drm/i915: add DPIO support
ValleyView puts some display related registers like the PLL controls and
dividers behind the DPIO bus. Add simple indirect register access
routines to get to those registers.
v2: move new wait_for macro to intel_drv.h (Ben)
fix DPIO_PKT double write (Ben)
add debugfs file
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 7abdc15..65f5849 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -301,6 +301,61 @@
#define DEBUG_RESET_RENDER (1<<8)
#define DEBUG_RESET_DISPLAY (1<<9)
+/*
+ * DPIO - a special bus for various display related registers to hide behind:
+ * 0x800c: m1, m2, n, p1, p2, k dividers
+ * 0x8014: REF and SFR select
+ * 0x8014: N divider, VCO select
+ * 0x801c/3c: core clock bits
+ * 0x8048/68: low pass filter coefficients
+ * 0x8100: fast clock controls
+ */
+#define DPIO_PKT 0x2100
+#define DPIO_RID (0<<24)
+#define DPIO_OP_WRITE (1<<16)
+#define DPIO_OP_READ (0<<16)
+#define DPIO_PORTID (0x12<<8)
+#define DPIO_BYTE (0xf<<4)
+#define DPIO_BUSY (1<<0) /* status only */
+#define DPIO_DATA 0x2104
+#define DPIO_REG 0x2108
+#define DPIO_CTL 0x2110
+#define DPIO_MODSEL1 (1<<3) /* if ref clk b == 27 */
+#define DPIO_MODSEL0 (1<<2) /* if ref clk a == 27 */
+#define DPIO_SFR_BYPASS (1<<1)
+#define DPIO_RESET (1<<0)
+
+#define _DPIO_DIV_A 0x800c
+#define DPIO_POST_DIV_SHIFT (28) /* 3 bits */
+#define DPIO_K_SHIFT (24) /* 4 bits */
+#define DPIO_P1_SHIFT (21) /* 3 bits */
+#define DPIO_P2_SHIFT (16) /* 5 bits */
+#define DPIO_N_SHIFT (12) /* 4 bits */
+#define DPIO_ENABLE_CALIBRATION (1<<11)
+#define DPIO_M1DIV_SHIFT (8) /* 3 bits */
+#define DPIO_M2DIV_MASK 0xff
+#define _DPIO_DIV_B 0x802c
+#define DPIO_DIV(pipe) _PIPE(pipe, _DPIO_DIV_A, _DPIO_DIV_B)
+
+#define _DPIO_REFSFR_A 0x8014
+#define DPIO_REFSEL_OVERRIDE 27
+#define DPIO_PLL_MODESEL_SHIFT 24 /* 3 bits */
+#define DPIO_BIAS_CURRENT_CTL_SHIFT 21 /* 3 bits, always 0x7 */
+#define DPIO_PLL_REFCLK_SEL_SHIFT 16 /* 2 bits */
+#define DPIO_DRIVER_CTL_SHIFT 12 /* always set to 0x8 */
+#define DPIO_CLK_BIAS_CTL_SHIFT 8 /* always set to 0x5 */
+#define _DPIO_REFSFR_B 0x8034
+#define DPIO_REFSFR(pipe) _PIPE(pipe, _DPIO_REFSFR_A, _DPIO_REFSFR_B)
+
+#define _DPIO_CORE_CLK_A 0x801c
+#define _DPIO_CORE_CLK_B 0x803c
+#define DPIO_CORE_CLK(pipe) _PIPE(pipe, _DPIO_CORE_CLK_A, _DPIO_CORE_CLK_B)
+
+#define _DPIO_LFP_COEFF_A 0x8048
+#define _DPIO_LFP_COEFF_B 0x8068
+#define DPIO_LFP_COEFF(pipe) _PIPE(pipe, _DPIO_LFP_COEFF_A, _DPIO_LFP_COEFF_B)
+
+#define DPIO_FASTCLK_DISABLE 0x8100
/*
* Fence registers
