Hi Lowry,
On Tue, Oct 08, 2019 at 09:17:52AM +0000, Lowry Li (Arm Technology China) wrote:
> Set color_depth according to connector->bpc.
>
> Signed-off-by: Lowry Li (Arm Technology China) <lowry...@arm.com>
> ---
> .../arm/display/komeda/d71/d71_component.c | 1 +
> .../gpu/drm/arm/display/komeda/komeda_crtc.c | 20 +++++++++++++++++++
> .../gpu/drm/arm/display/komeda/komeda_kms.h | 2 ++
> .../drm/arm/display/komeda/komeda_pipeline.h | 1 +
> .../display/komeda/komeda_pipeline_state.c | 19 ++++++++++++++++++
> .../arm/display/komeda/komeda_wb_connector.c | 4 ++++
> 6 files changed, 47 insertions(+)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> index c3d29c0b051b..27cdb03573c1 100644
> --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> @@ -951,6 +951,7 @@ static void d71_improc_update(struct komeda_component *c,
> to_d71_input_id(state, index));
>
> malidp_write32(reg, BLK_SIZE, HV_SIZE(st->hsize, st->vsize));
> + malidp_write32(reg, IPS_DEPTH, st->color_depth);
> }
>
> static void d71_improc_dump(struct komeda_component *c, struct seq_file *sf)
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> index 75263d8cd0bd..baa986b70876 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> @@ -17,6 +17,26 @@
> #include "komeda_dev.h"
> #include "komeda_kms.h"
>
> +void komeda_crtc_get_color_config(struct drm_crtc_state *crtc_st,
> + u32 *color_depths)
> +{
> + struct drm_connector *conn;
> + struct drm_connector_state *conn_st;
> + int i, min_bpc = 31, conn_bpc = 0;
> +
> + for_each_new_connector_in_state(crtc_st->state, conn, conn_st, i) {
> + if (conn_st->crtc != crtc_st->crtc)
> + continue;
> +
> + conn_bpc = conn->display_info.bpc ? conn->display_info.bpc : 8;
We can have multiple connectors on a single CRTC (e.g. normal +
writeback), so what's the expected behaviour here in that case?
> +
> + if (conn_bpc < min_bpc)
> + min_bpc = conn_bpc;
> + }
> +
> + *color_depths = GENMASK(conn_bpc, 0);
> +}
> +
> static void komeda_crtc_update_clock_ratio(struct komeda_crtc_state
> *kcrtc_st)
> {
> u64 pxlclk, aclk;
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> index 45c498e15e7a..a42503451b5d 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> @@ -166,6 +166,8 @@ static inline bool has_flip_h(u32 rot)
> return !!(rotation & DRM_MODE_REFLECT_X);
> }
>
> +void komeda_crtc_get_color_config(struct drm_crtc_state *crtc_st,
> + u32 *color_depths);
> unsigned long komeda_crtc_get_aclk(struct komeda_crtc_state *kcrtc_st);
>
> int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, struct komeda_dev
> *mdev);
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> index b322f52ba8f2..7653f134a8eb 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> @@ -323,6 +323,7 @@ struct komeda_improc {
>
> struct komeda_improc_state {
> struct komeda_component_state base;
> + u8 color_depth;
> u16 hsize, vsize;
> };
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> index 0ba9c6aa3708..e68e8f85ab27 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> @@ -743,6 +743,7 @@ komeda_improc_validate(struct komeda_improc *improc,
> struct komeda_data_flow_cfg *dflow)
> {
> struct drm_crtc *crtc = kcrtc_st->base.crtc;
> + struct drm_crtc_state *crtc_st = &kcrtc_st->base;
> struct komeda_component_state *c_st;
> struct komeda_improc_state *st;
>
> @@ -756,6 +757,24 @@ komeda_improc_validate(struct komeda_improc *improc,
> st->hsize = dflow->in_w;
> st->vsize = dflow->in_h;
>
> + if (drm_atomic_crtc_needs_modeset(crtc_st)) {
> + u32 output_depths;
> + u32 avail_depths;
> +
> + komeda_crtc_get_color_config(crtc_st,
> + &output_depths);
> +
> + avail_depths = output_depths & improc->supported_color_depths;
> + if (avail_depths == 0) {
> + DRM_DEBUG_ATOMIC("No available color depths, conn
> depths: 0x%x & display: 0x%x\n",
> + output_depths,
> + improc->supported_color_depths);
> + return -EINVAL;
> + }
> +
> + st->color_depth = __fls(avail_depths);
> + }
> +
> komeda_component_add_input(&st->base, &dflow->input, 0);
> komeda_component_set_output(&dflow->input, &improc->base, 0);
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> index 2851cac94d86..740a81250630 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> @@ -142,6 +142,7 @@ static int komeda_wb_connector_add(struct komeda_kms_dev
> *kms,
> struct komeda_dev *mdev = kms->base.dev_private;
> struct komeda_wb_connector *kwb_conn;
> struct drm_writeback_connector *wb_conn;
> + struct drm_display_info *info;
> u32 *formats, n_formats = 0;
> int err;
>
> @@ -171,6 +172,9 @@ static int komeda_wb_connector_add(struct komeda_kms_dev
> *kms,
>
> drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs);
>
> + info = &kwb_conn->base.base.display_info;
> + info->bpc = __fls(kcrtc->master->improc->supported_color_depths);
> +
The IPS color depth doesn't really apply to writeback. Maybe we should
just skip the writeback connector?
Thanks,
-Brian
> kcrtc->wb_conn = kwb_conn;
>
> return 0;
> --
> 2.17.1
>
