system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-22 12:26:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

i915/dp/fec: Add fec_enable to the crtc state.

Browse source 
For DP 1.4 and above, Display Stream compression can be
enabled only if Forward Error Correctin can be performed.

Add a crtc state for FEC. Currently, the state
is determined by platform, DP and DSC being
enabled. Moving forward we can use the state
to have error correction on other scenarios too
if needed.

v2:
- Control compression_enable with the fec_enable
parameter in crtc state and with intel_dp_supports_fec()
(Ville)

- intel_dp_can_fec()/intel_dp_supports_fec()(manasi)

v3: Check for FEC support along with setting crtc state.

v4: add checks to intel_dp_source_supports_dsc.(manasi)
- Move intel_dp_supports_fec() closer to
intel_dp_supports_dsc() (Anusha)

v5: Move fec check to intel_dp_supports_dsc(Ville)

v6: Remove warning. rebase.

v7: change crtc state to include DP sink and fec capability
of source.(Manasi)

v8: Set fec_enable in crtc in intel_dp_compute_config().

v9 (From Manasi):
* Combine the !edp and !fec_support check
* Derive dev_priv from intel_dp directly

v10 (From Manasi):
* Rebase

Suggested-by: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: dri-devel@lists.freedesktop.org
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.comk>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181128202628.20238-14-manasi.d.navare@intel.com
This commit is contained in:
Anusha Srivatsa 2018-11-28 12:26:25 -08:00 committed by Manasi Navare
parent a24c62f94b
commit 240999cf33
2 changed files with 26 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
drivers/gpu/drm/i915/intel_dp.c
View file

@ -545,7 +545,7 @@ intel_dp_mode_valid(struct drm_connector *connector,
dsc_slice_count =
drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
true);
} else {
} else if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
dsc_max_output_bpp =
intel_dp_dsc_get_output_bpp(max_link_clock,
max_lanes,
@ -1710,14 +1710,26 @@ struct link_config_limits {
int min_bpp, max_bpp;
};
static bool intel_dp_source_supports_dsc(struct intel_dp *intel_dp,
static bool intel_dp_source_supports_fec(struct intel_dp *intel_dp,
const struct intel_crtc_state *pipe_config)
{
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
/* FIXME: FEC needed for external DP until then reject DSC on DP */
if (!intel_dp_is_edp(intel_dp))
return false;
return INTEL_GEN(dev_priv) >= 11 &&
pipe_config->cpu_transcoder != TRANSCODER_A;
}
static bool intel_dp_supports_fec(struct intel_dp *intel_dp,
const struct intel_crtc_state *pipe_config)
{
return intel_dp_source_supports_fec(intel_dp, pipe_config) &&
drm_dp_sink_supports_fec(intel_dp->fec_capable);
}
static bool intel_dp_source_supports_dsc(struct intel_dp *intel_dp,
const struct intel_crtc_state *pipe_config)
{
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
return INTEL_GEN(dev_priv) >= 10 &&
pipe_config->cpu_transcoder != TRANSCODER_A;
@ -1726,6 +1738,9 @@ static bool intel_dp_source_supports_dsc(struct intel_dp *intel_dp,
static bool intel_dp_supports_dsc(struct intel_dp *intel_dp,
const struct intel_crtc_state *pipe_config)
{
if (!intel_dp_is_edp(intel_dp) && !pipe_config->fec_enable)
return false;
return intel_dp_source_supports_dsc(intel_dp, pipe_config) &&
drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd);
}
@ -2129,6 +2144,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
return false;
pipe_config->fec_enable = !intel_dp_is_edp(intel_dp) &&
intel_dp_supports_fec(intel_dp, pipe_config);
if (!intel_dp_compute_link_config(encoder, pipe_config, conn_state))
return false;

3
drivers/gpu/drm/i915/intel_drv.h
View file

@ -951,6 +951,9 @@ struct intel_crtc_state {
u8 slice_count;
} dsc_params;
struct drm_dsc_config dp_dsc_cfg;
/* Forward Error correction State */
bool fec_enable;
};
struct intel_crtc {