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drm/i915/icl: Disable DSI ports 

This patch disables both DSI ports by writing to
DDI_BUF_CTL registers as part of DSI encoder disable
sequence.

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/be9a7dc1ed89ad38679c67ff1c1552f0b4604494.1540900289.git.jani.nikula@intel.com
This commit is contained in:
Madhav Chauhan 2018-10-30 13:56:19 +02:00 committed by Jani Nikula
parent 9c83ab1bb3
commit 019cec36f3
1 changed files with 23 additions and 0 deletions
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23
drivers/gpu/drm/i915/icl_dsi.c
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@ -853,6 +853,26 @@ static void gen11_dsi_deconfigure_trancoder(struct intel_encoder *encoder)
}
}
static void gen11_dsi_disable_port(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);
u32 tmp;
enum port port;
for_each_dsi_port(port, intel_dsi->ports) {
tmp = I915_READ(DDI_BUF_CTL(port));
tmp &= ~DDI_BUF_CTL_ENABLE;
I915_WRITE(DDI_BUF_CTL(port), tmp);
if (wait_for_us((I915_READ(DDI_BUF_CTL(port)) &
DDI_BUF_IS_IDLE),
8))
DRM_ERROR("DDI port:%c buffer not idle\n",
port_name(port));
}
}
static void __attribute__((unused)) gen11_dsi_disable(
struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
@ -872,4 +892,7 @@ static void __attribute__((unused)) gen11_dsi_disable(
/* step2h,i,j: deconfig trancoder */
gen11_dsi_deconfigure_trancoder(encoder);
/* step3: disable port */
gen11_dsi_disable_port(encoder);
}