-----Original Message----- From: Intel-gfx intel-gfx-bounces@lists.freedesktop.org On Behalf Of Shankar, Uma Sent: Wednesday, August 11, 2021 11:39 AM To: Nautiyal, Ankit K ankit.k.nautiyal@intel.com; intel-gfx@lists.freedesktop.org Cc: Zanoni, Paulo R paulo.r.zanoni@intel.com; ville.syrjala@linux.intel.com; daniel.vetter@ffwll.ch; jani.nikula@linux.intel.com; joonas.lahtinen@linux.intel.com; Vivi, Rodrigo rodrigo.vivi@intel.com; stable@vger.kernel.org Subject: Re: [Intel-gfx] [PATCH v3] drm/i915/display: Fix the 12 BPC bits for PIPE_MISC reg
Change pushed to drm-intel-next. Thanks for the patch.
Regards, Uma Shankar
-----Original Message----- From: Nautiyal, Ankit K ankit.k.nautiyal@intel.com Sent: Wednesday, August 11, 2021 10:49 AM To: intel-gfx@lists.freedesktop.org Cc: Shankar, Uma uma.shankar@intel.com; Zanoni, Paulo R paulo.r.zanoni@intel.com; ville.syrjala@linux.intel.com; daniel.vetter@ffwll.ch; jani.nikula@linux.intel.com; joonas.lahtinen@linux.intel.com; Vivi, Rodrigo rodrigo.vivi@intel.com; stable@vger.kernel.org; Nautiyal, Ankit K ankit.k.nautiyal@intel.com Subject: [PATCH v3] drm/i915/display: Fix the 12 BPC bits for PIPE_MISC reg
Till DISPLAY12 the PIPE_MISC bits 5-7 are used to set the Dithering BPC, with valid values of 6, 8, 10 BPC. For ADLP+ these bits are used to set the PORT OUTPUT BPC, with valid values of: 6, 8, 10, 12 BPC, and need to be programmed whether dithering is
enabled or not.
This patch: -corrects the bits 5-7 for PIPE MISC register for 12 BPC. -renames the bits and mask to have generic names for these bits for dithering bpc and port output bpc.
v3: Added a note for MIPI DSI which uses the PIPE_MISC for readout for pipe_bpp. (Uma Shankar)
v2: Added 'display' to the subject and fixes tag. (Uma Shankar)
Looks Good to me. Reviewed-by: Uma Shankar uma.shankar@intel.com
Fixes: 756f85cffef2 ("drm/i915/bdw: Broadwell has PIPEMISC") Cc: Paulo Zanoni paulo.r.zanoni@intel.com (v1) Cc: Ville Syrjälä ville.syrjala@linux.intel.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: intel-gfx@lists.freedesktop.org Cc: stable@vger.kernel.org # v3.13+
Signed-off-by: Ankit Nautiyal ankit.k.nautiyal@intel.com
drivers/gpu/drm/i915/display/intel_display.c | 34 ++++++++++++++------ drivers/gpu/drm/i915/i915_reg.h | 16 ++++++--- 2 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index b25c596f6f7e..a257e5dc381c 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -5838,16 +5838,18 @@ static void bdw_set_pipemisc(const struct intel_crtc_state *crtc_state)
switch (crtc_state->pipe_bpp) { case 18:
val |= PIPEMISC_DITHER_6_BPC;
val |= PIPEMISC_6_BPC;
val |= PIPEMISC_DITHER_8_BPC;
val |= PIPEMISC_8_BPC;
val |= PIPEMISC_DITHER_10_BPC;
val |= PIPEMISC_10_BPC;
val |= PIPEMISC_DITHER_12_BPC;
/* Port output 12BPC defined for ADLP+ */if (DISPLAY_VER(dev_priv) > 12)val |= PIPEMISC_12_BPC_ADLP;@@ -5900,15 +5902,27 @@ int bdw_get_pipemisc_bpp(struct intel_crtc *crtc)
tmp = intel_de_read(dev_priv, PIPEMISC(crtc->pipe));
- switch (tmp & PIPEMISC_DITHER_BPC_MASK) {
- case PIPEMISC_DITHER_6_BPC:
- switch (tmp & PIPEMISC_BPC_MASK) {
- case PIPEMISC_6_BPC: return 18;
- case PIPEMISC_DITHER_8_BPC:
- case PIPEMISC_8_BPC: return 24;
- case PIPEMISC_DITHER_10_BPC:
- case PIPEMISC_10_BPC: return 30;
- case PIPEMISC_DITHER_12_BPC:
return 36;
- /*
* PORT OUTPUT 12 BPC defined for ADLP+.** TODO:* For previous platforms with DSI interface, bits 5:7* are used for storing pipe_bpp irrespective of dithering.* Since the value of 12 BPC is not defined for these bits* on older platforms, need to find a workaround for 12 BPC* MIPI DSI HW readout.*/- case PIPEMISC_12_BPC_ADLP:
if (DISPLAY_VER(dev_priv) > 12)return 36;fallthrough;diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 167eaa87501b..664970f2bc62 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -6203,11 +6203,17 @@ enum { #define PIPEMISC_HDR_MODE_PRECISION (1 << 23) /* icl+ */ #define PIPEMISC_OUTPUT_COLORSPACE_YUV (1 << 11) #define PIPEMISC_PIXEL_ROUNDING_TRUNC REG_BIT(8) /* tgl+ */ -#define PIPEMISC_DITHER_BPC_MASK (7 << 5) -#define PIPEMISC_DITHER_8_BPC (0 << 5) -#define PIPEMISC_DITHER_10_BPC (1 << 5) -#define PIPEMISC_DITHER_6_BPC (2 << 5) -#define PIPEMISC_DITHER_12_BPC (3 << 5) +/*
- For Display < 13, Bits 5-7 of PIPE MISC represent DITHER BPC with
- valid values of: 6, 8, 10 BPC.
- ADLP+, the bits 5-7 represent PORT OUTPUT BPC with valid values of:
- 6, 8, 10, 12 BPC.
- */
+#define PIPEMISC_BPC_MASK (7 << 5) +#define PIPEMISC_8_BPC (0 << 5) +#define PIPEMISC_10_BPC (1 << 5) +#define PIPEMISC_6_BPC (2 << 5) +#define PIPEMISC_12_BPC_ADLP (4 << 5) /* adlp+ */ #define PIPEMISC_DITHER_ENABLE (1 << 4) #define PIPEMISC_DITHER_TYPE_MASK (3 << 2)
#define PIPEMISC_DITHER_TYPE_SP (0 << 2)
2.25.1