vesa: fold framebuffer driver into vesa driver.

* The app_server isn't designed to support two fallback drivers, so
  on systems using UEFI to boot, the framebuffer driver will often
  win when other drivers would likely work on those systems.

build/jam/images/definitions/minimum

@@ -144,7 +144,7 @@ SYSTEM_NETWORK_PROTOCOLS =
 
 SYSTEM_ADD_ONS_ACCELERANTS = [ FFilterByBuildFeatures
 	x86,x86_64 @{
-		framebuffer.accelerant vesa.accelerant
+		vesa.accelerant
 	}@ # x86,x86_64
 ] ;
 
@@ -172,7 +172,7 @@ SYSTEM_ADD_ONS_DRIVERS_AUDIO_OLD = ;
 
 SYSTEM_ADD_ONS_DRIVERS_GRAPHICS = [ FFilterByBuildFeatures
 	x86,x86_64 @{
-		framebuffer vesa
+		vesa
 	}@ # x86,x86_64
 ] ;
 

src/add-ons/accelerants/vesa/accelerant.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright 2005-2008, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+ * Copyright 2016-207, Jessica Hamilton, jessica.l.hamilton@gmail.com.
  * Distributed under the terms of the MIT License.
  */
 
@@ -55,7 +56,7 @@ AreaCloner::~AreaCloner()
 }
 
 
-area_id 
+area_id
 AreaCloner::Clone(const char *name, void **_address, uint32 spec,
 	uint32 protection, area_id sourceArea)
 {
@@ -64,7 +65,7 @@ AreaCloner::Clone(const char *name, void **_address, uint32 spec,
 }
 
 
-void 
+void
 AreaCloner::Keep()
 {
 	fArea = -1;
@@ -111,8 +112,11 @@ init_common(int device, bool isClone)
 		return status;
 	}
 
-	gInfo->vesa_modes = (vesa_mode *)((uint8 *)gInfo->shared_info
-		+ gInfo->shared_info->vesa_mode_offset);
+	if (gInfo->shared_info->vesa_mode_count == 0)
+		gInfo->vesa_modes = NULL;
+	else
+		gInfo->vesa_modes = (vesa_mode *)((uint8 *)gInfo->shared_info
+			+ gInfo->shared_info->vesa_mode_offset);
 
 	sharedCloner.Keep();
 	return B_OK;
@@ -146,7 +150,7 @@ vesa_init_accelerant(int device)
 	TRACE(("vesa_init_accelerant()\n"));
 
 	status_t status = init_common(device, false);
-	if (status != B_OK) 
+	if (status != B_OK)
 		return status;
 
 	status = create_mode_list();
@@ -198,7 +202,7 @@ vesa_clone_accelerant(void *info)
 	status = gInfo->mode_list_area = clone_area(
 		"vesa cloned modes", (void **)&gInfo->mode_list,
 		B_ANY_ADDRESS, B_READ_AREA, gInfo->shared_info->mode_list_area);
-	if (status < B_OK) 
+	if (status < B_OK)
 		goto err2;
 
 	return B_OK;

src/add-ons/accelerants/vesa/mode.cpp

@@ -53,6 +53,16 @@ is_mode_supported(display_mode* mode)
 {
 	vesa_mode* modes = gInfo->vesa_modes;
 
+	if (modes == NULL) {
+		// we're a UEFI framebuffer, just confirm it's our current mode
+		const display_mode &current = gInfo->shared_info->current_mode;
+		return mode->virtual_width == current.virtual_width
+			&& mode->virtual_height == current.virtual_height
+			&& mode->h_display_start == current.h_display_start
+			&& mode->v_display_start == current.v_display_start
+			&& mode->space == current.space;
+	}
+
 	for (uint32 i = gInfo->shared_info->vesa_mode_count; i-- > 0;) {
 		// search mode in VESA mode list
 		// TODO: list is ordered, we could use binary search
@@ -75,12 +85,20 @@ create_mode_list(void)
 {
 	const color_space kVesaSpaces[] = {B_RGB32_LITTLE, B_RGB24_LITTLE,
 		B_RGB16_LITTLE, B_RGB15_LITTLE, B_CMAP8};
+	const color_space kUefiSpaces[] = {
+		(color_space)gInfo->shared_info->current_mode.space
+	};
 
 	uint32 initialModesCount = 0;
+	bool vesaAvailable = gInfo->vesa_modes != NULL;
 
