drm/radeon/cik: add support for pcie gen1/2/3 switching
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h
index 7e9275e..a1f376e 100644
--- a/drivers/gpu/drm/radeon/cikd.h
+++ b/drivers/gpu/drm/radeon/cikd.h
@@ -35,6 +35,63 @@
#define CG_CLKPIN_CNTL 0xC05001A0
# define XTALIN_DIVIDE (1 << 1)
+/* PCIE registers idx/data 0x38/0x3c */
+#define PCIE_LC_STATUS1 0x1400028 /* PCIE */
+# define LC_REVERSE_RCVR (1 << 0)
+# define LC_REVERSE_XMIT (1 << 1)
+# define LC_OPERATING_LINK_WIDTH_MASK (0x7 << 2)
+# define LC_OPERATING_LINK_WIDTH_SHIFT 2
+# define LC_DETECTED_LINK_WIDTH_MASK (0x7 << 5)
+# define LC_DETECTED_LINK_WIDTH_SHIFT 5
+
+#define PCIE_LC_LINK_WIDTH_CNTL 0x100100A2 /* PCIE */
+# define LC_LINK_WIDTH_SHIFT 0
+# define LC_LINK_WIDTH_MASK 0x7
+# define LC_LINK_WIDTH_X0 0
+# define LC_LINK_WIDTH_X1 1
+# define LC_LINK_WIDTH_X2 2
+# define LC_LINK_WIDTH_X4 3
+# define LC_LINK_WIDTH_X8 4
+# define LC_LINK_WIDTH_X16 6
+# define LC_LINK_WIDTH_RD_SHIFT 4
+# define LC_LINK_WIDTH_RD_MASK 0x70
+# define LC_RECONFIG_ARC_MISSING_ESCAPE (1 << 7)
+# define LC_RECONFIG_NOW (1 << 8)
+# define LC_RENEGOTIATION_SUPPORT (1 << 9)
+# define LC_RENEGOTIATE_EN (1 << 10)
+# define LC_SHORT_RECONFIG_EN (1 << 11)
+# define LC_UPCONFIGURE_SUPPORT (1 << 12)
+# define LC_UPCONFIGURE_DIS (1 << 13)
+# define LC_DYN_LANES_PWR_STATE(x) ((x) << 21)
+# define LC_DYN_LANES_PWR_STATE_MASK (0x3 << 21)
+# define LC_DYN_LANES_PWR_STATE_SHIFT 21
+
+#define PCIE_LC_SPEED_CNTL 0x100100A4 /* PCIE */
+# define LC_GEN2_EN_STRAP (1 << 0)
+# define LC_GEN3_EN_STRAP (1 << 1)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_EN (1 << 2)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_MASK (0x3 << 3)
+# define LC_TARGET_LINK_SPEED_OVERRIDE_SHIFT 3
+# define LC_FORCE_EN_SW_SPEED_CHANGE (1 << 5)
+# define LC_FORCE_DIS_SW_SPEED_CHANGE (1 << 6)
+# define LC_FORCE_EN_HW_SPEED_CHANGE (1 << 7)
+# define LC_FORCE_DIS_HW_SPEED_CHANGE (1 << 8)
+# define LC_INITIATE_LINK_SPEED_CHANGE (1 << 9)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_MASK (0x3 << 10)
+# define LC_SPEED_CHANGE_ATTEMPTS_ALLOWED_SHIFT 10
+# define LC_CURRENT_DATA_RATE_MASK (0x3 << 13) /* 0/1/2 = gen1/2/3 */
+# define LC_CURRENT_DATA_RATE_SHIFT 13
+# define LC_CLR_FAILED_SPD_CHANGE_CNT (1 << 16)
+# define LC_OTHER_SIDE_EVER_SENT_GEN2 (1 << 18)
+# define LC_OTHER_SIDE_SUPPORTS_GEN2 (1 << 19)
+# define LC_OTHER_SIDE_EVER_SENT_GEN3 (1 << 20)
+# define LC_OTHER_SIDE_SUPPORTS_GEN3 (1 << 21)
+
+#define PCIE_LC_CNTL4 0x100100B6 /* PCIE */
+# define LC_REDO_EQ (1 << 5)
+# define LC_SET_QUIESCE (1 << 13)
+
+/* direct registers */
#define PCIE_INDEX 0x38
#define PCIE_DATA 0x3C