Commit 6fa2d197 authored by Ander Conselvan de Oliveira's avatar Ander Conselvan de Oliveira Committed by Jani Nikula

i915: Set ddi_pll_sel in DP MST path

The DP MST encoder config function never sets ddi_pll_sel, even though
its value is programmed in its ->pre_enable() hook. That used to work
because a new pipe_config was kzalloc'ed at every modeset, and the value
of zero selects the highest clock for the PLL. Starting with the commit
below, the value of ddi_pll_sel is preserved through modesets, and since
the correct value wasn't properly setup by the MST code, it could lead
to warnings and blank screens.

commit 8504c74c
Author: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Date:   Fri May 15 11:51:50 2015 +0300

    drm/i915: Preserve ddi_pll_sel when allocating new pipe_config

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91628
Cc: stable@vger.kernel.org # 7e6313a2 drm/i915: Don't use link_bw for PLL setup
Cc: stable@vger.kernel.org
Cc: Timo Aaltonen <tjaalton@ubuntu.com>
Cc: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 7e6313a2
...@@ -1175,7 +1175,7 @@ skl_edp_set_pll_config(struct intel_crtc_state *pipe_config) ...@@ -1175,7 +1175,7 @@ skl_edp_set_pll_config(struct intel_crtc_state *pipe_config)
pipe_config->dpll_hw_state.ctrl1 = ctrl1; pipe_config->dpll_hw_state.ctrl1 = ctrl1;
} }
static void void
hsw_dp_set_ddi_pll_sel(struct intel_crtc_state *pipe_config) hsw_dp_set_ddi_pll_sel(struct intel_crtc_state *pipe_config)
{ {
memset(&pipe_config->dpll_hw_state, 0, memset(&pipe_config->dpll_hw_state, 0,
......
...@@ -33,6 +33,7 @@ ...@@ -33,6 +33,7 @@
static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config) struct intel_crtc_state *pipe_config)
{ {
struct drm_device *dev = encoder->base.dev;
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base); struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary; struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp; struct intel_dp *intel_dp = &intel_dig_port->dp;
...@@ -97,6 +98,10 @@ static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, ...@@ -97,6 +98,10 @@ static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
&pipe_config->dp_m_n); &pipe_config->dp_m_n);
pipe_config->dp_m_n.tu = slots; pipe_config->dp_m_n.tu = slots;
if (IS_HASWELL(dev) || IS_BROADWELL(dev))
hsw_dp_set_ddi_pll_sel(pipe_config);
return true; return true;
} }
......
...@@ -1185,6 +1185,7 @@ void intel_edp_drrs_disable(struct intel_dp *intel_dp); ...@@ -1185,6 +1185,7 @@ void intel_edp_drrs_disable(struct intel_dp *intel_dp);
void intel_edp_drrs_invalidate(struct drm_device *dev, void intel_edp_drrs_invalidate(struct drm_device *dev,
unsigned frontbuffer_bits); unsigned frontbuffer_bits);
void intel_edp_drrs_flush(struct drm_device *dev, unsigned frontbuffer_bits); void intel_edp_drrs_flush(struct drm_device *dev, unsigned frontbuffer_bits);
void hsw_dp_set_ddi_pll_sel(struct intel_crtc_state *pipe_config);
/* intel_dp_mst.c */ /* intel_dp_mst.c */
int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id); int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id);
......
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