[Freedreno] [PATCH 10/12] drm/msm/dpu: initialize dpu encoder and connector for writeback
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Fri Feb 4 22:34:20 UTC 2022
On 05/02/2022 00:17, Abhinav Kumar wrote:
> Initialize dpu encoder and connector for writeback if the
> target supports it in the catalog.
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk at quicinc.com>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 37 ++++++++++++-----
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 62 +++++++++++++++++++++++++++++
> 2 files changed, 88 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index b51a677..3746432 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -2066,7 +2066,7 @@ static void dpu_encoder_early_unregister(struct drm_encoder *encoder)
> }
>
> static int dpu_encoder_virt_add_phys_encs(
> - u32 display_caps,
> + struct msm_display_info *disp_info,
> struct dpu_encoder_virt *dpu_enc,
> struct dpu_enc_phys_init_params *params)
> {
> @@ -2085,7 +2085,7 @@ static int dpu_encoder_virt_add_phys_encs(
> return -EINVAL;
> }
>
> - if (display_caps & MSM_DISPLAY_CAP_VID_MODE) {
> + if (disp_info->capabilities & MSM_DISPLAY_CAP_VID_MODE) {
> enc = dpu_encoder_phys_vid_init(params);
>
> if (IS_ERR_OR_NULL(enc)) {
> @@ -2098,7 +2098,7 @@ static int dpu_encoder_virt_add_phys_encs(
> ++dpu_enc->num_phys_encs;
> }
>
> - if (display_caps & MSM_DISPLAY_CAP_CMD_MODE) {
> + if (disp_info->capabilities & MSM_DISPLAY_CAP_CMD_MODE) {
> enc = dpu_encoder_phys_cmd_init(params);
>
> if (IS_ERR_OR_NULL(enc)) {
> @@ -2111,6 +2111,19 @@ static int dpu_encoder_virt_add_phys_encs(
> ++dpu_enc->num_phys_encs;
> }
>
> + if (disp_info->intf_type == DRM_MODE_ENCODER_VIRTUAL) {
> + enc = dpu_encoder_phys_wb_init(params);
> +
> + if (IS_ERR_OR_NULL(enc)) {
> + DPU_ERROR_ENC(dpu_enc, "failed to init wb enc: %ld\n",
> + PTR_ERR(enc));
> + return enc == NULL ? -EINVAL : PTR_ERR(enc);
> + }
> +
> + dpu_enc->phys_encs[dpu_enc->num_phys_encs] = enc;
> + ++dpu_enc->num_phys_encs;
> + }
> +
> if (params->split_role == ENC_ROLE_SLAVE)
> dpu_enc->cur_slave = enc;
> else
> @@ -2199,9 +2212,8 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc,
> }
>
> if (!ret) {
> - ret = dpu_encoder_virt_add_phys_encs(disp_info->capabilities,
> - dpu_enc,
> - &phys_params);
> + ret = dpu_encoder_virt_add_phys_encs(disp_info,
> + dpu_enc, &phys_params);
> if (ret)
> DPU_ERROR_ENC(dpu_enc, "failed to add phys encs\n");
> }
> @@ -2317,11 +2329,14 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev,
> if (!dpu_enc)
> return ERR_PTR(-ENOMEM);
>
> - rc = drm_encoder_init(dev, &dpu_enc->base, &dpu_encoder_funcs,
> - drm_enc_mode, NULL);
> - if (rc) {
> - devm_kfree(dev->dev, dpu_enc);
> - return ERR_PTR(rc);
> + /* this is handled by drm_writeback_connector_init for virtual encoder */
> + if (drm_enc_mode != DRM_MODE_ENCODER_VIRTUAL) {
> + rc = drm_encoder_init(dev, &dpu_enc->base, &dpu_encoder_funcs,
> + drm_enc_mode, NULL);
> + if (rc) {
> + devm_kfree(dev->dev, dpu_enc);
> + return ERR_PTR(rc);
> + }
> }
>
> drm_encoder_helper_add(&dpu_enc->base, &dpu_encoder_helper_funcs);
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 47fe11a..6327ba9 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -1,5 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0-only