 	// Add initial VESA modes.
-	display_mode* initialModes = (display_mode*)malloc(
-		sizeof(display_mode) * gInfo->shared_info->vesa_mode_count);
+	display_mode* initialModes = NULL;
+	if (vesaAvailable) {
+		initialModes = (display_mode*)malloc(
+			sizeof(display_mode) * gInfo->shared_info->vesa_mode_count);
+	}
+
 	if (initialModes != NULL) {
 		initialModesCount = gInfo->shared_info->vesa_mode_count;
 		vesa_mode* vesaModes = gInfo->vesa_modes;
@@ -91,12 +109,27 @@ create_mode_list(void)
 			fill_display_mode(vesaModes[i].width, vesaModes[i].height,
 				&initialModes[i]);
 		}
+	} else {
+		// UEFI doesn't give us any VESA modes
+		initialModes = (display_mode*)malloc(sizeof(display_mode));
+		if (initialModes != NULL) {
+			initialModesCount = 1;
+
+			compute_display_timing(initialModes[0].virtual_width,
+				initialModes[0].virtual_height, 60, false,
+				&initialModes[0].timing);
+			fill_display_mode(initialModes[0].virtual_width,
+				initialModes[0].virtual_height, &initialModes[0]);
+		}
 	}
 
+	const color_space *colorSpaces = vesaAvailable ? kVesaSpaces : kUefiSpaces;
+	size_t colorSpaceCount = vesaAvailable ?
+		sizeof(kVesaSpaces) / sizeof(kVesaSpaces[0]) : 1;
+
 	gInfo->mode_list_area = create_display_modes("vesa modes",
 		gInfo->shared_info->has_edid ? &gInfo->shared_info->edid_info : NULL,
-		initialModes, initialModesCount,
-		kVesaSpaces, sizeof(kVesaSpaces) / sizeof(kVesaSpaces[0]),
+		initialModes, initialModesCount, colorSpaces, colorSpaceCount,
 		is_mode_supported, &gInfo->mode_list, &gInfo->shared_info->mode_count);
 
 	free(initialModes);
@@ -163,6 +196,10 @@ vesa_set_display_mode(display_mode* _mode)
 		return B_BAD_VALUE;
 
 	vesa_mode* modes = gInfo->vesa_modes;
+	if (modes == NULL)
+		return B_BAD_VALUE;
+			// UEFI has no VESA modes
+
 	for (uint32 i = gInfo->shared_info->vesa_mode_count; i-- > 0;) {
 		// search mode in VESA mode list
 		// TODO: list is ordered, we could use binary search

src/add-ons/kernel/drivers/graphics/vesa/driver.cpp

@@ -53,12 +53,7 @@ init_hardware(void)
 {
 	TRACE((DEVICE_NAME ": init_hardware()\n"));
 
-	// If we don't have the VESA mode info, then we have a
-	// dumb framebuffer, in which case we bail, and leave it
-	// up to the framebuffer driver to handle.
-	return (get_boot_item(VESA_MODES_BOOT_INFO, NULL) != NULL
-			&& get_boot_item(FRAME_BUFFER_BOOT_INFO, NULL) != NULL)
-		? B_OK : B_ERROR;
+	return get_boot_item(FRAME_BUFFER_BOOT_INFO, NULL) != NULL ? B_OK : B_ERROR;
 }
 
 

src/add-ons/kernel/drivers/graphics/vesa/vesa.cpp

@@ -402,10 +402,12 @@ vesa_init(vesa_info& info)
 		memcpy(&sharedInfo.edid_info, edidInfo, sizeof(edid1_info));
 	}
 
-	vbe_get_dpms_capabilities(info.vbe_dpms_capabilities,
-		sharedInfo.dpms_capabilities);
-	if (bufferInfo->depth <= 8)
-		vbe_set_bits_per_gun(info, 8);
+	if (modes != NULL) {
+		vbe_get_dpms_capabilities(info.vbe_dpms_capabilities,
+			sharedInfo.dpms_capabilities);
+		if (bufferInfo->depth <= 8)
+			vbe_set_bits_per_gun(info, 8);
+	}
 
 	dprintf(DEVICE_NAME ": vesa_init() completed successfully!\n");
 	return B_OK;
@@ -477,6 +479,9 @@ vesa_get_dpms_mode(vesa_info& info, uint32& mode)
 	mode = B_DPMS_ON;
 		// we always return a valid mode
 
+	if (info.modes == NULL)
+		return B_ERROR;
+
 	// Prepare BIOS environment
 	bios_state* state;
 	status_t status = vbe_call_prepare(&state);
@@ -514,6 +519,9 @@ out:
 status_t
 vesa_set_dpms_mode(vesa_info& info, uint32 mode)
 {
+	if (info.modes == NULL)
+		return B_ERROR;
+
 	// Only let supported modes through
 	mode &= info.shared_info->dpms_capabilities;