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drm/i915: Update bits per component for display info

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DisplayPort branch device may define max supported bits per
component. Update display info based on this value if bpc
is defined.

v2: cleanup to match the drm_dp_helper.c patches introduced
    earlier in this series
v3: Fill bpc for connector's display info in separate
    drm_dp_helper function (Daniel)
v4: remove updating bpc for display info as it may be overridden
    when parsing EDID. Instead, check bpc for DP branch device
    during compute_config
v5: Indentation fixes (Jim Bride)

Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Jim Bride <jim.bride@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1473419458-17080-11-git-send-email-mika.kahola@intel.com
This commit is contained in:
Mika Kahola 2016-09-09 14:10:56 +03:00 committed by Jani Nikula
parent 70ec064516
commit f9bb705e65
1 changed files with 15 additions and 1 deletions
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16
drivers/gpu/drm/i915/intel_dp.c
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@ -1524,6 +1524,20 @@ void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
}
}
int intel_dp_compute_bpp(struct intel_dp *intel_dp,
struct intel_crtc_state *pipe_config)
{
int bpp, bpc;
bpp = pipe_config->pipe_bpp;
bpc = drm_dp_downstream_max_bpc(intel_dp->dpcd, intel_dp->downstream_ports);
if (bpc > 0)
bpp = min(bpp, 3*bpc);
return bpp;
}
bool
intel_dp_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
@ -1590,7 +1604,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
/* Walk through all bpp values. Luckily they're all nicely spaced with 2
* bpc in between. */
bpp = pipe_config->pipe_bpp;
bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
if (is_edp(intel_dp)) {
/* Get bpp from vbt only for panels that dont have bpp in edid */