On Thu, 2016-09-01 at 15:08 -0700, Manasi Navare wrote:
> While configuring the pipe during modeset, it should loop
> starting from max clock and max lane count reducing the
> lane count and clock in each iteration until the requested mode
> rate is less than or equal to available link BW.
>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dp.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> index dfdbe65..e094b25 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1552,11 +1552,10 @@ intel_dp_compute_config(struct intel_encoder
> *encoder,
> for (; bpp >= 6*3; bpp -= 2*3) {
> mode_rate = intel_dp_link_required(adjusted_mode-
> >crtc_clock,
> bpp);
> -
> - for (clock = min_clock; clock <= max_clock; clock++)
> {
> - for (lane_count = min_lane_count;
> - lane_count <= max_lane_count;
> - lane_count <<= 1) {
> + for (clock = max_clock; clock >= max_clock; clock--)
The clock should be higher than or equal to min_clock.
> {
> + for (lane_count = max_lane_count;
> + lane_count >= min_lane_count;
> + lane_count >>= 1) {
>
> link_clock = common_rates[clock];
> link_avail =
> intel_dp_max_data_rate(link_clock,
--
Mika Kahola - Intel OTC
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