[Intel-gfx] [PATCH 14/15] drm/i915: skl nv12 workarounds
Chandra Konduru
chandra.konduru at intel.com
Wed Aug 19 18:02:35 PDT 2015
Adding driver workarounds for nv12.
Signed-off-by: Chandra Konduru <chandra.konduru at intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 20 ++++++++++++++++++++
drivers/gpu/drm/i915/intel_csr.c | 2 +-
drivers/gpu/drm/i915/intel_display.c | 31 +++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_sprite.c | 7 +++++++
5 files changed, 60 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index c4d732f..3192837 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5354,6 +5354,26 @@ enum skl_disp_power_wells {
#define PLANE_NV12_BUF_CFG(pipe, plane) \
_PLANE(plane, _PLANE_NV12_BUF_CFG_1(pipe), _PLANE_NV12_BUF_CFG_2(pipe))
+/*
+ * Skylake Chicken registers
+ */
+#define _CHICKEN_PIPESL_A 0x420B0
+#define _CHICKEN_PIPESL_B 0x420B4
+#define _CHICKEN_PIPESL_C 0x420B8
+#define DISABLE_STREAMER_FIX (1 << 22)
+#define CHICKEN_PIPESL(pipe) _PIPE(pipe, _CHICKEN_PIPESL_A, _CHICKEN_PIPESL_B)
+
+#define CHICKEN_DCPR_1 0x46430
+#define IDLE_WAKEMEM_MASK (1 << 13)
+
+#define CLKGATE_DIS_PSL_A 0x46520
+#define CLKGATE_DIS_PSL_B 0x46524
+#define CLKGATE_DIS_PSL_C 0x46528
+#define DUPS1_GATING_DIS (1 << 15)
+#define DUPS2_GATING_DIS (1 << 19)
+#define DUPS3_GATING_DIS (1 << 23)
+#define CLKGATE_DIS_PSL(pipe) _PIPE(pipe, CLKGATE_DIS_PSL_A, CLKGATE_DIS_PSL_B)
+
/* SKL new cursor registers */
#define _CUR_BUF_CFG_A 0x7017c
#define _CUR_BUF_CFG_B 0x7117c
diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index ba1ae03..559a7f5 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -181,7 +181,7 @@ static const struct stepping_info skl_stepping_info[] = {
{'G', '0'}, {'H', '0'}, {'I', '0'}
};
-static char intel_get_stepping(struct drm_device *dev)
+char intel_get_stepping(struct drm_device *dev)
{
if (IS_SKYLAKE(dev) && (dev->pdev->revision <
ARRAY_SIZE(skl_stepping_info)))
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 419660d..2158b8f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3196,6 +3196,16 @@ static void skylake_update_primary_plane(struct drm_crtc *crtc,
I915_WRITE(PLANE_AUX_DIST(pipe, 0), aux_dist | aux_stride);
I915_WRITE(PLANE_AUX_OFFSET(pipe, 0), aux_y_offset << 16 | aux_x_offset);
+ DRM_DEBUG_KMS("KCM: is_skl = %d is_bxt = %d\n",
+ IS_SKYLAKE(dev), IS_BROXTON(dev));
+
+ if (((IS_SKYLAKE(dev) && intel_get_stepping(dev) == 'C') ||
+ (IS_BROXTON(dev) && intel_get_stepping(dev) == 'A')) &&
+ fb->pixel_format == DRM_FORMAT_NV12) {
+ I915_WRITE(CHICKEN_PIPESL(pipe),
+ I915_READ(CHICKEN_PIPESL(pipe)) | DISABLE_STREAMER_FIX);
+ }
+
if (scaler_id >= 0) {
uint32_t ps_ctrl = 0;
@@ -5004,6 +5014,21 @@ static bool hsw_crtc_supports_ips(struct intel_crtc *crtc)
return HAS_IPS(crtc->base.dev) && crtc->pipe == PIPE_A;
}
+
+static void skl_wa_clkgate(struct drm_i915_private *dev_priv,
+ int pipe, int enable)
+{
+ if (pipe == PIPE_A || pipe == PIPE_B) {
+ if (enable)
+ I915_WRITE(CLKGATE_DIS_PSL(pipe),
+ DUPS1_GATING_DIS | DUPS2_GATING_DIS);
+ else
+ I915_WRITE(CLKGATE_DIS_PSL(pipe),
+ I915_READ(CLKGATE_DIS_PSL(pipe) &
+ ~(DUPS1_GATING_DIS|DUPS2_GATING_DIS)));
+ }
+}
+
static void haswell_crtc_enable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
@@ -5094,6 +5119,9 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
intel_wait_for_vblank(dev, hsw_workaround_pipe);
intel_wait_for_vblank(dev, hsw_workaround_pipe);
}
+
+ /* workaround for NV12 */
+ skl_wa_clkgate(dev_priv, pipe, 1);
}
static void ironlake_pfit_disable(struct intel_crtc *crtc)
@@ -5211,6 +5239,9 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
intel_crtc->active = false;
intel_update_watermarks(crtc);
+
+ /* workaround for NV12 */
+ skl_wa_clkgate(dev_priv, intel_crtc->pipe, 0);
}
static void i9xx_pfit_enable(struct intel_crtc *crtc)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index d50b8cb..63750d5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1158,6 +1158,7 @@ void intel_csr_load_status_set(struct drm_i915_private *dev_priv,
enum csr_state state);
void intel_csr_load_program(struct drm_device *dev);
void intel_csr_ucode_fini(struct drm_device *dev);
+char intel_get_stepping(struct drm_device *dev);
void assert_csr_loaded(struct drm_i915_private *dev_priv);
/* intel_dp.c */
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 0ea9273..9d1c5b9 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -278,6 +278,13 @@ skl_update_plane(struct drm_plane *drm_plane, struct drm_crtc *crtc,
I915_WRITE(PLANE_AUX_DIST(pipe, plane), aux_dist | aux_stride);
I915_WRITE(PLANE_AUX_OFFSET(pipe, plane), aux_y_offset<<16 | aux_x_offset);
+ if (((IS_SKYLAKE(dev) && intel_get_stepping(dev) == 'C') ||
+ (IS_BROXTON(dev) && intel_get_stepping(dev) == 'A')) &&
+ fb->pixel_format == DRM_FORMAT_NV12) {
+ I915_WRITE(CHICKEN_PIPESL(pipe),
+ I915_READ(CHICKEN_PIPESL(pipe)) | DISABLE_STREAMER_FIX);
+ }
+
/* program plane scaler */
if (scaler_id >= 0) {
uint32_t ps_ctrl = 0;
--
1.7.9.5
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