Re: [PATCH v4 02/25] drm/dp: Add DP DSC DPCD receiver capability size define and missing SHIFT

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On 9/12/2018 6:25 AM, Manasi Navare wrote:
This patch defines the DP DSC receiver capability size that gives
total number of DP DSC DPCD registers.
This also adds a missing #defines for DP DSC support missed in the
commit id (ab6a46ea6842ce "Add DPCD definitions for DP 1.4 DSC feature")

v3:
* MIN_SLICE_WIDTH = 2560 (Anusha)
* Define DP_DSC_SLICE_WIDTH_MULTIPLIER = 320
v2:
* Add SHIFT define and DECOMPRESSION_EN define missed in prev patch

Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Ville Syrjala <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Cc: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>
Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
Reviewed-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>

The patch looks good to me.

Reviewed-by: Gaurav K Singh <gaurav.k.singh@xxxxxxxxx>

---
  include/drm/drm_dp_helper.h | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 698082a02b97..7f6237cad10d 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -231,6 +231,8 @@
  #define DP_DSC_MAX_BITS_PER_PIXEL_LOW       0x067   /* eDP 1.4 */
#define DP_DSC_MAX_BITS_PER_PIXEL_HI 0x068 /* eDP 1.4 */
+# define DP_DSC_MAX_BITS_PER_PIXEL_HI_MASK  (0x3 << 0)
+# define DP_DSC_MAX_BITS_PER_PIXEL_HI_SHIFT 8
#define DP_DSC_DEC_COLOR_FORMAT_CAP 0x069
  # define DP_DSC_RGB                         (1 << 0)
@@ -279,6 +281,8 @@
  # define DP_DSC_THROUGHPUT_MODE_1_1000      (14 << 4)
#define DP_DSC_MAX_SLICE_WIDTH 0x06C
+#define DP_DSC_MIN_SLICE_WIDTH_VALUE        2560
+#define DP_DSC_SLICE_WIDTH_MULTIPLIER       320
#define DP_DSC_SLICE_CAP_2 0x06D
  # define DP_DSC_16_PER_DP_DSC_SINK          (1 << 0)
@@ -477,6 +481,7 @@
  # define DP_AUX_FRAME_SYNC_VALID	    (1 << 0)
#define DP_DSC_ENABLE 0x160 /* DP 1.4 */
+# define DP_DECOMPRESSION_EN                (1 << 0)
#define DP_PSR_EN_CFG 0x170 /* XXX 1.2? */
  # define DP_PSR_ENABLE			    (1 << 0)
@@ -963,6 +968,7 @@ u8 drm_dp_get_adjust_request_pre_emphasis(const u8 link_status[DP_LINK_STATUS_SI
#define DP_BRANCH_OUI_HEADER_SIZE 0xc
  #define DP_RECEIVER_CAP_SIZE		0xf
+#define DP_DSC_RECEIVER_CAP_SIZE        0xf
  #define EDP_PSR_RECEIVER_CAP_SIZE	2
  #define EDP_DISPLAY_CTL_CAP_SIZE	3

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