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Commit cb2d7844 authored by Ping Li's avatar Ping Li Committed by Gerrit - the friendly Code Review server
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msm: mdss: Optimize Gamut Mapping programming sequence 



Gamut mapping feature has a huge size 3D LUT table, which consumes
a lot of time to program. This patch optimizes the programming of
the 3D LUT to reduce about half of the register writes.

Change-Id: I4a9fcee6c1cd70d9c04426c394e480c11a6f4648
Signed-off-by: default avatarPing Li <pingli@codeaurora.org>
parent 9aa1df0c

drivers/video/fbdev/msm/mdss_mdp_pp_v1_7.c

+13 −5
Original line number Diff line number Diff line
@@ -833,6 +833,8 @@ static int pp_gamut_set_config(char __iomem *base_addr, 
	struct mdp_gamut_cfg_data *gamut_cfg_data = NULL;

	struct mdp_gamut_data_v1_7 *gamut_data = NULL;

	char __iomem *base_addr_scale = base_addr;

	uint64_t gamut_val;



	if (!base_addr || !cfg_data || !pp_sts) {

		pr_err("invalid params base_addr %pK cfg_data %pK pp_sts_type %pK\n",

		      base_addr, cfg_data, pp_sts);
@@ -900,12 +902,18 @@ static int pp_gamut_set_config(char __iomem *base_addr, 
		val = index_start;

		val |= GAMUT_TABLE_SELECT(i);

		writel_relaxed(val, (base_addr + GAMUT_TABLE_INDEX));

		for (j = 0; j < gamut_data->tbl_size[i]; j++) {

			writel_relaxed(gamut_data->c1_c2_data[i][j],



		writel_relaxed(gamut_data->c1_c2_data[i][0],

			       base_addr + GAMUT_TABLE_LOWER_GB);

			writel_relaxed(gamut_data->c0_data[i][j],

		for (j = 0; j < gamut_data->tbl_size[i] - 1 ; j++) {

			gamut_val = gamut_data->c1_c2_data[i][j + 1];

			gamut_val = (gamut_val << 32) |

					gamut_data->c0_data[i][j];

			writeq_relaxed(gamut_val,

					base_addr + GAMUT_TABLE_UPPER_R);

		}

		writel_relaxed(gamut_data->c0_data[i][j],

					base_addr + GAMUT_TABLE_UPPER_R);

		if ((i >= MDP_GAMUT_SCALE_OFF_TABLE_NUM) ||

				(!gamut_data->map_en))

			continue;