Re: [PATCH v1] drm/mediatek: add ctm property support

From: CK Hu
Date: Mon Dec 02 2019 - 03:32:13 EST

Hi, Yongqiang:

On Mon, 2019-12-02 at 16:24 +0800, CK Hu wrote:
> Hi, Yongqiang:
>
> On Mon, 2019-12-02 at 15:31 +0800, yongqiang.niu@xxxxxxxxxxxx wrote:
> > From: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> >
> > add ctm property support
> >
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 7 +++-
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 59 ++++++++++++++++++++++++++++-
> > drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 9 +++++
> > 3 files changed, 72 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > index 4fb346c..e7e3aa9 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > @@ -666,10 +666,13 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
> > int i;
> >
> > if (crtc->state->color_mgmt_changed)
> > - for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> > + for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
> > mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i],
> > crtc->state,
> > mtk_crtc_state->cmdq_handle);
> > + mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
>
> This patch is based on another patch which support cmdq. So I think this
> patch would also support cmdq.
>
> > + }
> > +
> > #ifdef CONFIG_MTK_CMDQ
> > if (mtk_crtc->cmdq_client) {
> > drm_atomic_state_get(old_atomic_state);
> > @@ -891,7 +894,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > if (ret < 0)
> > return ret;
> > drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
> > - drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
> > + drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, true, MTK_LUT_SIZE);
>
> Only MT8183 has CCORR, I think you should enable ctm by SoC. (gamma has
> the same problem)

Amend: enable ctm according to the crtc which as ctm function.

Regards,
CK

>
> > priv->num_pipes++;
> > #ifdef CONFIG_MTK_CMDQ
> > mtk_crtc->cmdq_client =
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index 9cc12af..4bbbac7 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -38,7 +38,15 @@
> > #define CCORR_EN BIT(0)
> > #define DISP_CCORR_CFG 0x0020
> > #define CCORR_RELAY_MODE BIT(0)
> > +#define CCORR_ENGINE_EN BIT(1)
> > +#define CCORR_GAMMA_OFF BIT(2)
> > +#define CCORR_WGAMUT_SRC_CLIP BIT(3)
> > #define DISP_CCORR_SIZE 0x0030
> > +#define DISP_CCORR_COEF_0 0x0080
> > +#define DISP_CCORR_COEF_1 0x0084
> > +#define DISP_CCORR_COEF_2 0x0088
> > +#define DISP_CCORR_COEF_3 0x008C
> > +#define DISP_CCORR_COEF_4 0x0090
> >
> > #define DISP_DITHER_EN 0x0000
> > #define DITHER_EN BIT(0)
> > @@ -187,7 +195,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > {
> > mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
> > - mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
> > + mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
> > }
> >
> > static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
> > @@ -200,6 +208,54 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
> > writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
> > }
> >
> > +/* Converts a DRM S31.32 value to the HW S0.11 format. */
> > +static u16 mtk_ctm_s31_32_to_s0_11(u64 in)
> > +{
> > + u16 r;
> > +
> > + /* Sign bit. */
> > + r = in & BIT_ULL(63) ? BIT(11) : 0;
> > +
> > + if ((in & GENMASK_ULL(62, 33)) > 0) {
>
> if ((in & GENMASK_ULL(62, 32)) > 0) {
>
> > + /* We have zero integer bits so we can only saturate here. */
> > + r |= GENMASK(10, 0);
> > + } else {
> > + /* Otherwise take the 9 most important fractional bits. */
> > + r |= (in >> 22) & GENMASK(10, 0);
>
> r |= (in >> 21) & GENMASK(10, 0);
>
> Regards,
> CK
>
> > + }
> > +
> > + return r;
> > +}
> > +
> > +static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
> > + struct drm_crtc_state *state)
> > +{
> > + struct drm_property_blob *blob = state->ctm;
> > + struct drm_color_ctm *ctm;
> > + const u64 *input;
> > + uint16_t coeffs[9] = { 0 };
> > + int i;
> > +
> > + if (!blob)
> > + return;
> > +
> > + ctm = (struct drm_color_ctm *)blob->data;
> > + input = ctm->matrix;
> > +
> > + for (i = 0; i < ARRAY_SIZE(coeffs); i++)
> > + coeffs[i] = mtk_ctm_s31_32_to_s0_11(input[i]);
> > +
> > + writel_relaxed(coeffs[0] << 16 | coeffs[1],
> > + comp->regs + DISP_CCORR_COEF_0);
> > + writel_relaxed(coeffs[2] << 16 | coeffs[3],
> > + comp->regs + DISP_CCORR_COEF_1);
> > + writel_relaxed(coeffs[4] << 16 | coeffs[5],
> > + comp->regs + DISP_CCORR_COEF_2);
> > + writel_relaxed(coeffs[6] << 16 | coeffs[7],
> > + comp->regs + DISP_CCORR_COEF_3);
> > + writel_relaxed(coeffs[8] << 16, comp->regs + DISP_CCORR_COEF_4);
> > +}
> > +
> > static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
> > unsigned int h, unsigned int vrefresh,
> > unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > @@ -269,6 +325,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
> > .config = mtk_ccorr_config,
> > .start = mtk_ccorr_start,
> > .stop = mtk_ccorr_stop,
> > + .ctm_set = mtk_ccorr_ctm_set,
> > };
> >
> > static const struct mtk_ddp_comp_funcs ddp_dither = {
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 5b0a3d4..5100c3d 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -95,6 +95,8 @@ struct mtk_ddp_comp_funcs {
> > struct cmdq_pkt *cmdq_pkt);
> > void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
> > void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
> > + void (*ctm_set)(struct mtk_ddp_comp *comp,
> > + struct drm_crtc_state *state);
> > };
> >
> > struct mtk_ddp_comp {
> > @@ -213,6 +215,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
> > comp->funcs->bgclr_in_off(comp);
> > }
> >
> > +static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
> > + struct drm_crtc_state *state)
> > +{
> > + if (comp->funcs && comp->funcs->ctm_set)
> > + comp->funcs->ctm_set(comp, state);
> > +}
> > +
> > int mtk_ddp_comp_get_id(struct device_node *node,
> > enum mtk_ddp_comp_type comp_type);
> > int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
>
>