[Freedreno] [PATCH 1/2] drm/msm/dpu: move writeback's atomic_check to dpu_writeback.c
Abhinav Kumar
quic_abhinavk at quicinc.com
Tue Aug 8 00:33:41 UTC 2023
On 5/18/2023 7:30 PM, Dmitry Baryshkov wrote:
> dpu_encoder_phys_wb is the only user of encoder's atomic_check callback.
> Move corresponding checks to drm_writeback_connector's implementation
> and drop the dpu_encoder_phys_wb_atomic_check() function.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> ---
I dont think this is correct even though I can make writeback work with
these. The issue is that, in the recent changes which I was holding back
posting till I reviewed this, I use the API
drm_atomic_helper_check_wb_encoder_state() to check the supported
formats in writeback (something which should have been present from the
beginning).
It seems incorrect to call this from the connector's atomic_check.
And I checked the writeback job validation across other vendor drivers
and the validation seems to be in encoder's atomic_check and not the
connector's.
I dont want to break that pattern for MSM alone.
> .../drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 54 ------------------
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 +-
> drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c | 57 ++++++++++++++++++-
> drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h | 3 +-
> 4 files changed, 60 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> index e14646c0501c..e73d5284eb2a 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c
> @@ -225,59 +225,6 @@ static void dpu_encoder_phys_wb_setup_cdp(struct dpu_encoder_phys *phys_enc)
> }
> }
>
> -/**
> - * dpu_encoder_phys_wb_atomic_check - verify and fixup given atomic states
> - * @phys_enc: Pointer to physical encoder
> - * @crtc_state: Pointer to CRTC atomic state
> - * @conn_state: Pointer to connector atomic state
> - */
> -static int dpu_encoder_phys_wb_atomic_check(
> - struct dpu_encoder_phys *phys_enc,
> - struct drm_crtc_state *crtc_state,
> - struct drm_connector_state *conn_state)
> -{
> - struct drm_framebuffer *fb;
> - const struct drm_display_mode *mode = &crtc_state->mode;
> -
> - DPU_DEBUG("[atomic_check:%d, \"%s\",%d,%d]\n",
> - phys_enc->hw_wb->idx, mode->name, mode->hdisplay, mode->vdisplay);
> -
> - if (!conn_state || !conn_state->connector) {
> - DPU_ERROR("invalid connector state\n");
> - return -EINVAL;
> - } else if (conn_state->connector->status !=
> - connector_status_connected) {
> - DPU_ERROR("connector not connected %d\n",
> - conn_state->connector->status);
> - return -EINVAL;
> - }
> -
> - if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> - return 0;
> -
> - fb = conn_state->writeback_job->fb;
> -
> - DPU_DEBUG("[fb_id:%u][fb:%u,%u]\n", fb->base.id,
> - fb->width, fb->height);
> -
> - if (fb->width != mode->hdisplay) {
> - DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width,
> - mode->hdisplay);
> - return -EINVAL;
> - } else if (fb->height != mode->vdisplay) {
> - DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height,
> - mode->vdisplay);
> - return -EINVAL;
> - } else if (fb->width > phys_enc->hw_wb->caps->maxlinewidth) {
> - DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n",
> - fb->width, phys_enc->hw_wb->caps->maxlinewidth);
> - return -EINVAL;
> - }
> -
> - return 0;
> -}
> -
> -
> /**
> * _dpu_encoder_phys_wb_update_flush - flush hardware update
> * @phys_enc: Pointer to physical encoder
> @@ -652,7 +599,6 @@ static void dpu_encoder_phys_wb_init_ops(struct dpu_encoder_phys_ops *ops)
> ops->enable = dpu_encoder_phys_wb_enable;
> ops->disable = dpu_encoder_phys_wb_disable;
> ops->destroy = dpu_encoder_phys_wb_destroy;
> - ops->atomic_check = dpu_encoder_phys_wb_atomic_check;
> ops->wait_for_commit_done = dpu_encoder_phys_wb_wait_for_commit_done;
> ops->prepare_for_kickoff = dpu_encoder_phys_wb_prepare_for_kickoff;
> ops->handle_post_kickoff = dpu_encoder_phys_wb_handle_post_kickoff;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 10bd0fd4ff48..78b8e7fc1de8 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -661,8 +661,8 @@ static int _dpu_kms_initialize_writeback(struct drm_device *dev,
> return PTR_ERR(encoder);
> }
>
> - rc = dpu_writeback_init(dev, encoder, wb_formats,
> - n_formats);