> /*
> + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
> * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
> * Copyright (C) 2013 Red Hat
> * Author: Rob Clark <robdclark at gmail.com>
> @@ -15,6 +16,7 @@
> #include <drm/drm_crtc.h>
> #include <drm/drm_file.h>
> #include <drm/drm_vblank.h>
> +#include <drm/drm_writeback.h>
>
> #include "msm_drv.h"
> #include "msm_mmu.h"
> @@ -29,6 +31,7 @@
> #include "dpu_kms.h"
> #include "dpu_plane.h"
> #include "dpu_vbif.h"
> +#include "dpu_writeback.h"
>
> #define CREATE_TRACE_POINTS
> #include "dpu_trace.h"
> @@ -642,6 +645,56 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
> return 0;
> }
>
> +static int _dpu_kms_initialize_writeback(struct drm_device *dev,
> + struct msm_drm_private *priv, struct dpu_kms *dpu_kms)
> +{
> + struct drm_encoder *encoder = NULL;
> + struct msm_display_info info;
> + int rc, i;
> + const u32 *wb_formats;
> + int n_formats;
> +
> + encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_VIRTUAL);
> + if (IS_ERR(encoder)) {
> + DPU_ERROR("encoder init failed for dsi display\n");
> + return PTR_ERR(encoder);
> + }
> +
> + memset(&info, 0, sizeof(info));
> +
> + for (i = 0; i < dpu_kms->catalog->wb_count; i++) {
> + if (dpu_kms->catalog->wb[i].id == WB_2) {
> + wb_formats = dpu_kms->catalog->wb[i].format_list;
> + n_formats = dpu_kms->catalog->wb[i].num_formats;
> + }
> + }
If there is no WB_2 in the catalog, then both wb_formats and n_formats
would be unused. Also even if there is no WB_2 you'd still try creating
the writeback below.
I'd suggest to move dpu_encoder_init() + dpu_writeback_init() +
dpu_encoder_setup() to the separate function. Then you can loop over the
catslog->wb[] and once WB_2 is found, call this new function.
> +
> + rc = dpu_writeback_init(dev, encoder, encoder->helper_private, wb_formats,
> + n_formats);
> + if (rc) {
> + DPU_ERROR("dpu_writeback_init, rc = %d\n", rc);
> + drm_encoder_cleanup(encoder);
> + return rc;
> + }
> +
> + priv->encoders[priv->num_encoders++] = encoder;
> +
> + info.num_of_h_tiles = 1;
> + /* use only WB idx 2 instance for DPU */
> + info.h_tile_instance[0] = WB_2;
> + info.capabilities = MSM_DISPLAY_CAP_HOT_PLUG | MSM_DISPLAY_CAP_EDID;
these two capabilities are unused in the code. I'd suggest to drop them
from msm_drv.h at all.
> + info.intf_type = encoder->encoder_type;
> +
> + rc = dpu_encoder_setup(dev, encoder, &info);
> + if (rc) {
> + DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
> + encoder->base.id, rc);
> + return rc;
> + }
> +
> + return 0;
> +}
> +
> /**
> * _dpu_kms_setup_displays - create encoders, bridges and connectors
> * for underlying displays
> @@ -668,6 +721,15 @@ static int _dpu_kms_setup_displays(struct drm_device *dev,
> return rc;
> }
>
> + /* Since WB isn't a driver check the catalog before initializing */
> + if (dpu_kms->catalog->wb_count) {
> + rc = _dpu_kms_initialize_writeback(dev, priv, dpu_kms);
> + if (rc) {
> + DPU_ERROR("initialize_WB failed, rc = %d\n", rc);
> + return rc;
> + }
> + }
> +
> return rc;
> }
>
--
With best wishes
Dmitry
More information about the Freedreno
mailing list