drm/i915/vga: Add more VGACNTRL bits

Define a pile of extra VGACNTRL bits. We don't really have
any real use for most of these but nicer to have them all
in one place rather than trawling the specs when one wants
to know what's in there.

I will have some real use for the CHV pipe select bits later.

Signed-off-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Reviewed-by: Jani Nikula <[e-mail]>

drivers/gpu/drm/i915/i915_reg.h

···
 /* VBIOS regs */
 #define VGACNTRL		_MMIO(0x71400)
 #define   VGA_DISP_DISABLE			REG_BIT(31)
-#define   VGA_2X_MODE				REG_BIT(30)
-#define   VGA_PIPE_SEL_MASK			REG_BIT(29)
+#define   VGA_2X_MODE				REG_BIT(30) /* pre-ilk */
+#define   VGA_PIPE_SEL_MASK			REG_BIT(29) /* pre-ivb */
 #define   VGA_PIPE_SEL(pipe)			REG_FIELD_PREP(VGA_PIPE_SEL_MASK, (pipe))
+#define   VGA_PIPE_SEL_MASK_CHV			REG_GENMASK(29, 28) /* chv */
+#define   VGA_PIPE_SEL_CHV(pipe)		REG_FIELD_PREP(VGA_PIPE_SEL_MASK_CHV, (pipe))
+#define   VGA_BORDER_ENABLE			REG_BIT(26)
+#define   VGA_PIPE_CSC_ENABLE			REG_BIT(24) /* ilk+ */
+#define   VGA_CENTERING_ENABLE_MASK		REG_GENMASK(25, 24) /* pre-ilk */
+#define   VGA_PALETTE_READ_SEL			REG_BIT(23) /* pre-ivb */
+#define   VGA_PALETTE_A_WRITE_DISABLE		REG_BIT(22) /* pre-ivb */
+#define   VGA_PALETTE_B_WRITE_DISABLE		REG_BIT(21) /* pre-ivb */
+#define   VGA_LEGACY_8BIT_PALETTE_ENABLE	REG_BIT(20)
+#define   VGA_PALETTE_BYPASS			REG_BIT(19)
+#define   VGA_NINE_DOT_DISABLE			REG_BIT(18)
+#define   VGA_PALETTE_READ_SEL_HI_CHV		REG_BIT(15) /* chv */
+#define   VGA_PALETTE_C_WRITE_DISABLE_CHV	REG_BIT(14) /* chv */
+#define   VGA_ACTIVE_THROTTLING_MASK		REG_GENMASK(15, 12) /* ilk+ */
+#define   VGA_BLANK_THROTTLING_MASK		REG_GENMASK(11, 8) /* ilk+ */
+#define   VGA_BLINK_DUTY_CYCLE_MASK		REG_GENMASK(7, 6)
+#define   VGA_VSYNC_BLINK_RATE_MASK		REG_GENMASK(5, 0)
 
 #define VLV_VGACNTRL		_MMIO(VLV_DISPLAY_BASE + 0x71400)