Re: [Freedreno] [PATCH v1 3/7] drm/msm/dpu: support setting up two independent DSI connectors

On 2021-07-08 05:28, Dmitry Baryshkov wrote:

Move setting up encoders from set_encoder_mode to _dpu_kms_initialize_dsi() / _dpu_kms_initialize_displayport(). This allows us to support not only "single DSI" and "bonded DSI" but also "two independent DSI" configurations. In future this would also help adding support for multiple DP connectors.

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 102 +++++++++++++----------- 1 file changed, 57 insertions(+), 45 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 1d3a4f395e74..8459da36174e 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -471,30 +471,68 @@ static int _dpu_kms_initialize_dsi(struct drm_device *dev, struct dpu_kms *dpu_kms) { struct drm_encoder *encoder = NULL;

• struct msm_display_info info; int i, rc = 0;

  if (!(priv->dsi[0] || priv->dsi[1])) return rc;

• /*TODO: Support two independent DSI connectors */
• encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DSI);
• if (IS_ERR(encoder)) {

• DPU_ERROR("encoder init failed for dsi display\n");
  

• return PTR_ERR(encoder);
  

• }
• priv->encoders[priv->num_encoders++] = encoder;

• /*

• * We support following confiurations:
  

• * - Single DSI host (dsi0 or dsi1)
  

• * - Two independent DSI hosts
  

• * - Bonded DSI0 and DSI1 hosts
  

• *
  

• *   TODO: Support swapping DSI0 and DSI1 in the bonded setup.
  

• */
  

  for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) { if (!priv->dsi[i]) continue;

• if (!encoder) {
  

• 	encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DSI);
  

• 	if (IS_ERR(encoder)) {
  

• 		DPU_ERROR("encoder init failed for dsi display\n");
  

• 		return PTR_ERR(encoder);
  

• 	}
  

• 	priv->encoders[priv->num_encoders++] = encoder;
  

• 	memset(&info, 0, sizeof(info));
  

• 	info.intf_type = encoder->encoder_type;
  

• 	info.capabilities = msm_dsi_is_cmd_mode(priv->dsi[i]) ?
  

• 		MSM_DISPLAY_CAP_CMD_MODE :
  

• 		MSM_DISPLAY_CAP_VID_MODE;
  

• }
  

• rc = msm_dsi_modeset_init(priv->dsi[i], dev, encoder); if (rc) { DPU_ERROR("modeset_init failed for dsi[%d], rc = %d\n", i, rc); break; }

• info.h_tile_instance[info.num_of_h_tiles++] = i;
  

• /* Register non-bonded encoder here. If the encoder is bonded,
  

•  * it will be registered later, when both DSI hosts are
  

•  * initialized.
  

•  */
  

• if (!msm_dsi_is_bonded_dsi(priv->dsi[i])) {
  

• 	rc = dpu_encoder_setup(dev, encoder, &info);
  

• 	if (rc)
  

• 		DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
  

• 			  encoder->base.id, rc);
  

• 	encoder = NULL;
  

Seems like you are using encoder = NULL as a check to distinguish whether this is bonded mode or not.

• }
  

• }
• /* Register bonded encoder here, when both DSI hosts are initialized

*/

• if (encoder) {

Why cant we replace this with if (msm_dsi_is_bonded_dsi(priv->dsi[i]) and get rid of the encoder = NULL?

• 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;

@@ -505,6 +543,7 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev, struct dpu_kms *dpu_kms) { struct drm_encoder *encoder = NULL;

• struct msm_display_info info; int rc = 0;

  if (!priv->dp)

@@ -516,6 +555,7 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev, return PTR_ERR(encoder); }

• memset(&info, 0, sizeof(info)); rc = msm_dp_modeset_init(priv->dp, dev, encoder); if (rc) { DPU_ERROR("modeset_init failed for DP, rc = %d\n", rc);

@@ -524,6 +564,14 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev, }

priv->encoders[priv->num_encoders++] = encoder;

• info.num_of_h_tiles = 1;
• info.capabilities = MSM_DISPLAY_CAP_VID_MODE;
• 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;

}

@@ -726,41 +774,6 @@ static void dpu_kms_destroy(struct msm_kms *kms) msm_kms_destroy(&dpu_kms->base); }

-static void _dpu_kms_set_encoder_mode(struct msm_kms *kms,

• 		 struct drm_encoder *encoder,
  

• 		 bool cmd_mode)
  

-{

• struct msm_display_info info;
• struct msm_drm_private *priv = encoder->dev->dev_private;
• int i, rc = 0;
• memset(&info, 0, sizeof(info));
• info.intf_type = encoder->encoder_type;
• info.capabilities = cmd_mode ? MSM_DISPLAY_CAP_CMD_MODE :

• 	MSM_DISPLAY_CAP_VID_MODE;
  

• switch (info.intf_type) {
• case DRM_MODE_ENCODER_DSI:

• /* TODO: No support for DSI swap */
  

• for (i = 0; i < ARRAY_SIZE(priv->dsi); i++) {
  

• 	if (priv->dsi[i]) {
  

• 		info.h_tile_instance[info.num_of_h_tiles] = i;
  

• 		info.num_of_h_tiles++;
  

• 	}
  

• }
  

• break;
  

• case DRM_MODE_ENCODER_TMDS:

• info.num_of_h_tiles = 1;
  

• break;
  

• }
• rc = dpu_encoder_setup(encoder->dev, encoder, &info);
• if (rc)

• DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
  

• 	encoder->base.id, rc);
  

-}

static irqreturn_t dpu_irq(struct msm_kms *kms) { struct dpu_kms *dpu_kms = to_dpu_kms(kms); @@ -863,7 +876,6 @@ static const struct msm_kms_funcs kms_funcs = { .get_format = dpu_get_msm_format, .round_pixclk = dpu_kms_round_pixclk, .destroy = dpu_kms_destroy,

• .set_encoder_mode = _dpu_kms_set_encoder_mode, .snapshot = dpu_kms_mdp_snapshot,

#ifdef CONFIG_DEBUG_FS .debugfs_init = dpu_kms_debugfs_init,