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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4912-drm-amd-display-dcc-always-on-for-bw-calculations-on.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.14.71/4912-drm-amd-display-dcc-always-on-for-bw-calculations-on.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4912-drm-amd-display-dcc-always-on-for-bw-calculations-on.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4912-drm-amd-display-dcc-always-on-for-bw-calculations-on.patch
new file mode 100644
index 00000000..3cc8f85b
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4912-drm-amd-display-dcc-always-on-for-bw-calculations-on.patch
@@ -0,0 +1,47 @@
+From 54a1fef4af129f946eea051c42e25d67a717fb65 Mon Sep 17 00:00:00 2001
+From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
+Date: Wed, 13 Jun 2018 13:58:14 -0400
+Subject: [PATCH 4912/5725] drm/amd/display: dcc always on for bw calculations
+ on raven
+
+Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
+Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 19 ++++++++++++++++++-
+ 1 file changed, 18 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+index e44b8d3..080f777 100644
+--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
++++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c
+@@ -250,7 +250,24 @@ static void pipe_ctx_to_e2e_pipe_params (
+ else if (pipe->bottom_pipe != NULL && pipe->bottom_pipe->plane_state == pipe->plane_state)
+ input->src.is_hsplit = true;
+
+- input->src.dcc = pipe->plane_state->dcc.enable;
++ if (pipe->plane_res.dpp->ctx->dc->debug.optimized_watermark) {
++ /*
++ * this method requires us to always re-calculate watermark when dcc change
++ * between flip.
++ */
++ input->src.dcc = pipe->plane_state->dcc.enable ? 1 : 0;
++ } else {
++ /*
++ * allow us to disable dcc on the fly without re-calculating WM
++ *
++ * extra overhead for DCC is quite small. for 1080p WM without
++ * DCC is only 0.417us lower (urgent goes from 6.979us to 6.562us)
++ */
++ unsigned int bpe;
++
++ input->src.dcc = pipe->plane_res.dpp->ctx->dc->res_pool->hubbub->funcs->
++ dcc_support_pixel_format(pipe->plane_state->format, &bpe) ? 1 : 0;
++ }
+ input->src.dcc_rate = 1;
+ input->src.meta_pitch = pipe->plane_state->dcc.grph.meta_pitch;
+ input->src.source_scan = dm_horz;
+--
+2.7.4
+