> + rc = dpu_writeback_init(dev, encoder, wb_formats, n_formats,
> + dpu_rm_get_wb(&dpu_kms->rm, info.h_tile_instance[0])->caps->maxlinewidth);
> if (rc) {
> DPU_ERROR("dpu_writeback_init, rc = %d\n", rc);
> drm_encoder_cleanup(encoder);
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> index 2a5a68366582..7f345a5c8be3 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.c
> @@ -4,6 +4,7 @@
> */
>
> #include <drm/drm_edid.h>
> +#include <drm/drm_framebuffer.h>
>
> #include "dpu_writeback.h"
>
> @@ -24,6 +25,57 @@ static int dpu_wb_conn_get_modes(struct drm_connector *connector)
> dev->mode_config.max_height);
> }
>
> +static int dpu_wb_conn_atomic_check(struct drm_connector *connector,
> + struct drm_atomic_state *state)
> +{
> + struct drm_writeback_connector *wb_conn = drm_connector_to_writeback(connector);
> + struct dpu_wb_connector *dpu_wb_conn = to_dpu_wb_conn(wb_conn);
> + struct drm_connector_state *conn_state =
> + drm_atomic_get_new_connector_state(state, connector);
> + struct drm_crtc *crtc = conn_state->crtc;
> + struct drm_crtc_state *crtc_state;
> + const struct drm_display_mode *mode;
> + struct drm_framebuffer *fb;
> +
> + crtc_state = drm_atomic_get_crtc_state(state, crtc);
> + if (IS_ERR(crtc_state))
> + return PTR_ERR(crtc_state);
> +
> + mode = &crtc_state->mode;
> +
> + DPU_DEBUG("[atomic_check:%d, \"%s\",%d,%d]\n",
> + connector->base.id, mode->name, mode->hdisplay, mode->vdisplay);
> +
> + if (!conn_state || !conn_state->connector) {
> + DPU_ERROR("invalid connector state\n");
> + return -EINVAL;
> + } else if (conn_state->connector->status != connector_status_connected) {
> + DPU_ERROR("connector not connected %d\n", conn_state->connector->status);
> + return -EINVAL;
> + }
> +
> + if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> + return 0;
> +
> + fb = conn_state->writeback_job->fb;
> +
> + DPU_DEBUG("[fb_id:%u][fb:%u,%u]\n", fb->base.id, fb->width, fb->height);
> +
> + if (fb->width != mode->hdisplay) {
> + DPU_ERROR("invalid fb w=%d, mode w=%d\n", fb->width, mode->hdisplay);
> + return -EINVAL;
> + } else if (fb->height != mode->vdisplay) {
> + DPU_ERROR("invalid fb h=%d, mode h=%d\n", fb->height, mode->vdisplay);
> + return -EINVAL;
> + } else if (fb->width > dpu_wb_conn->maxlinewidth) {
> + DPU_ERROR("invalid fb w=%d, maxlinewidth=%u\n",
> + fb->width, dpu_wb_conn->maxlinewidth);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> static const struct drm_connector_funcs dpu_wb_conn_funcs = {
> .reset = drm_atomic_helper_connector_reset,
> .fill_modes = drm_helper_probe_single_connector_modes,
> @@ -59,12 +111,13 @@ static void dpu_wb_conn_cleanup_job(struct drm_writeback_connector *connector,
>
> static const struct drm_connector_helper_funcs dpu_wb_conn_helper_funcs = {
> .get_modes = dpu_wb_conn_get_modes,
> + .atomic_check = dpu_wb_conn_atomic_check,
> .prepare_writeback_job = dpu_wb_conn_prepare_job,
> .cleanup_writeback_job = dpu_wb_conn_cleanup_job,
> };
>
> int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
> - const u32 *format_list, u32 num_formats)
> + const u32 *format_list, u32 num_formats, u32 maxlinewidth)
> {
> struct dpu_wb_connector *dpu_wb_conn;
> int rc = 0;
> @@ -73,6 +126,8 @@ int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
> if (!dpu_wb_conn)
> return -ENOMEM;
>
> + dpu_wb_conn->maxlinewidth = maxlinewidth;
> +
> drm_connector_helper_add(&dpu_wb_conn->base.base, &dpu_wb_conn_helper_funcs);
>
> /* DPU initializes the encoder and sets it up completely for writeback
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
> index 5a75ea916101..4b11cca8014c 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_writeback.h
> @@ -18,6 +18,7 @@
> struct dpu_wb_connector {
> struct drm_writeback_connector base;
> struct drm_encoder *wb_enc;
> + u32 maxlinewidth;
> };
>
> static inline struct dpu_wb_connector *to_dpu_wb_conn(struct drm_writeback_connector *conn)
> @@ -26,6 +27,6 @@ static inline struct dpu_wb_connector *to_dpu_wb_conn(struct drm_writeback_conne
> }
>
> int dpu_writeback_init(struct drm_device *dev, struct drm_encoder *enc,
> - const u32 *format_list, u32 num_formats);
> + const u32 *format_list, u32 num_formats, u32 maxlinewidth);
>
> #endif /*_DPU_WRITEBACK_H */
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