[PATCH 17/17] drm/i915/icl: Handle expanded PLANE_CTL_FORMAT field

Paulo Zanoni
2018-01-23T19:06:10Z

From: James Ausmus <james.ausmus@intel.com>

ICL+ adds changes the PLANE_CTL_FORMAT field from [27:24] to [27:23],
however, all existing PLANE_CTL_FORMAT_* definitions still map to the
correct values. Add an ICL_PLANE_CTL_FORMAT_MASK definition, and use
that for masking for the conversion to fourcc.

v2: No changes

v3: Change new definition name, drop comment (Rodrigo)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 6 ++++++
drivers/gpu/drm/i915/intel_display.c | 5 ++++-
2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 0cb77cd18cdb..1218a6a88cd8 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6372,6 +6372,11 @@ enum {
#define _PLANE_CTL_3_A 0x70380
#define PLANE_CTL_ENABLE (1 << 31)
#define PLANE_CTL_PIPE_GAMMA_ENABLE (1 << 30) /* Pre-GLK */
+/*
+ * ICL+ uses the same PLANE_CTL_FORMAT bits, but the field definition
+ * expanded to include bit 23 as well. However, the shift-24 based values
+ * correctly map to the same formats in ICL, as long as bit 23 is set to 0
+ */
#define PLANE_CTL_FORMAT_MASK (0xf << 24)
#define PLANE_CTL_FORMAT_YUV422 ( 0 << 24)
#define PLANE_CTL_FORMAT_NV12 ( 1 << 24)
@@ -6381,6 +6386,7 @@ enum {
#define PLANE_CTL_FORMAT_AYUV ( 8 << 24)
#define PLANE_CTL_FORMAT_INDEXED ( 12 << 24)
#define PLANE_CTL_FORMAT_RGB_565 ( 14 << 24)
+#define ICL_PLANE_CTL_FORMAT_MASK (0x1f << 23)
#define PLANE_CTL_PIPE_CSC_ENABLE (1 << 23) /* Pre-GLK */
#define PLANE_CTL_KEY_ENABLE_MASK (0x3 << 21)
#define PLANE_CTL_KEY_ENABLE_SOURCE ( 1 << 21)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3eb2359c221b..7d5362e8bc3d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8516,7 +8516,10 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc,

val = I915_READ(PLANE_CTL(pipe, plane_id));

- pixel_format = val & PLANE_CTL_FORMAT_MASK;
+ if (INTEL_GEN(dev_priv) >= 11)
+ pixel_format = val & ICL_PLANE_CTL_FORMAT_MASK;
+ else
+ pixel_format = val & PLANE_CTL_FORMAT_MASK;

if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
alpha = I915_READ(PLANE_COLOR_CTL(pipe, plane_id));
--
2.14.3