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drm/i915/dsc: clarify DSC support for pipe A on ICL 

The check for cpu_transcoder != TRANSCODER_A is more magic than
necessary, and potentially misleading. Before TGL, DSC is supported on
pipe A if, and only if, it's used with eDP or DSI transcoders. No
functional changes.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f00e9d55ce20b256177222588780c660aa587cc3.1576081155.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2019-12-11 18:23:47 +02:00
parent 0314da782d
commit 4cb48c447e
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/i915/display/intel_vdsc.c
View File

@ -337,7 +337,10 @@ static const struct rc_parameters *get_rc_params(u16 compressed_bpp,
bool intel_dsc_source_support(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
const struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
enum pipe pipe = crtc->pipe;
if (!INTEL_INFO(i915)->display.has_dsc)
return false;
@ -347,7 +350,10 @@ bool intel_dsc_source_support(struct intel_encoder *encoder,
return true;
if (INTEL_GEN(i915) >= 10 &&
crtc_state->cpu_transcoder != TRANSCODER_A)
(pipe != PIPE_A ||
(cpu_transcoder == TRANSCODER_EDP ||
cpu_transcoder == TRANSCODER_DSI_0 ||
cpu_transcoder == TRANSCODER_DSI_1)))
return true;
return false;