Kconfig: Add choice of framebuffer mode

Rename `FRAMEBUFFER_KEEP_VESA_MODE` to `LINEAR_FRAMEBUFFER` and put
it together with new `VGA_TEXT_FRAMEBUFFER` into a choice. There are
two versions of `LINEAR_FRAMEBUFFER` that differ only in the prompt
and help text (one for `HAVE_VBE_LINEAR_FRAMEBUFFER` and one for
`HAVE_LINEAR_FRAMEBUFFER`). Due to `kconfig_lint` we have to model
that with additional symbols.

Change-Id: I9144351491a14d9bb5e650c14933b646bc83fab0
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/19804
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

3 files changed, 28 insertions, 17 deletions

diff --git a/src/drivers/emulation/qemu/Kconfig b/src/drivers/emulation/qemu/Kconfig
index f8aad8873093..58daaa44876c 100644
--- a/src/drivers/emulation/qemu/Kconfig
+++ b/src/drivers/emulation/qemu/Kconfig
@@ -16,11 +16,11 @@ config DRIVERS_EMULATION_QEMU_BOCHS
 config DRIVERS_EMULATION_QEMU_BOCHS_XRES
 	int "bochs vga xres"
 	default 800
-	depends on FRAMEBUFFER_KEEP_VESA_MODE
+	depends on LINEAR_FRAMEBUFFER
 	depends on DRIVERS_EMULATION_QEMU_BOCHS
 
 config DRIVERS_EMULATION_QEMU_BOCHS_YRES
 	int "bochs vga yres"
 	default 600
-	depends on FRAMEBUFFER_KEEP_VESA_MODE
+	depends on LINEAR_FRAMEBUFFER
 	depends on DRIVERS_EMULATION_QEMU_BOCHS
diff --git a/src/drivers/emulation/qemu/bochs.c b/src/drivers/emulation/qemu/bochs.c
index 74a72471a7cf..48556a815022 100644
--- a/src/drivers/emulation/qemu/bochs.c
+++ b/src/drivers/emulation/qemu/bochs.c
@@ -41,7 +41,6 @@
 #define VBE_DISPI_LFB_ENABLED           0x40
 #define VBE_DISPI_NOCLEARMEM            0x80
 
-#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
 static int width  = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_XRES;
 static int height = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_YRES;
 
@@ -56,11 +55,9 @@ static int bochs_read(int index)
 	outw(index, VBE_DISPI_IOPORT_INDEX);
 	return inw(VBE_DISPI_IOPORT_DATA);
 }
-#endif
 
-static void bochs_init(struct device *dev)
+static void bochs_init_linear_fb(struct device *dev)
 {
-#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
 	struct edid edid;
 	int id, mem, bar;
 	u32 addr;
@@ -115,10 +112,20 @@ static void bochs_init(struct device *dev)
 	edid.panel_bits_per_pixel = 24;
 	edid_set_framebuffer_bits_per_pixel(&edid, 32, 0);
 	set_vbe_mode_info_valid(&edid, addr);
-#else
+}
+
+static void bochs_init_text_mode(struct device *dev)
+{
 	vga_misc_write(0x1);
 	vga_textmode_init();
-#endif
+}
+
+static void bochs_init(struct device *dev)
+{
+	if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER))
+		bochs_init_linear_fb(dev);
+	else if (IS_ENABLED(CONFIG_VGA_TEXT_FRAMEBUFFER))
+		bochs_init_text_mode(dev);
 }
 
 static struct device_operations qemu_graph_ops = {
diff --git a/src/drivers/emulation/qemu/cirrus.c b/src/drivers/emulation/qemu/cirrus.c
index dc20f540ae66..61b329d26cea 100644
--- a/src/drivers/emulation/qemu/cirrus.c
+++ b/src/drivers/emulation/qemu/cirrus.c
@@ -31,11 +31,9 @@
 #include <pc80/vga.h>
 #include <pc80/vga_io.h>
 
-#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
 static int width  = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_XRES;
 static int height = CONFIG_DRIVERS_EMULATION_QEMU_BOCHS_YRES;
 static u32 addr   = 0;
-#endif
 
 enum
   {
@@ -194,7 +192,6 @@ enum
 #define CIRRUS_SR_EXTENDED_MODE_32BPP      0x08
 #define CIRRUS_HIDDEN_DAC_888COLOR 0xc5
 
-#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
 static void
 write_hidden_dac (uint8_t data)
 {
@@ -205,11 +202,9 @@ write_hidden_dac (uint8_t data)
 	inb (0x3c6);
 	outb (data, 0x3c6);
 }
-#endif
 
-static void cirrus_init(struct device *dev)
+static void cirrus_init_linear_fb(struct device *dev)
 {
-#if IS_ENABLED(CONFIG_FRAMEBUFFER_KEEP_VESA_MODE)
 	uint8_t cr_ext, cr_overlay;
 	unsigned pitch = (width * 4) / VGA_CR_PITCH_DIVISOR;
 	uint8_t sr_ext = 0, hidden_dac = 0;
@@ -334,11 +329,20 @@ static void cirrus_init(struct device *dev)
 	edid.panel_bits_per_pixel = 24;
 	edid_set_framebuffer_bits_per_pixel(&edid, 32, 0);
 	set_vbe_mode_info_valid(&edid, addr);
-#else
-	vga_misc_write(0x1);
+}
 
+static void cirrus_init_text_mode(struct device *dev)
+{
+	vga_misc_write(0x1);
 	vga_textmode_init();
-#endif
+}
+
+static void cirrus_init(struct device *dev)
+{
+	if (IS_ENABLED(CONFIG_LINEAR_FRAMEBUFFER))
+		cirrus_init_linear_fb(dev);
+	else if (IS_ENABLED(CONFIG_VGA_TEXT_FRAMEBUFFER))
+		cirrus_init_text_mode(dev);
 }
 
 static struct device_operations qemu_cirrus_graph_ops = {