Using IS_ERR_OR_NULL() together with PTR_ERR() is a typical mistake. If the value is NULL, then the function will return 0 instead of a proper return code. Moreover dpu_hw_vbif_init() function can not return NULL. So, replace corresponding IS_ERR_OR_NULL() call with IS_ERR().

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 81a35c8d62e7..f8f1bf3b511d 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -1102,10 +1102,8 @@ static int dpu_kms_hw_init(struct msm_kms *kms)

dpu_kms->hw_vbif[vbif_idx] = dpu_hw_vbif_init(vbif_idx, dpu_kms->vbif[vbif_idx], dpu_kms->catalog); - if (IS_ERR_OR_NULL(dpu_kms->hw_vbif[vbif_idx])) { + if (IS_ERR(dpu_kms->hw_vbif[vbif_idx])) { rc = PTR_ERR(dpu_kms->hw_vbif[vbif_idx]); - if (!dpu_kms->hw_vbif[vbif_idx]) - rc = -EINVAL; DPU_ERROR("failed to init vbif %d: %d\n", vbif_idx, rc); dpu_kms->hw_vbif[vbif_idx] = NULL; goto power_error;

We do not expect to have other VBIFs. Drop VBIF_n indices and always use VBIF_RT and VBIF_NRT.

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 4 +-- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h | 6 ++-- drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 36 ++++++++++++------- 3 files changed, 28 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c index aa4d20762ccb..dbb853042aa0 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c @@ -1115,7 +1115,7 @@ static const struct dpu_vbif_dynamic_ot_cfg msm8998_ot_rdwr_cfg[] = {

static const struct dpu_vbif_cfg msm8998_vbif[] = { { - .name = "vbif_0", .id = VBIF_0, + .name = "vbif_rt", .id = VBIF_RT, .base = 0, .len = 0x1040, .default_ot_rd_limit = 32, .default_ot_wr_limit = 32, @@ -1144,7 +1144,7 @@ static const struct dpu_vbif_cfg msm8998_vbif[] = {

static const struct dpu_vbif_cfg sdm845_vbif[] = { { - .name = "vbif_0", .id = VBIF_0, + .name = "vbif_rt", .id = VBIF_RT, .base = 0, .len = 0x1040, .features = BIT(DPU_VBIF_QOS_REMAP), .xin_halt_timeout = 0x4000, diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h index bb9ceadeb0bb..598c201ae50d 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h @@ -254,11 +254,9 @@ enum dpu_wd_timer { };

enum dpu_vbif { - VBIF_0, - VBIF_1, + VBIF_RT, + VBIF_NRT, VBIF_MAX, - VBIF_RT = VBIF_0, - VBIF_NRT = VBIF_1 };

/** diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c index cbbf77b17fc3..c011d4ab6acc 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c @@ -19,6 +19,18 @@ static struct dpu_hw_vbif *dpu_get_vbif(struct dpu_kms *dpu_kms, enum dpu_vbif v return NULL; }

+static const char *dpu_vbif_name(enum dpu_vbif idx) +{ + switch (idx) { + case VBIF_RT: + return "VBIF_RT"; + case VBIF_NRT: + return "VBIF_NRT"; + default: + return "??"; + } +} + /** * _dpu_vbif_wait_for_xin_halt - wait for the xin to halt * @vbif: Pointer to hardware vbif driver @@ -50,12 +62,12 @@ static int _dpu_vbif_wait_for_xin_halt(struct dpu_hw_vbif *vbif, u32 xin_id)

if (!status) { rc = -ETIMEDOUT; - DPU_ERROR("VBIF %d client %d not halting. TIMEDOUT.\n", - vbif->idx - VBIF_0, xin_id); + DPU_ERROR("%s client %d not halting. TIMEDOUT.\n", + dpu_vbif_name(vbif->idx), xin_id); } else { rc = 0; - DRM_DEBUG_ATOMIC("VBIF %d client %d is halted\n", - vbif->idx - VBIF_0, xin_id); + DRM_DEBUG_ATOMIC("%s client %d is halted\n", + dpu_vbif_name(vbif->idx), xin_id); }

return rc; @@ -95,8 +107,8 @@ static void _dpu_vbif_apply_dynamic_ot_limit(struct dpu_hw_vbif *vbif, } }

- DRM_DEBUG_ATOMIC("vbif:%d xin:%d w:%d h:%d fps:%d pps:%llu ot:%u\n", - vbif->idx - VBIF_0, params->xin_id, + DRM_DEBUG_ATOMIC("%s xin:%d w:%d h:%d fps:%d pps:%llu ot:%u\n", + dpu_vbif_name(vbif->idx), params->xin_id, params->width, params->height, params->frame_rate, pps, *ot_lim); } @@ -141,8 +153,8 @@ static u32 _dpu_vbif_get_ot_limit(struct dpu_hw_vbif *vbif, }

exit: - DRM_DEBUG_ATOMIC("vbif:%d xin:%d ot_lim:%d\n", - vbif->idx - VBIF_0, params->xin_id, ot_lim); + DRM_DEBUG_ATOMIC("%s xin:%d ot_lim:%d\n", + dpu_vbif_name(vbif->idx), params->xin_id, ot_lim); return ot_lim; }

