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From: "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
To: Liviu Dudau <Liviu.Dudau@arm.com>,
	"airlied@linux.ie" <airlied@linux.ie>,
	Brian Starkey <Brian.Starkey@arm.com>,
	"maarten.lankhorst@linux.intel.com"
	<maarten.lankhorst@linux.intel.com>,
	"sean@poorly.run" <sean@poorly.run>,
	"imirkin@alum.mit.edu" <imirkin@alum.mit.edu>
Cc: nd <nd@arm.com>, Ayan Halder <Ayan.Halder@arm.com>,
	"Oscar Zhang (Arm Technology China)" <Oscar.Zhang@arm.com>,
	"Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@arm.com>,
	Mihail Atanassov <Mihail.Atanassov@arm.com>,
	"Jonathan Chai (Arm Technology China)" <Jonathan.Chai@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"Julien Yin (Arm Technology China)" <Julien.Yin@arm.com>,
	"Channing Chen (Arm Technology China)" <Channing.Chen@arm.com>,
	"james qian wang (Arm Technology China)"
	<james.qian.wang@arm.com>,
	"Yiqi Kang (Arm Technology China)" <Yiqi.Kang@arm.com>,
	"Thomas Sun (Arm Technology China)" <thomas.Sun@arm.com>,
	"Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>,
	Ben Davis <Ben.Davis@arm.com>
Subject: [PATCH v4 3/4] drm/komeda: Add drm_ctm_to_coeffs()
Date: Tue, 15 Oct 2019 02:11:01 +0000	[thread overview]
Message-ID: <20191015021016.327-4-james.qian.wang@arm.com> (raw)
In-Reply-To: <20191015021016.327-1-james.qian.wang@arm.com>

This function is for converting drm_color_ctm matrix to komeda hardware
required required Q2.12 2's complement CSC matrix.

v2:
  Move the fixpoint conversion function s31_32_to_q2_12() to drm core
  as a shared helper.

Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
---
 .../gpu/drm/arm/display/komeda/komeda_color_mgmt.c | 14 ++++++++++++++
 .../gpu/drm/arm/display/komeda/komeda_color_mgmt.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
index c180ce70c26c..ad668accbdf4 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
@@ -117,3 +117,17 @@ void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs)
 {
 	drm_lut_to_coeffs(lut_blob, coeffs, sector_tbl, ARRAY_SIZE(sector_tbl));
 }
+
+void drm_ctm_to_coeffs(struct drm_property_blob *ctm_blob, u32 *coeffs)
+{
+	struct drm_color_ctm *ctm;
+	u32 i;
+
+	if (!ctm_blob)
+		return;
+
+	ctm = ctm_blob->data;
+
+	for (i = 0; i < KOMEDA_N_CTM_COEFFS; i++)
+		coeffs[i] = drm_color_ctm_s31_32_to_qm_n(ctm->matrix[i], 2, 12);
+}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
index 08ab69281648..2f4668466112 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
@@ -18,6 +18,7 @@
 #define KOMEDA_N_CTM_COEFFS		9
 
 void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs);
+void drm_ctm_to_coeffs(struct drm_property_blob *ctm_blob, u32 *coeffs);
 
 const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_range);
 
-- 
2.20.1

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  parent reply	other threads:[~2019-10-15  2:11 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-15  2:10 [PATCH v2 0/4] drm/komeda: Enable CRTC color-mgmt james qian wang (Arm Technology China)
2019-10-15  2:10 ` [PATCH v4 1/4] drm: Add a new helper drm_color_ctm_s31_32_to_qm_n() james qian wang (Arm Technology China)
2019-10-15  2:10 ` [PATCH v4 2/4] drm/komeda: Add drm_lut_to_fgamma_coeffs() james qian wang (Arm Technology China)
2019-10-15  8:29   ` Brian Starkey
2019-10-15  8:55     ` james qian wang (Arm Technology China)
2019-10-15  2:11 ` james qian wang (Arm Technology China) [this message]
2019-10-15  2:11 ` [PATCH v4 4/4] drm/komeda: Adds gamma and color-transform support for DOU-IPS james qian wang (Arm Technology China)

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