feat(core): improve dma2d/gfx_bitblt init/deinit

[no changelog]

core/embed/gfx/bitblt/dma2d_bitblt.h

@@ -25,6 +25,9 @@
 // Initializes DMA2D peripheral
 void dma2d_init(void);
 
+// Deinitializes DMA2D peripheral
+void dma2d_deinit(void);
+
 // Waits until any pending DMA2D operation is finished
 void dma2d_wait(void);
 

core/embed/gfx/bitblt/gfx_bitblt.c

@@ -25,6 +25,12 @@ void gfx_bitblt_init(void) {
 #endif
 }
 
+void gfx_bitblt_deinit(void) {
+#if defined(USE_DMA2D) && !defined(TREZOR_EMULATOR)
+  dma2d_deinit();
+#endif
+}
+
 void gfx_bitblt_wait(void) {
 #if defined(USE_DMA2D) && !defined(TREZOR_EMULATOR)
   dma2d_wait();

core/embed/gfx/bitblt/stm32/dma2d_bitblt.c

@@ -40,7 +40,19 @@ static inline bool dma2d_accessible(const void* ptr) {
 #endif
 }
 
-void dma2d_init(void) { __HAL_RCC_DMA2D_CLK_ENABLE(); }
+void dma2d_init(void) {
+  __HAL_RCC_DMA2D_FORCE_RESET();
+  __HAL_RCC_DMA2D_RELEASE_RESET();
+
+  __HAL_RCC_DMA2D_CLK_ENABLE();
+}
+
+void dma2d_deinit(void) {
+  __HAL_RCC_DMA2D_CLK_DISABLE();
+
+  __HAL_RCC_DMA2D_FORCE_RESET();
+  __HAL_RCC_DMA2D_RELEASE_RESET();
+}
 
 void dma2d_wait(void) {
   while (HAL_DMA2D_PollForTransfer(&dma2d_handle, 10) != HAL_OK)

core/embed/gfx/inc/gfx/gfx_bitblt.h

@@ -78,6 +78,9 @@ typedef struct {
 // Initializes bitblt operations
 void gfx_bitblt_init(void);
 
+// Deinitializes bitblt operations
+void gfx_bitblt_deinit(void);
+
 // If the bitblt operation is asynchronous, waits until it's finished
 void gfx_bitblt_wait(void);
 

core/embed/projects/boardloader/main.c

@@ -103,6 +103,7 @@ static void drivers_deinit(void) {
 #ifdef FIXED_HW_DEINIT
   // TODO
 #endif
+  gfx_bitblt_deinit();
   display_deinit(DISPLAY_JUMP_BEHAVIOR);
 #ifdef USE_POWERCTL
   powerctl_deinit();

core/embed/projects/bootloader/main.c

@@ -136,6 +136,7 @@ static void drivers_deinit(void) {
 #ifdef FIXED_HW_DEINIT
   // TODO
 #endif
+  gfx_bitblt_deinit();
   display_deinit(DISPLAY_JUMP_BEHAVIOR);
   ensure_compatible_settings();
 }