@@ -242,8 +254,8 @@ void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms, forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true);

for (i = 0; i < qos_tbl->npriority_lvl; i++) { - DRM_DEBUG_ATOMIC("vbif:%d xin:%d lvl:%d/%d\n", - params->vbif_idx, params->xin_id, i, + DRM_DEBUG_ATOMIC("%s xin:%d lvl:%d/%d\n", + dpu_vbif_name(params->vbif_idx), params->xin_id, i, qos_tbl->priority_lvl[i]); vbif->ops.set_qos_remap(vbif, params->xin_id, i, qos_tbl->priority_lvl[i]); @@ -263,8 +275,8 @@ void dpu_vbif_clear_errors(struct dpu_kms *dpu_kms) if (vbif && vbif->ops.clear_errors) { vbif->ops.clear_errors(vbif, &pnd, &src); if (pnd || src) { - DRM_DEBUG_KMS("VBIF %d: pnd 0x%X, src 0x%X\n", - vbif->idx - VBIF_0, pnd, src); + DRM_DEBUG_KMS("%s: pnd 0x%X, src 0x%X\n", + dpu_vbif_name(vbif->idx), pnd, src); } } }

Assuming this series is newer and supersedes https://patchwork.freedesktop.org/patch/464353/?series=97307&rev=2,

please check below.

On 2/16/2022 7:45 PM, Dmitry Baryshkov wrote:

Remove loops over hw_vbif. Instead always VBIF's idx as an index in the array. This fixes an error in dpu_kms_hw_init(), where we fill dpu_kms->hw_vbif[i], but check for an error pointer at dpu_kms->hw_vbif[vbif_idx].

Fixes: 25fdd5933e4c ("drm/msm: Add SDM845 DPU support") Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

---

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 10 ++++---- drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 29 +++++++++++------------- 2 files changed, 17 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index d0653a9ec694..81a35c8d62e7 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -790,11 +790,9 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms) _dpu_kms_mmu_destroy(dpu_kms);

if (dpu_kms->catalog) {

• for (i = 0; i < dpu_kms->catalog->vbif_count; i++) {
  

• 	u32 vbif_idx = dpu_kms->catalog->vbif[i].id;
  

• 	if ((vbif_idx < VBIF_MAX) && dpu_kms->hw_vbif[vbif_idx])
  

• 		dpu_hw_vbif_destroy(dpu_kms->hw_vbif[vbif_idx]);
  

• for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {
  

• 	if (dpu_kms->hw_vbif[i])
  

• 		dpu_hw_vbif_destroy(dpu_kms->hw_vbif[i]);
  

  } }

@@ -1102,7 +1100,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms) for (i = 0; i < dpu_kms->catalog->vbif_count; i++) { u32 vbif_idx = dpu_kms->catalog->vbif[i].id;

• dpu_kms->hw_vbif[i] = dpu_hw_vbif_init(vbif_idx,
  

• dpu_kms->hw_vbif[vbif_idx] = dpu_hw_vbif_init(vbif_idx,
  	dpu_kms->vbif[vbif_idx], dpu_kms->catalog);
  

  if (IS_ERR_OR_NULL(dpu_kms->hw_vbif[vbif_idx])) { rc = PTR_ERR(dpu_kms->hw_vbif[vbif_idx]);

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c index 21d20373eb8b..cbbf77b17fc3 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c @@ -11,6 +11,14 @@ #include "dpu_hw_vbif.h" #include "dpu_trace.h"

+static struct dpu_hw_vbif *dpu_get_vbif(struct dpu_kms *dpu_kms, enum dpu_vbif vbif_idx) +{

• if (vbif_idx > ARRAY_SIZE(dpu_kms->hw_vbif))

• return dpu_kms->hw_vbif[vbif_idx];
  

Shouldnt this be

if (vbif_idx < ARRAY_SIZE(dpu_kms->hw_vbif)) return dpu_kms->hw_vbif[vbif_idx];

• return NULL;

+}

• /**
  • _dpu_vbif_wait_for_xin_halt - wait for the xin to halt
  • @vbif: Pointer to hardware vbif driver

@@ -148,20 +156,15 @@ static u32 _dpu_vbif_get_ot_limit(struct dpu_hw_vbif *vbif, void dpu_vbif_set_ot_limit(struct dpu_kms *dpu_kms, struct dpu_vbif_set_ot_params *params) {

• struct dpu_hw_vbif *vbif = NULL;

• struct dpu_hw_vbif *vbif; struct dpu_hw_mdp *mdp; bool forced_on = false; u32 ot_lim;

• int ret, i;

• int ret;

  mdp = dpu_kms->hw_mdp;

• for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {

• if (dpu_kms->hw_vbif[i] &&
  

• 		dpu_kms->hw_vbif[i]->idx == params->vbif_idx)
  

• 	vbif = dpu_kms->hw_vbif[i];
  

• }

• vbif = dpu_get_vbif(dpu_kms, params->vbif_idx); if (!vbif || !mdp) { DRM_DEBUG_ATOMIC("invalid arguments vbif %d mdp %d\n", vbif != NULL, mdp != NULL);

@@ -204,7 +207,7 @@ void dpu_vbif_set_ot_limit(struct dpu_kms *dpu_kms, void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms, struct dpu_vbif_set_qos_params *params) {

• struct dpu_hw_vbif *vbif = NULL;

• struct dpu_hw_vbif *vbif; struct dpu_hw_mdp *mdp; bool forced_on = false; const struct dpu_vbif_qos_tbl *qos_tbl;

@@ -216,13 +219,7 @@ void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms, } mdp = dpu_kms->hw_mdp;

• for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) {

• if (dpu_kms->hw_vbif[i] &&
  

• 		dpu_kms->hw_vbif[i]->idx == params->vbif_idx) {
  

• 	vbif = dpu_kms->hw_vbif[i];
  

• 	break;
  

• }
  

• }

• vbif = dpu_get_vbif(dpu_kms, params->vbif_idx);

  if (!vbif || !vbif->cap) { DPU_ERROR("invalid vbif %d\n", params->vbif_idx);