drm/i915: Add more dev ops for MIPI sub encoder

Some panels require one time programming if they do not contain their
own eeprom for basic register initialization. The sequence is

Panel Reset --> Send OTP --> Enable Pixel Stream --> Enable the panel

v2: Based on review comments from Jani and Ville
    - Updated the commit message with more details
    - Move the new parameters out of this patch

Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 7b9b350..42ed28a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -147,6 +147,9 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
 
        DRM_DEBUG_KMS("\n");
 
+       if (intel_dsi->dev.dev_ops->panel_reset)
+               intel_dsi->dev.dev_ops->panel_reset(&intel_dsi->dev);
+
        temp = I915_READ(MIPI_DEVICE_READY(pipe));
        if ((temp & DEVICE_READY) == 0) {
                temp &= ~ULPS_STATE_MASK;
@@ -162,6 +165,9 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
                I915_WRITE(MIPI_DEVICE_READY(pipe), temp);
        }
 
+       if (intel_dsi->dev.dev_ops->send_otp_cmds)
+               intel_dsi->dev.dev_ops->send_otp_cmds(&intel_dsi->dev);
+
        if (is_cmd_mode(intel_dsi))
                I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
 
@@ -176,7 +182,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
                POSTING_READ(MIPI_PORT_CTRL(pipe));
        }
 
-       intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
+       if (intel_dsi->dev.dev_ops->enable)
+               intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
 }
 
 static void intel_dsi_disable(struct intel_encoder *encoder)

diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
index c7765f3..14509d6 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dsi.h
+++ b/drivers/gpu/drm/i915/intel_dsi.h
@@ -39,6 +39,11 @@ struct intel_dsi_device {
 struct intel_dsi_dev_ops {
        bool (*init)(struct intel_dsi_device *dsi);
 
+       void (*panel_reset)(struct intel_dsi_device *dsi);
+
+       /* one time programmable commands if needed */
+       void (*send_otp_cmds)(struct intel_dsi_device *dsi);
+
        /* This callback must be able to assume DSI commands can be sent */
        void (*enable)(struct intel_dsi_device *dsi);