On Wed, 30 May 2012 15:34:20 +0200, Daniel Vetter <daniel.vet...@ffwll.ch>
wrote:
> Instead of abusing into mode->clock, because we should touch that
> one at all. First prep step to constify the mode argument to the
> intel_dp_mode_fixup function.
>
> The next patch will stop us from modifying mode->clock.
>
> Signed-Off-by: Daniel Vetter <daniel.vet...@ffwll.ch>
> ---
> drivers/gpu/drm/i915/intel_display.c | 16 ++++++++--------
> drivers/gpu/drm/i915/intel_dp.c | 12 ++++++++++++
> drivers/gpu/drm/i915/intel_drv.h | 2 ++
> 3 files changed, 22 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c
> b/drivers/gpu/drm/i915/intel_display.c
> index 9147894..a5d06ed 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4431,16 +4431,8 @@ static int ironlake_crtc_mode_set(struct drm_crtc
> *crtc,
> /* CPU eDP doesn't require FDI link, so just set DP M/N
> according to current link config */
> if (is_cpu_edp) {
> - target_clock = mode->clock;
> intel_edp_link_config(edp_encoder, &lane, &link_bw);
> } else {
> - /* [e]DP over FDI requires target mode clock
> - instead of link clock */
> - if (is_dp)
> - target_clock = mode->clock;
> - else
> - target_clock = adjusted_mode->clock;
> -
> /* FDI is a binary signal running at ~2.7GHz, encoding
> * each output octet as 10 bits. The actual frequency
> * is stored as a divider into a 100MHz clock, and the
> @@ -4451,6 +4443,14 @@ static int ironlake_crtc_mode_set(struct drm_crtc
> *crtc,
> link_bw = intel_fdi_link_freq(dev) * MHz(100)/KHz(1)/10;
> }
>
> + /* [e]DP over FDI requires target mode clock instead of link clock. */
> + if (edp_encoder)
> + target_clock = intel_edp_target_clock(edp_encoder, mode);
Given the edp_encoder, we know that adjusted_mode contains either the
fixed_panel clock or the original clock depending on whether a fixed
mode was found. So the layering violation could be dropped here in
favour of target_clock = adjusted_mode->clok.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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