On Thu, 04 Dec 2014, Gaurav K Singh <gaurav.k.singh@xxxxxxxxx> wrote:
> 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@xxxxxxxxx>
> Signed-off-by: Shobhit Kumar <shobhit.kumar@xxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dsi.c | 43 ++++++++++++++++++++++++++++----------
> 1 file changed, 32 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
> index 259cb4a..693736b 100644
> --- a/drivers/gpu/drm/i915/intel_dsi.c
> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> @@ -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);
> }
>
> --
> 1.7.9.5
>
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Jani Nikula, Intel Open Source Technology Center
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