Signed-off-by: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>
Signed-off-by: Shobhit Kumar <shobhit.kumar@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_dsi.c | 53 ++++++++++++++++++++++------
drivers/gpu/drm/i915/intel_dsi.h | 1 +
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 1 +
4 files changed, 45 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index ad8179b..922d807 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6215,6 +6215,7 @@ enum punit_power_well {
#define DPI_ENABLE (1 << 31) /* A + B */
#define MIPIA_MIPI4DPHY_DELAY_COUNT_SHIFT 27
#define MIPIA_MIPI4DPHY_DELAY_COUNT_MASK (0xf << 27)
+#define DUAL_LINK_MODE_SHIFT 26
#define DUAL_LINK_MODE_MASK (1 << 26)
#define DUAL_LINK_MODE_FRONT_BACK (0 << 26)
#define DUAL_LINK_MODE_PIXEL_ALTERNATIVE (1 << 26)
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index e456ca9..3b1890e 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -109,13 +109,31 @@ static void intel_dsi_port_enable(struct intel_encoder *encoder)
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum pipe pipe = intel_crtc->pipe;
- u32 temp;
-
- /* assert ip_tg_enable signal */
- temp = I915_READ(MIPI_PORT_CTRL(pipe)) & ~LANE_CONFIGURATION_MASK;
- temp = temp | intel_dsi->port_bits;
- I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
- POSTING_READ(MIPI_PORT_CTRL(pipe));
+ u32 temp, port_control = 0;
+
+ if (intel_dsi->dual_link) {
+ port_control = (intel_dsi->dual_link - 1)
+ << DUAL_LINK_MODE_SHIFT;
+ port_control |= pipe ? LANE_CONFIGURATION_DUAL_LINK_B :
+ LANE_CONFIGURATION_DUAL_LINK_A;
+ /*For Port A */
+ temp = I915_READ(MIPI_PORT_CTRL(0));
+ temp = temp | port_control;
+ I915_WRITE(MIPI_PORT_CTRL(0), temp | DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(0));
+
+ /* For Port C */
+ temp = I915_READ(MIPI_PORT_CTRL(1));
+ I915_WRITE(MIPI_PORT_CTRL(1), temp | DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(1));
+ } else {
+ /* assert ip_tg_enable signal */
+ temp = I915_READ(MIPI_PORT_CTRL(pipe)) &
+ ~LANE_CONFIGURATION_MASK;
+ temp = temp | intel_dsi->port_bits;
+ I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(pipe));
+ }
}
static void intel_dsi_port_disable(struct intel_encoder *encoder)
@@ -123,13 +141,26 @@ static void intel_dsi_port_disable(struct intel_encoder *encoder)
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
+ struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum pipe pipe = intel_crtc->pipe;
u32 temp;
- /* de-assert ip_tg_enable signal */
- temp = I915_READ(MIPI_PORT_CTRL(pipe));
- I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
- POSTING_READ(MIPI_PORT_CTRL(pipe));
+ if (intel_dsi->dual_link) {
+ /*For Port A */
+ temp = I915_READ(MIPI_PORT_CTRL(0));
+ I915_WRITE(MIPI_PORT_CTRL(0), temp & ~DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(0));
+
+ /* For Port C */
+ temp = I915_READ(MIPI_PORT_CTRL(1));
+ I915_WRITE(MIPI_PORT_CTRL(1), temp & ~DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(1));
+ } else {
+ /* de-assert ip_tg_enable signal */
+ temp = I915_READ(MIPI_PORT_CTRL(pipe));
+ I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
+ POSTING_READ(MIPI_PORT_CTRL(pipe));
+ }
}
static void intel_dsi_device_ready(struct intel_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
index 587e71f..950ab41 100644
--- a/drivers/gpu/drm/i915/intel_dsi.h
+++ b/drivers/gpu/drm/i915/intel_dsi.h
@@ -101,6 +101,7 @@ struct intel_dsi {
u8 clock_stop;
u8 escape_clk_div;
+ u8 dual_link;
u32 port_bits;
u32 bw_timer;
u32 dphy_reg;
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 051bfff..d424ebc 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -283,6 +283,7 @@ static bool generic_init(struct intel_dsi_device *dsi)
intel_dsi->lane_count = mipi_config->lane_cnt + 1;
intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;
intel_dsi->port = 0;
+ intel_dsi->dual_link = mipi_config->dual_link;
if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
bits_per_pixel = 18;
--
1.7.9.5
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