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drm/msm/mdp4: move HW revision detection to earlier phase 

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

Fixes: eb2b47bb9a ("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>
This commit is contained in:
David Heidelberg 2021-07-06 01:16:41 +02:00 committed by Rob Clark
parent 4d319afe66
commit 4af4fc9293
1 changed files with 22 additions and 23 deletions
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45
drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
View File

@ -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;
@ -428,6 +416,7 @@ 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) {
@ -488,15 +477,6 @@ 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");
@ -505,8 +485,27 @@ 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;