[PATCH 5.10 134/236] drm/msm/mdp4: move HW revision detection to earlier phase

Greg Kroah-Hartman
2021-09-13T13:44:52Z

From: David Heidelberg <david@ixit.cz>

[ Upstream commit 4af4fc92939dc811ef291c0673946555aa4fb71f ]

Fixes if condition, which never worked inside mdp4_kms_init, since
HW detection has been done later in mdp4_hw_init.

Fixes: eb2b47bb9a03 ("drm/msm/mdp4: only use lut_clk on mdp4.2+")

Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20210705231641.315804-2-david@ixit.cz
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 45 ++++++++++++------------
1 file changed, 22 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index b73af9ddcf72..c1c152e39918 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -19,23 +19,12 @@ static int mdp4_hw_init(struct msm_kms *kms)
{
struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
struct drm_device *dev = mdp4_kms->dev;
- u32 major, minor, dmap_cfg, vg_cfg;
+ u32 dmap_cfg, vg_cfg;
unsigned long clk;
int ret = 0;

pm_runtime_get_sync(dev->dev);

- read_mdp_hw_revision(mdp4_kms, &major, &minor);
-
- if (major != 4) {
- DRM_DEV_ERROR(dev->dev, "unexpected MDP version: v%d.%d\n",
- major, minor);
- ret = -ENXIO;
- goto out;
- }
-
- mdp4_kms->rev = minor;
-
if (mdp4_kms->rev > 1) {
mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
@@ -81,7 +70,6 @@ static int mdp4_hw_init(struct msm_kms *kms)
if (mdp4_kms->rev > 1)
mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);

-out:
pm_runtime_put_sync(dev->dev);

return ret;
@@ -426,6 +414,7 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
struct msm_kms *kms = NULL;
struct msm_gem_address_space *aspace;
int irq, ret;
+ u32 major, minor;

mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
if (!mdp4_kms) {
@@ -482,15 +471,6 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
if (IS_ERR(mdp4_kms->pclk))
mdp4_kms->pclk = NULL;

- if (mdp4_kms->rev >= 2) {
- mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
- if (IS_ERR(mdp4_kms->lut_clk)) {
- DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n");
- ret = PTR_ERR(mdp4_kms->lut_clk);
- goto fail;
- }
- }
-
mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
if (IS_ERR(mdp4_kms->axi_clk)) {
DRM_DEV_ERROR(dev->dev, "failed to get axi_clk\n");
@@ -499,8 +479,27 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev)
}

clk_set_rate(mdp4_kms->clk, config->max_clk);
- if (mdp4_kms->lut_clk)
+
+ read_mdp_hw_revision(mdp4_kms, &major, &minor);
+
+ if (major != 4) {
+ DRM_DEV_ERROR(dev->dev, "unexpected MDP version: v%d.%d\n",
+ major, minor);
+ ret = -ENXIO;
+ goto fail;
+ }
+
+ mdp4_kms->rev = minor;
+
+ if (mdp4_kms->rev >= 2) {
+ mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
+ if (IS_ERR(mdp4_kms->lut_clk)) {
+ DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n");
+ ret = PTR_ERR(mdp4_kms->lut_clk);
+ goto fail;
+ }
clk_set_rate(mdp4_kms->lut_clk, config->max_clk);
+ }

pm_runtime_enable(dev->dev);
mdp4_kms->rpm_enabled = true;
--
2.30.2