UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915: New functions added for enabling & disabling MIPI Port Ctrl reg 

This patch is in preparation for the DSI dual link
port enable and disable related changes.

Signed-off-by: Gaurav K Singh <gaurav.k.singh@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>
This commit is contained in:
Gaurav K Singh 2014-12-04 10:58:47 +05:30 committed by Daniel Vetter
parent 2fcffe195e
commit 5505a24490
1 changed files with 32 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/gpu/drm/i915/intel_dsi.c
View File

@ -102,6 +102,36 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
return true;
}
static void intel_dsi_port_enable(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 port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
u32 temp;
/* assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(port)) & ~LANE_CONFIGURATION_MASK;
temp = temp | intel_dsi->port_bits;
I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(port));
}
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);
enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
u32 temp;
/* de-assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(port));
I915_WRITE(MIPI_PORT_CTRL(port), temp & ~DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(port));
}
static void intel_dsi_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
@ -141,7 +171,6 @@ static void intel_dsi_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 port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
u32 temp;
DRM_DEBUG_KMS("\n");
@ -157,11 +186,7 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
wait_for_dsi_fifo_empty(intel_dsi);
/* assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(port)) & ~LANE_CONFIGURATION_MASK;
temp = temp | intel_dsi->port_bits;
I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(port));
intel_dsi_port_enable(encoder);
}
}
@ -245,11 +270,7 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
if (is_vid_mode(intel_dsi)) {
wait_for_dsi_fifo_empty(intel_dsi);
/* de-assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(port));
I915_WRITE(MIPI_PORT_CTRL(port), temp & ~DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(port));
intel_dsi_port_disable(encoder);
msleep(2);
}