[Intel-gfx] [GLK MIPI DSI V4 3/8] drm/i915/glk: Add MIPIIO Enable/disable sequence
Madhav Chauhan
madhav.chauhan at intel.com
Tue Feb 7 12:43:07 UTC 2017
From: Deepak M <m.deepak at intel.com>
v2: Addressed Jani's Review comments(renamed bit field macros)
v3: Jani's Review comment for aligning code to platforms and added
wrapper functions.
v4: Corrected enable/disable seuqence as per BSPEC
Signed-off-by: Deepak M <m.deepak at intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
---
drivers/gpu/drm/i915/intel_dsi.c | 206 ++++++++++++++++++++++++++++++++++++---
1 file changed, 195 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index be81283..0def214 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -357,6 +357,109 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
return true;
}
+static void glk_dsi_device_ready(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ enum port port;
+ u32 tmp, val;
+
+ /* Set the MIPI mode
+ * If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting.
+ * Power ON MIPI IO first and then write into IO reset and LP wake bits
+ */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ tmp = I915_READ(MIPI_CTRL(port));
+ I915_WRITE(MIPI_CTRL(port), tmp | GLK_MIPIIO_ENABLE);
+ }
+
+ /* Put the IO into reset */
+ tmp = I915_READ(MIPI_CTRL(PORT_A));
+ tmp &= ~GLK_MIPIIO_RESET_RELEASED;
+ I915_WRITE(MIPI_CTRL(PORT_A), tmp);
+
+ /* Program LP Wake */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ tmp = I915_READ(MIPI_CTRL(port));
+ tmp |= GLK_LP_WAKE;
+ I915_WRITE(MIPI_CTRL(port), tmp);
+ }
+
+ /* Wait for Pwr ACK */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED,
+ GLK_MIPIIO_PORT_POWERED, 20))
+ DRM_ERROR("Power ACK not received\n");
+ }
+
+ /* Wait for MIPI PHY status bit to set */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port), GLK_MIPIIO_PORT_POWERED,
+ GLK_MIPIIO_PORT_POWERED, 20))
+ DRM_ERROR("PHY is not ON\n");
+ }
+
+ /* Get IO out of reset */
+ tmp = I915_READ(MIPI_CTRL(PORT_A));
+ I915_WRITE(MIPI_CTRL(PORT_A), tmp | GLK_MIPIIO_RESET_RELEASED);
+
+ /* Get IO out of Low power state*/
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY)) {
+ val = I915_READ(MIPI_DEVICE_READY(port));
+ val &= ~ULPS_STATE_MASK;
+ val |= DEVICE_READY;
+ I915_WRITE(MIPI_DEVICE_READY(port), val);
+ usleep_range(10, 15);
+ }
+
+ /* Enter ULPS */
+ val = I915_READ(MIPI_DEVICE_READY(port));
+ val &= ~ULPS_STATE_MASK;
+ val |= (ULPS_STATE_ENTER | DEVICE_READY);
+ I915_WRITE(MIPI_DEVICE_READY(port), val);
+
+ /* Wait for ULPS Not active */
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE,
+ GLK_ULPS_NOT_ACTIVE, 20))
+
+ /* Exit ULPS */
+ val = I915_READ(MIPI_DEVICE_READY(port));
+ val &= ~ULPS_STATE_MASK;
+ val |= (ULPS_STATE_EXIT | DEVICE_READY);
+ I915_WRITE(MIPI_DEVICE_READY(port), val);
+
+ /* Enter Normal Mode */
+ val = I915_READ(MIPI_DEVICE_READY(port));
+ val &= ~ULPS_STATE_MASK;
+ val |= (ULPS_STATE_NORMAL_OPERATION | DEVICE_READY);
+ I915_WRITE(MIPI_DEVICE_READY(port), val);
+
+ tmp = I915_READ(MIPI_CTRL(port));
+ tmp &= ~GLK_LP_WAKE;
+ I915_WRITE(MIPI_CTRL(port), tmp);
+ }
+
+ /* Wait for Stop state */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port), GLK_DATA_LANE_STOP_STATE,
+ GLK_DATA_LANE_STOP_STATE, 20))
+ DRM_ERROR("Date lane not in STOP state\n");
+ }
+
+ /* Wait for AFE LATCH */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ BXT_MIPI_PORT_CTRL(port), AFE_LATCHOUT,
+ AFE_LATCHOUT, 20))
+ DRM_ERROR("D-PHY not entering LP-11 state\n");
+ }
+}
+
static void bxt_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
@@ -442,8 +545,10 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder)
