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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>
This commit is contained in:
Philipp Zabel 2020-07-21 11:52:18 +02:00
parent 17b9a94656
commit 4618cb7903
3 changed files with 30 additions and 6 deletions
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9
drivers/gpu/drm/imx/ipuv3-plane.c
View File

@ -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;
}

25
drivers/gpu/ipu-v3/ipu-dp.c
View File

@ -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);
}

2
include/video/imx-ipu-v3.h
View File

@ -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,