gpu: ipu-v3: Add Rec.709 limited range support to DP

Add YCbCr encoding and quantization range parameters to
ipu_dp_setup_channel() and configure the CSC DP matrix
accordingly.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c
index 544d8ea..9d8f1b6 100644 (file)
--- a/drivers/gpu/drm/imx/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3-plane.c
@@ -651,11 +651,14 @@ static void ipu_plane_atomic_update(struct drm_plane *plane,
        ics = ipu_drm_fourcc_to_colorspace(fb->format->format);
        switch (ipu_plane->dp_flow) {
        case IPU_DP_FLOW_SYNC_BG:
-               ipu_dp_setup_channel(ipu_plane->dp, ics, IPUV3_COLORSPACE_RGB);
+               ipu_dp_setup_channel(ipu_plane->dp, DRM_COLOR_YCBCR_BT601,
+                                    DRM_COLOR_YCBCR_LIMITED_RANGE, ics,
+                                    IPUV3_COLORSPACE_RGB);
                break;
        case IPU_DP_FLOW_SYNC_FG:
-               ipu_dp_setup_channel(ipu_plane->dp, ics,
-                                       IPUV3_COLORSPACE_UNKNOWN);
+               ipu_dp_setup_channel(ipu_plane->dp, DRM_COLOR_YCBCR_BT601,
+                                    DRM_COLOR_YCBCR_LIMITED_RANGE, ics,
+                                    IPUV3_COLORSPACE_UNKNOWN);
                break;
        }
 

diff --git a/drivers/gpu/ipu-v3/ipu-dp.c b/drivers/gpu/ipu-v3/ipu-dp.c
index 8f67e98..6a55820 100644 (file)
--- a/drivers/gpu/ipu-v3/ipu-dp.c
+++ b/drivers/gpu/ipu-v3/ipu-dp.c
@@ -10,6 +10,7 @@
 #include <linux/io.h>
 #include <linux/err.h>
 
+#include <drm/drm_color_mgmt.h>
 #include <video/imx-ipu-v3.h>
 #include "ipu-prv.h"
 
@@ -125,6 +126,8 @@ int ipu_dp_set_window_pos(struct ipu_dp *dp, u16 x_pos, u16 y_pos)
 EXPORT_SYMBOL_GPL(ipu_dp_set_window_pos);
 
 static void ipu_dp_csc_init(struct ipu_flow *flow,
+               enum drm_color_encoding ycbcr_enc,
+               enum drm_color_range range,
                enum ipu_color_space in,
                enum ipu_color_space out,
                u32 place)
@@ -148,7 +151,18 @@ static void ipu_dp_csc_init(struct ipu_flow *flow,
                                flow->base + DP_CSC_0);
                writel(0x200 | (2 << 14) | (0x200 << 16) | (2 << 30),
                                flow->base + DP_CSC_1);
+       } else if (ycbcr_enc == DRM_COLOR_YCBCR_BT709) {
+               /* Rec.709 limited range */
+               writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0);
+               writel(0x0e5 | (0x095 << 16), flow->base + DP_CSC_A_1);
+               writel(0x3e5 | (0x3bc << 16), flow->base + DP_CSC_A_2);
+               writel(0x095 | (0x10e << 16), flow->base + DP_CSC_A_3);
+               writel(0x000 | (0x3e10 << 16) | (1 << 30),
+                               flow->base + DP_CSC_0);
+               writel(0x09a | (1 << 14) | (0x3dbe << 16) | (1 << 30),
+                               flow->base + DP_CSC_1);
        } else {
+               /* BT.601 limited range */
                writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0);
                writel(0x0cc | (0x095 << 16), flow->base + DP_CSC_A_1);
                writel(0x3ce | (0x398 << 16), flow->base + DP_CSC_A_2);
@@ -165,6 +179,8 @@ static void ipu_dp_csc_init(struct ipu_flow *flow,
 }
 
 int ipu_dp_setup_channel(struct ipu_dp *dp,
+               enum drm_color_encoding ycbcr_enc,
+               enum drm_color_range range,
                enum ipu_color_space in,
                enum ipu_color_space out)
 {
@@ -183,7 +199,8 @@ int ipu_dp_setup_channel(struct ipu_dp *dp,
                 * foreground and background are of same colorspace, put
                 * colorspace converter after combining unit.
                 */
-               ipu_dp_csc_init(flow, flow->foreground.in_cs, flow->out_cs,
+               ipu_dp_csc_init(flow, ycbcr_enc, range,
+                               flow->foreground.in_cs, flow->out_cs,
                                DP_COM_CONF_CSC_DEF_BOTH);
        } else {
                if (flow->foreground.in_cs == IPUV3_COLORSPACE_UNKNOWN ||
@@ -192,10 +209,12 @@ int ipu_dp_setup_channel(struct ipu_dp *dp,
                         * foreground identical to output, apply color
                         * conversion on background
                         */
-                       ipu_dp_csc_init(flow, flow->background.in_cs,
+                       ipu_dp_csc_init(flow, ycbcr_enc, range,
+                                       flow->background.in_cs,
                                        flow->out_cs, DP_COM_CONF_CSC_DEF_BG);
                else
-                       ipu_dp_csc_init(flow, flow->foreground.in_cs,
+                       ipu_dp_csc_init(flow, ycbcr_enc, range,
+                                       flow->foreground.in_cs,
                                        flow->out_cs, DP_COM_CONF_CSC_DEF_FG);
        }
 

diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index d1b3889..c422a40 100644 (file)
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -17,6 +17,7 @@
 #include <linux/bitmap.h>
 #include <linux/fb.h>
 #include <linux/of.h>
+#include <drm/drm_color_mgmt.h>
 #include <media/v4l2-mediabus.h>
 #include <video/videomode.h>
 
@@ -330,6 +331,7 @@ int ipu_dp_enable_channel(struct ipu_dp *dp);
 void ipu_dp_disable_channel(struct ipu_dp *dp, bool sync);
 void ipu_dp_disable(struct ipu_soc *ipu);
 int ipu_dp_setup_channel(struct ipu_dp *dp,
+               enum drm_color_encoding ycbcr_enc, enum drm_color_range range,
                enum ipu_color_space in, enum ipu_color_space out);
 int ipu_dp_set_window_pos(struct ipu_dp *, u16 x_pos, u16 y_pos);
 int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable, u8 alpha,