if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
vlv_dsi_device_ready(encoder);
- else if (IS_GEN9_LP(dev_priv))
+ else if (IS_BROXTON(dev_priv))
bxt_dsi_device_ready(encoder);
+ else if (IS_GEMINILAKE(dev_priv))
+ glk_dsi_device_ready(encoder);
}
static void intel_dsi_port_enable(struct intel_encoder *encoder)
@@ -637,18 +742,20 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
msleep(2);
}
- for_each_dsi_port(port, intel_dsi->ports) {
- /* Panel commands can be sent when clock is in LP11 */
- I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
+ if (!IS_GEMINILAKE(dev_priv)) {
+ for_each_dsi_port(port, intel_dsi->ports) {
+ /* Panel commands can be sent when clock is in LP11 */
+ I915_WRITE(MIPI_DEVICE_READY(port), 0x0);
- intel_dsi_reset_clocks(encoder, port);
- I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
+ intel_dsi_reset_clocks(encoder, port);
+ I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP);
- temp = I915_READ(MIPI_DSI_FUNC_PRG(port));
- temp &= ~VID_MODE_FORMAT_MASK;
- I915_WRITE(MIPI_DSI_FUNC_PRG(port), temp);
+ temp = I915_READ(MIPI_DSI_FUNC_PRG(port));
+ temp &= ~VID_MODE_FORMAT_MASK;
+ I915_WRITE(MIPI_DSI_FUNC_PRG(port), temp);
- I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
+ I915_WRITE(MIPI_DEVICE_READY(port), 0x1);
+ }
}
/* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed */
@@ -658,7 +765,73 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
wait_for_dsi_fifo_empty(intel_dsi, port);
}
-static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
+static void glk_dsi_enter_low_power_mode(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ enum port port;
+ u32 val;
+
+ /* Enter ULPS */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ val = I915_READ(MIPI_DEVICE_READY(port));
+ val &= ~ULPS_STATE_MASK;
+ val |= (ULPS_STATE_ENTER | DEVICE_READY);
+ I915_WRITE(MIPI_DEVICE_READY(port), val);
+ }
+
+ /* Wait for MIPI PHY status bit to unset */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port),
+ GLK_PHY_STATUS_PORT_READY, 0, 20))
+ DRM_ERROR("PHY is not turning OFF\n");
+ }
+
+ /* Wait for Pwr ACK bit to unset */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port),
+ GLK_MIPIIO_PORT_POWERED, 0, 20))
+ DRM_ERROR("MIPI IO Port is not powergated\n");
+ }
+}
+
+static void glk_dsi_disable_mipi_io(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ enum port port;
+ u32 tmp;
+
+ /* Put the IO into reset */
+ tmp = I915_READ(MIPI_CTRL(PORT_A));
+ tmp &= ~GLK_MIPIIO_RESET_RELEASED;
+ I915_WRITE(MIPI_CTRL(PORT_A), tmp);
+
+ /* Wait for MIPI PHY status bit to unset */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ if (intel_wait_for_register(dev_priv,
+ MIPI_CTRL(port),
+ GLK_PHY_STATUS_PORT_READY, 0, 20))
+ DRM_ERROR("PHY is not turning OFF\n");
+ }
+
+ /* Clear MIPI mode */
+ for_each_dsi_port(port, intel_dsi->ports) {
+ tmp = I915_READ(MIPI_CTRL(port));
+ tmp &= ~GLK_MIPIIO_ENABLE;
+ I915_WRITE(MIPI_CTRL(port), tmp);
+ }
+}
+
+static void glk_dsi_clear_device_ready(struct intel_encoder *encoder)
+{
+ glk_dsi_enter_low_power_mode(encoder);
+ glk_dsi_disable_mipi_io(encoder);
+}
+
+static void vlv_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
@@ -701,6 +874,17 @@ static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
}
}
+static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+ if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv) ||
+ IS_BROXTON(dev_priv))
+ vlv_dsi_clear_device_ready(encoder);
+ else if (IS_GEMINILAKE(dev_priv))
+ glk_dsi_clear_device_ready(encoder);
+}
+
static void intel_dsi_post_disable(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
--
1.9.1
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