[Intel-gfx] [PATCH v2 1/7] drm/i915: Add more dev ops for MIPI sub encoder

[Shobhit Kumar]

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 at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_dsi.c |    9 ++++++++-
 drivers/gpu/drm/i915/intel_dsi.h |    5 +++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index d257b09..61267e2 100644
--- 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
--- 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);
 
-- 
1.7.9.5