From 0ad0c679913ce77b83f9f313fdaae60ff6f3b9d7 Mon Sep 17 00:00:00 2001
From: Uma Shankar <uma.shankar@intel.com>
Date: Tue, 7 Dec 2021 12:41:33 +0530
Subject: drm/i915/xelpd: Enable Pipe color support for D13 platform
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: e83c18cffaedb1cd5da935b06d49308f92ea50cb
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Enable pipe color support for Display 13 platforms. Currently
limit to just 10bit gamma and later extend it for logarithmic
gamma, once the new UAPI is agreed by community and implemented
by a userspace consumer.
v2: Updated dev_priv to i915 (Ville)
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211207071135.3660332-2-uma.shankar@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/display/intel_color.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 840f13b75492..42fe549ef6fe 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1574,6 +1574,8 @@ static int glk_color_check(struct intel_crtc_state *crtc_state)
static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc->base.dev);
u32 gamma_mode = 0;
if (crtc_state->hw.degamma_lut)
@@ -1586,6 +1588,13 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
if (!crtc_state->hw.gamma_lut ||
crtc_state_is_legacy_gamma(crtc_state))
gamma_mode |= GAMMA_MODE_MODE_8BIT;
+ /*
+ * Enable 10bit gamma for D13
+ * ToDo: Extend to Logarithmic Gamma once the new UAPI
+ * is acccepted and implemented by a userspace consumer
+ */
+ else if (DISPLAY_VER(i915) >= 13)
+ gamma_mode |= GAMMA_MODE_MODE_10BIT;
else
gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
--
2.38.1