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-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4710-drm-amd-display-Change-HDR_MULT-check.patch47
1 files changed, 47 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4710-drm-amd-display-Change-HDR_MULT-check.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4710-drm-amd-display-Change-HDR_MULT-check.patch
new file mode 100644
index 00000000..9d9cfc50
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4710-drm-amd-display-Change-HDR_MULT-check.patch
@@ -0,0 +1,47 @@
+From d0bde5aa157cf73ba730a8c950acbeface6e6318 Mon Sep 17 00:00:00 2001
+From: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
+Date: Fri, 15 Nov 2019 10:00:46 -0500
+Subject: [PATCH 4710/4736] drm/amd/display: Change HDR_MULT check
+
+[Why]
+Currently we require HDR_MULT >= 1.0
+There are scenarios where we need < 1.0
+
+[How]
+Only guard against 0 - it will black-screen image.
+It is up to higher-level logic to decide what HDR_MULT
+values are allowed in each particular case.
+
+Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
+Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
+Acked-by: Leo Li <sunpeng.li@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 6 +-----
+ 1 file changed, 1 insertion(+), 5 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+index c085a561b24c..35599d4ba6f6 100644
+--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+@@ -2392,17 +2392,13 @@ void dcn10_set_hdr_multiplier(struct pipe_ctx *pipe_ctx)
+ struct fixed31_32 multiplier = pipe_ctx->plane_state->hdr_mult;
+ uint32_t hw_mult = 0x1f000; // 1.0 default multiplier
+ struct custom_float_format fmt;
+- bool mult_negative; // True if fixed31_32 sign bit indicates negative value
+- uint32_t mult_int; // int component of fixed31_32
+
+ fmt.exponenta_bits = 6;
+ fmt.mantissa_bits = 12;
+ fmt.sign = true;
+
+- mult_negative = multiplier.value >> 63 != 0;
+- mult_int = multiplier.value >> 32;
+
+- if (mult_int && !mult_negative) // Check if greater than 1
++ if (!dc_fixpt_eq(multiplier, dc_fixpt_from_int(0))) // check != 0
+ convert_to_custom_float_format(multiplier, &fmt, &hw_mult);
+
+ pipe_ctx->plane_res.dpp->funcs->dpp_set_hdr_multiplier(
+--
+2.17.1
+