drm/i915i/glk: Program MIPI_CLOCK_CTRL only for BXT

Register MIPI_CLOCK_CTRL is applicable only
for BXT platform. Future platform have other
registers to program the escape clock dividers.

Signed-off-by: Deepak M <m.deepak@intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1487335415-14766-6-git-send-email-madhav.chauhan@intel.com

diff --git a/drivers/gpu/drm/i915/intel_dsi_pll.c b/drivers/gpu/drm/i915/intel_dsi_pll.c
index 3edfba8..0a9a5c4 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dsi_pll.c
+++ b/drivers/gpu/drm/i915/intel_dsi_pll.c
@@ -489,8 +489,10 @@ static void bxt_enable_dsi_pll(struct intel_encoder *encoder,
        POSTING_READ(BXT_DSI_PLL_CTL);
 
        /* Program TX, RX, Dphy clocks */
-       for_each_dsi_port(port, intel_dsi->ports)
-               bxt_dsi_program_clocks(encoder->base.dev, port, config);
+       if (IS_BROXTON(dev_priv)) {
+               for_each_dsi_port(port, intel_dsi->ports)
+                       bxt_dsi_program_clocks(encoder->base.dev, port, config);
+       }
 
        /* Enable DSI PLL */
        val = I915_READ(BXT_DSI_PLL_ENABLE);
@@ -554,19 +556,22 @@ void intel_disable_dsi_pll(struct intel_encoder *encoder)
                bxt_disable_dsi_pll(encoder);
 }
 
-static void bxt_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
+static void gen9lp_dsi_reset_clocks(struct intel_encoder *encoder,
+                                   enum port port)
 {
        u32 tmp;
        struct drm_device *dev = encoder->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
 
        /* Clear old configurations */
-       tmp = I915_READ(BXT_MIPI_CLOCK_CTL);
-       tmp &= ~(BXT_MIPI_TX_ESCLK_FIXDIV_MASK(port));
-       tmp &= ~(BXT_MIPI_RX_ESCLK_UPPER_FIXDIV_MASK(port));
-       tmp &= ~(BXT_MIPI_8X_BY3_DIVIDER_MASK(port));
-       tmp &= ~(BXT_MIPI_RX_ESCLK_LOWER_FIXDIV_MASK(port));
-       I915_WRITE(BXT_MIPI_CLOCK_CTL, tmp);
+       if (IS_BROXTON(dev_priv)) {
+               tmp = I915_READ(BXT_MIPI_CLOCK_CTL);
+               tmp &= ~(BXT_MIPI_TX_ESCLK_FIXDIV_MASK(port));
+               tmp &= ~(BXT_MIPI_RX_ESCLK_UPPER_FIXDIV_MASK(port));
+               tmp &= ~(BXT_MIPI_8X_BY3_DIVIDER_MASK(port));
+               tmp &= ~(BXT_MIPI_RX_ESCLK_LOWER_FIXDIV_MASK(port));
+               I915_WRITE(BXT_MIPI_CLOCK_CTL, tmp);
+       }
        I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
 }
 
@@ -575,7 +580,7 @@ void intel_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 
        if (IS_GEN9_LP(dev_priv))
-               bxt_dsi_reset_clocks(encoder, port);
+               gen9lp_dsi_reset_clocks(encoder, port);
        else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
                vlv_dsi_reset_clocks(encoder, port);
 }