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From a1261bed085d28247ce6977e0f94b3f7a00c3440 Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Wed, 21 Aug 2019 11:27:13 -0400
Subject: [PATCH 3487/4256] drm/amd/display: Calculate bpc based on
max_requested_bpc
[Why]
The only place where state->max_bpc is updated on the connector is
at the start of atomic check during drm_atomic_connector_check. It
isn't updated when adding the connectors to the atomic state after
the fact. It also doesn't necessarily reflect the right value when
called in amdgpu during mode validation outside of atomic check.
This can cause the wrong bpc to be used even if the max_requested_bpc
is the correct value.
[How]
Don't rely on state->max_bpc reflecting the real bpc value and just
do the min(...) based on display info bpc and max_requested_bpc.
Fixes: 01933ba42d3d ("drm/amd/display: Use current connector state if NULL when checking bpc")
Change-Id: Ic8ff6beaf00dd6c2b9dd82bc503e5c7ce281ed1b
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
index cc415ecc2c1a..48fd259cd33f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.h
@@ -58,6 +58,7 @@ const char *const *amdgpu_dm_crtc_get_crc_sources(struct drm_crtc *crtc,
size_t *count);
void amdgpu_dm_crtc_handle_crc_irq(struct drm_crtc *crtc);
#else
+#define amdgpu_dm_crtc_configure_crc_source NULL
#define amdgpu_dm_crtc_set_crc_source NULL
#define amdgpu_dm_crtc_verify_crc_source NULL
#define amdgpu_dm_crtc_get_crc_sources NULL
--
2.17.1
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