLAY_DR = 14,
     DISPLAY_LED = 15,
   };