drm/i915/icl: Fix MG_DP_MODE() register programming

Fix the order of lane, port parameters passed to the register macro.

Note that this was already partly fixed by commit
37fc7845df7b6 ("drm/i915: Call MG_DP_MODE() macro with the right parameters order")

While at it simplify things by using the macro directly instead of an
unnecessary redirection via an array.

v2:
- Add a note the commit message about simplifying things. (José)

Fixes: 58106b7d816e1 ("drm/i915: Make MG PHY macros semantically consistent")
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Aditya Swarup <aditya.swarup@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190419071026.32370-1-imre.deak@intel.com
(cherry picked from commit 9c11b12184bb01d8ba2c48e655509b184f02c769)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 24f9106..f181c26 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -2905,21 +2905,20 @@ static void icl_enable_phy_clock_gating(struct intel_digital_port *dig_port)
        struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
        enum port port = dig_port->base.port;
        enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
-       i915_reg_t mg_regs[2] = { MG_DP_MODE(0, port), MG_DP_MODE(1, port) };
        u32 val;
-       int i;
+       int ln;
 
        if (tc_port == PORT_TC_NONE)
                return;
 
-       for (i = 0; i < ARRAY_SIZE(mg_regs); i++) {
-               val = I915_READ(mg_regs[i]);
+       for (ln = 0; ln < 2; ln++) {
+               val = I915_READ(MG_DP_MODE(ln, port));
                val |= MG_DP_MODE_CFG_TR2PWR_GATING |
                       MG_DP_MODE_CFG_TRPWR_GATING |
                       MG_DP_MODE_CFG_CLNPWR_GATING |
                       MG_DP_MODE_CFG_DIGPWR_GATING |
                       MG_DP_MODE_CFG_GAONPWR_GATING;
-               I915_WRITE(mg_regs[i], val);
+               I915_WRITE(MG_DP_MODE(ln, port), val);
        }
 
        val = I915_READ(MG_MISC_SUS0(tc_port));
@@ -2938,21 +2937,20 @@ static void icl_disable_phy_clock_gating(struct intel_digital_port *dig_port)
        struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
        enum port port = dig_port->base.port;
        enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
-       i915_reg_t mg_regs[2] = { MG_DP_MODE(port, 0), MG_DP_MODE(port, 1) };
        u32 val;
-       int i;
+       int ln;
 
        if (tc_port == PORT_TC_NONE)
                return;
 
-       for (i = 0; i < ARRAY_SIZE(mg_regs); i++) {
-               val = I915_READ(mg_regs[i]);
+       for (ln = 0; ln < 2; ln++) {
+               val = I915_READ(MG_DP_MODE(ln, port));
                val &= ~(MG_DP_MODE_CFG_TR2PWR_GATING |
                         MG_DP_MODE_CFG_TRPWR_GATING |
                         MG_DP_MODE_CFG_CLNPWR_GATING |
                         MG_DP_MODE_CFG_DIGPWR_GATING |
                         MG_DP_MODE_CFG_GAONPWR_GATING);
-               I915_WRITE(mg_regs[i], val);
+               I915_WRITE(MG_DP_MODE(ln, port), val);
        }
 
        val = I915_READ(MG_MISC_SUS0(tc_port));